./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 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/nested_delay_nd.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 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 15:36:08,166 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 15:36:08,246 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 15:36:08,252 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 15:36:08,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 15:36:08,284 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 15:36:08,285 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 15:36:08,285 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 15:36:08,286 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 15:36:08,287 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 15:36:08,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 15:36:08,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 15:36:08,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 15:36:08,290 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 15:36:08,290 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 15:36:08,291 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 15:36:08,291 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 15:36:08,292 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 15:36:08,294 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 15:36:08,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 15:36:08,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 15:36:08,296 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 15:36:08,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 15:36:08,297 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 15:36:08,297 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 15:36:08,297 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 15:36:08,297 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 15:36:08,297 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 15:36:08,298 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 15:36:08,298 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 15:36:08,298 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 15:36:08,298 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 15:36:08,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:36:08,298 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 15:36:08,299 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 15:36:08,299 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 15:36:08,299 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 15:36:08,299 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 15:36:08,299 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 15:36:08,300 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 15:36:08,300 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 15:36:08,303 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 15:36:08,303 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 15:36:08,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 15:36:08,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 15:36:08,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 15:36:08,632 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 15:36:08,632 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 15:36:08,633 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2024-09-12 15:36:09,933 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 15:36:10,159 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 15:36:10,159 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2024-09-12 15:36:10,166 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/541fad2e4/a29633ecad1f4971a6fdc1783eef12fe/FLAG192771587 [2024-09-12 15:36:10,178 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/541fad2e4/a29633ecad1f4971a6fdc1783eef12fe [2024-09-12 15:36:10,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 15:36:10,182 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 15:36:10,183 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 15:36:10,183 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 15:36:10,189 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 15:36:10,190 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,191 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e22daf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10, skipping insertion in model container [2024-09-12 15:36:10,191 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,208 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 15:36:10,357 WARN L247 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/nested_delay_nd.c[465,478] [2024-09-12 15:36:10,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:36:10,391 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 15:36:10,402 WARN L247 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/nested_delay_nd.c[465,478] [2024-09-12 15:36:10,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:36:10,436 INFO L204 MainTranslator]: Completed translation [2024-09-12 15:36:10,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10 WrapperNode [2024-09-12 15:36:10,437 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 15:36:10,438 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 15:36:10,438 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 15:36:10,438 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 15:36:10,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,456 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 15:36:10,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 15:36:10,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 15:36:10,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 15:36:10,458 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 15:36:10,468 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,470 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,481 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]. [2024-09-12 15:36:10,485 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,485 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,488 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,493 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,494 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,498 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,500 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 15:36:10,500 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 15:36:10,501 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 15:36:10,501 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 15:36:10,501 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (1/1) ... [2024-09-12 15:36:10,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:36:10,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:36:10,535 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) [2024-09-12 15:36:10,538 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 [2024-09-12 15:36:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 15:36:10,661 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 15:36:10,662 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 15:36:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 15:36:10,662 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 15:36:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 15:36:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 15:36:10,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 15:36:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 15:36:10,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 15:36:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 15:36:10,664 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 15:36:10,732 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 15:36:10,735 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 15:36:10,908 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-12 15:36:10,911 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 15:36:10,939 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 15:36:10,940 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 15:36:10,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:36:10 BoogieIcfgContainer [2024-09-12 15:36:10,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 15:36:10,943 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 15:36:10,943 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 15:36:10,946 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 15:36:10,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 03:36:10" (1/3) ... [2024-09-12 15:36:10,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adb8cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:36:10, skipping insertion in model container [2024-09-12 15:36:10,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:36:10" (2/3) ... [2024-09-12 15:36:10,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1adb8cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:36:10, skipping insertion in model container [2024-09-12 15:36:10,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:36:10" (3/3) ... [2024-09-12 15:36:10,951 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2024-09-12 15:36:10,968 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 15:36:10,968 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 15:36:11,025 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 15:36:11,035 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;@78f3cd85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 15:36:11,036 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 15:36:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:36:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 15:36:11,047 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:11,047 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:11,048 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:11,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:11,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1899367790, now seen corresponding path program 1 times [2024-09-12 15:36:11,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:11,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333200182] [2024-09-12 15:36:11,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:11,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:11,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:11,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:11,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:11,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333200182] [2024-09-12 15:36:11,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333200182] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:36:11,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:36:11,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 15:36:11,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869783320] [2024-09-12 15:36:11,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:36:11,263 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 15:36:11,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:11,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 15:36:11,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 15:36:11,287 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:36:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:11,390 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2024-09-12 15:36:11,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 15:36:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-09-12 15:36:11,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:11,398 INFO L225 Difference]: With dead ends: 48 [2024-09-12 15:36:11,399 INFO L226 Difference]: Without dead ends: 26 [2024-09-12 15:36:11,401 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 15:36:11,406 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:11,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:36:11,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-12 15:36:11,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-12 15:36:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:36:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2024-09-12 15:36:11,447 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2024-09-12 15:36:11,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:11,447 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2024-09-12 15:36:11,447 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:36:11,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2024-09-12 15:36:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 15:36:11,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:11,452 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:11,453 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 15:36:11,453 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:11,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:11,454 INFO L85 PathProgramCache]: Analyzing trace with hash -678482725, now seen corresponding path program 1 times [2024-09-12 15:36:11,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:11,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222564651] [2024-09-12 15:36:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:11,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:11,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:11,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:11,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:11,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222564651] [2024-09-12 15:36:11,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222564651] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:36:11,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:36:11,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:36:11,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026470884] [2024-09-12 15:36:11,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:36:11,659 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:36:11,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:11,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:36:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:36:11,662 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:36:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:11,789 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2024-09-12 15:36:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:36:11,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-09-12 15:36:11,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:11,791 INFO L225 Difference]: With dead ends: 44 [2024-09-12 15:36:11,792 INFO L226 Difference]: Without dead ends: 29 [2024-09-12 15:36:11,792 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:36:11,794 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:11,795 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 13 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:36:11,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-12 15:36:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-09-12 15:36:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:36:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-12 15:36:11,804 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 20 [2024-09-12 15:36:11,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:11,805 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-12 15:36:11,805 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:36:11,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:11,806 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-12 15:36:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 15:36:11,806 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:11,806 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:11,806 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 15:36:11,807 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:11,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2109323453, now seen corresponding path program 1 times [2024-09-12 15:36:11,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:11,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636786798] [2024-09-12 15:36:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:11,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:11,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:11,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 15:36:11,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636786798] [2024-09-12 15:36:11,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636786798] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:36:11,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:36:11,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 15:36:11,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287544560] [2024-09-12 15:36:11,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:36:11,882 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 15:36:11,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:11,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 15:36:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 15:36:11,883 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:36:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:11,969 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2024-09-12 15:36:11,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 15:36:11,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-09-12 15:36:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:11,972 INFO L225 Difference]: With dead ends: 48 [2024-09-12 15:36:11,973 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 15:36:11,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 15:36:11,975 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:11,978 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:36:11,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 15:36:11,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-09-12 15:36:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:36:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-09-12 15:36:11,999 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2024-09-12 15:36:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:11,999 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-09-12 15:36:11,999 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:36:12,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-09-12 15:36:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 15:36:12,000 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:12,000 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:12,001 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 15:36:12,001 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:12,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash -334316091, now seen corresponding path program 1 times [2024-09-12 15:36:12,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:12,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151096170] [2024-09-12 15:36:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:12,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:12,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:12,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:12,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:12,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151096170] [2024-09-12 15:36:12,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151096170] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:36:12,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165846872] [2024-09-12 15:36:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:12,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:36:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:36:12,133 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) [2024-09-12 15:36:12,135 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 15:36:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:12,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 15:36:12,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:36:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:12,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:36:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:12,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165846872] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:36:12,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:36:12,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-09-12 15:36:12,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342532705] [2024-09-12 15:36:12,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:36:12,346 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 15:36:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 15:36:12,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:36:12,348 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:36:12,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:12,467 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2024-09-12 15:36:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:36:12,467 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2024-09-12 15:36:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:12,468 INFO L225 Difference]: With dead ends: 54 [2024-09-12 15:36:12,468 INFO L226 Difference]: Without dead ends: 37 [2024-09-12 15:36:12,469 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-09-12 15:36:12,469 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:12,470 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 14 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:36:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-12 15:36:12,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-09-12 15:36:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:36:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-09-12 15:36:12,478 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 23 [2024-09-12 15:36:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:12,478 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-09-12 15:36:12,478 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:36:12,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:12,479 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-09-12 15:36:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 15:36:12,480 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:12,480 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:12,498 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-12 15:36:12,681 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:36:12,681 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:12,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:12,682 INFO L85 PathProgramCache]: Analyzing trace with hash -914591395, now seen corresponding path program 2 times [2024-09-12 15:36:12,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:12,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619699695] [2024-09-12 15:36:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:12,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:12,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:12,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:12,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:12,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619699695] [2024-09-12 15:36:12,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619699695] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:36:12,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731401233] [2024-09-12 15:36:12,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:36:12,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:36:12,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:36:12,851 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) [2024-09-12 15:36:12,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 15:36:12,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:36:12,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:36:12,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-12 15:36:12,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:36:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 15:36:12,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:36:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 15:36:13,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731401233] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:36:13,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:36:13,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 15 [2024-09-12 15:36:13,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922920190] [2024-09-12 15:36:13,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:36:13,060 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 15:36:13,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:13,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 15:36:13,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:36:13,062 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:36:14,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:14,023 INFO L93 Difference]: Finished difference Result 178 states and 247 transitions. [2024-09-12 15:36:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-12 15:36:14,023 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-09-12 15:36:14,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:14,026 INFO L225 Difference]: With dead ends: 178 [2024-09-12 15:36:14,026 INFO L226 Difference]: Without dead ends: 152 [2024-09-12 15:36:14,029 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=677, Invalid=2079, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:36:14,030 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 219 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:14,030 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 30 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:36:14,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-09-12 15:36:14,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2024-09-12 15:36:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.3564356435643565) internal successors, (137), 102 states have internal predecessors, (137), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:36:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2024-09-12 15:36:14,074 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 32 [2024-09-12 15:36:14,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:14,074 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2024-09-12 15:36:14,075 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:36:14,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:14,076 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2024-09-12 15:36:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 15:36:14,078 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:14,078 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:14,095 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 15:36:14,282 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:36:14,283 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:14,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:14,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2125730691, now seen corresponding path program 1 times [2024-09-12 15:36:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:14,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298139042] [2024-09-12 15:36:14,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:14,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:14,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:14,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-12 15:36:14,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:14,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298139042] [2024-09-12 15:36:14,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298139042] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:36:14,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:36:14,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 15:36:14,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816093660] [2024-09-12 15:36:14,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:36:14,379 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 15:36:14,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:14,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 15:36:14,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 15:36:14,380 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:36:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:14,455 INFO L93 Difference]: Finished difference Result 222 states and 296 transitions. [2024-09-12 15:36:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 15:36:14,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2024-09-12 15:36:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:14,458 INFO L225 Difference]: With dead ends: 222 [2024-09-12 15:36:14,458 INFO L226 Difference]: Without dead ends: 120 [2024-09-12 15:36:14,459 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 15:36:14,460 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:14,460 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 33 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:36:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-12 15:36:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2024-09-12 15:36:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 74 states have internal predecessors, (95), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:36:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2024-09-12 15:36:14,480 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 35 [2024-09-12 15:36:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:14,480 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2024-09-12 15:36:14,480 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:36:14,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2024-09-12 15:36:14,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 15:36:14,482 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:14,482 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:14,482 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-12 15:36:14,482 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:14,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1071915545, now seen corresponding path program 1 times [2024-09-12 15:36:14,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:14,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911812127] [2024-09-12 15:36:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:14,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:14,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:14,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:14,527 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-12 15:36:14,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:14,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911812127] [2024-09-12 15:36:14,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911812127] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:36:14,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:36:14,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 15:36:14,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653788244] [2024-09-12 15:36:14,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:36:14,530 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 15:36:14,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 15:36:14,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 15:36:14,531 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:36:14,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:14,602 INFO L93 Difference]: Finished difference Result 160 states and 204 transitions. [2024-09-12 15:36:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 15:36:14,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2024-09-12 15:36:14,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:14,603 INFO L225 Difference]: With dead ends: 160 [2024-09-12 15:36:14,603 INFO L226 Difference]: Without dead ends: 88 [2024-09-12 15:36:14,606 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 15:36:14,607 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:14,608 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:36:14,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-12 15:36:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-12 15:36:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 79 states have internal predecessors, (100), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:36:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2024-09-12 15:36:14,634 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 36 [2024-09-12 15:36:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:14,634 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2024-09-12 15:36:14,634 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:36:14,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:14,635 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2024-09-12 15:36:14,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 15:36:14,638 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:14,638 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:14,638 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-12 15:36:14,638 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:14,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:14,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1014657243, now seen corresponding path program 1 times [2024-09-12 15:36:14,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:14,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379218482] [2024-09-12 15:36:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:14,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:14,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:14,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:14,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:14,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379218482] [2024-09-12 15:36:14,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379218482] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:36:14,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402353303] [2024-09-12 15:36:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:14,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:36:14,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:36:14,770 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) [2024-09-12 15:36:14,772 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 15:36:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:14,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 15:36:14,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:36:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:14,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:36:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:15,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402353303] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:36:15,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:36:15,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2024-09-12 15:36:15,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982912156] [2024-09-12 15:36:15,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:36:15,106 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 15:36:15,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:15,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 15:36:15,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=305, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:36:15,107 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:36:15,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:15,350 INFO L93 Difference]: Finished difference Result 239 states and 321 transitions. [2024-09-12 15:36:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:36:15,351 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2024-09-12 15:36:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:15,353 INFO L225 Difference]: With dead ends: 239 [2024-09-12 15:36:15,353 INFO L226 Difference]: Without dead ends: 162 [2024-09-12 15:36:15,354 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=562, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:36:15,355 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:15,355 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 14 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:36:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-12 15:36:15,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 150. [2024-09-12 15:36:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 140 states have (on average 1.25) internal successors, (175), 141 states have internal predecessors, (175), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:36:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2024-09-12 15:36:15,406 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 36 [2024-09-12 15:36:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:15,406 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2024-09-12 15:36:15,406 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:36:15,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2024-09-12 15:36:15,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 15:36:15,409 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:15,410 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:15,427 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 15:36:15,615 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-12 15:36:15,616 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:15,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1524013939, now seen corresponding path program 2 times [2024-09-12 15:36:15,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:15,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810257659] [2024-09-12 15:36:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:15,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:15,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:15,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:15,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810257659] [2024-09-12 15:36:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810257659] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:36:15,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539668113] [2024-09-12 15:36:15,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:36:15,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:36:15,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:36:15,911 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) [2024-09-12 15:36:15,913 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 15:36:15,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:36:15,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:36:15,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-12 15:36:15,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:36:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:16,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:36:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:16,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539668113] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:36:16,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:36:16,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2024-09-12 15:36:16,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469432909] [2024-09-12 15:36:16,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:36:16,635 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:36:16,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:16,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:36:16,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=1103, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:36:16,637 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:36:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:17,184 INFO L93 Difference]: Finished difference Result 443 states and 595 transitions. [2024-09-12 15:36:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:36:17,185 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2024-09-12 15:36:17,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:17,187 INFO L225 Difference]: With dead ends: 443 [2024-09-12 15:36:17,187 INFO L226 Difference]: Without dead ends: 304 [2024-09-12 15:36:17,189 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1197, Invalid=2109, Unknown=0, NotChecked=0, Total=3306 [2024-09-12 15:36:17,189 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 264 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:17,190 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 15 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:36:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-09-12 15:36:17,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 276. [2024-09-12 15:36:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 266 states have (on average 1.236842105263158) internal successors, (329), 267 states have internal predecessors, (329), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 15:36:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 338 transitions. [2024-09-12 15:36:17,249 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 338 transitions. Word has length 57 [2024-09-12 15:36:17,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:17,250 INFO L474 AbstractCegarLoop]: Abstraction has 276 states and 338 transitions. [2024-09-12 15:36:17,250 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0454545454545454) internal successors, (134), 43 states have internal predecessors, (134), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:36:17,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 338 transitions. [2024-09-12 15:36:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-12 15:36:17,254 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:17,254 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:17,272 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 15:36:17,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:36:17,455 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:17,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:17,455 INFO L85 PathProgramCache]: Analyzing trace with hash -610331763, now seen corresponding path program 3 times [2024-09-12 15:36:17,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:17,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820204054] [2024-09-12 15:36:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:17,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:18,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:18,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:18,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:18,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:18,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820204054] [2024-09-12 15:36:18,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820204054] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:36:18,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757634206] [2024-09-12 15:36:18,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:36:18,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:36:18,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:36:18,219 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) [2024-09-12 15:36:18,221 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 15:36:18,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:36:18,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:36:18,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 15:36:18,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:36:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2024-09-12 15:36:18,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:36:18,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757634206] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:36:18,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:36:18,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [31] total 38 [2024-09-12 15:36:18,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581234093] [2024-09-12 15:36:18,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:36:18,671 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 15:36:18,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:18,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 15:36:18,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=976, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:36:18,673 INFO L87 Difference]: Start difference. First operand 276 states and 338 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:36:18,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:18,852 INFO L93 Difference]: Finished difference Result 460 states and 556 transitions. [2024-09-12 15:36:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:36:18,853 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 99 [2024-09-12 15:36:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:18,855 INFO L225 Difference]: With dead ends: 460 [2024-09-12 15:36:18,856 INFO L226 Difference]: Without dead ends: 458 [2024-09-12 15:36:18,857 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1048, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 15:36:18,858 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:18,859 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:36:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2024-09-12 15:36:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2024-09-12 15:36:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 442 states have (on average 1.2171945701357465) internal successors, (538), 444 states have internal predecessors, (538), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 15:36:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 551 transitions. [2024-09-12 15:36:18,943 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 551 transitions. Word has length 99 [2024-09-12 15:36:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:18,943 INFO L474 AbstractCegarLoop]: Abstraction has 456 states and 551 transitions. [2024-09-12 15:36:18,944 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:36:18,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:18,945 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 551 transitions. [2024-09-12 15:36:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-12 15:36:18,947 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:18,947 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:18,960 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 15:36:19,147 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 15:36:19,148 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:19,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash -612178805, now seen corresponding path program 1 times [2024-09-12 15:36:19,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:19,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240428063] [2024-09-12 15:36:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:19,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:19,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:19,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2024-09-12 15:36:19,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240428063] [2024-09-12 15:36:19,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240428063] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:36:19,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:36:19,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-12 15:36:19,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442252716] [2024-09-12 15:36:19,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:36:19,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 15:36:19,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:19,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 15:36:19,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:36:19,339 INFO L87 Difference]: Start difference. First operand 456 states and 551 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:36:19,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:19,549 INFO L93 Difference]: Finished difference Result 978 states and 1200 transitions. [2024-09-12 15:36:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:36:19,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2024-09-12 15:36:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:19,556 INFO L225 Difference]: With dead ends: 978 [2024-09-12 15:36:19,556 INFO L226 Difference]: Without dead ends: 713 [2024-09-12 15:36:19,557 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:36:19,558 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:19,558 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 21 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:36:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2024-09-12 15:36:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2024-09-12 15:36:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 696 states have (on average 1.221264367816092) internal successors, (850), 699 states have internal predecessors, (850), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-12 15:36:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 869 transitions. [2024-09-12 15:36:19,675 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 869 transitions. Word has length 99 [2024-09-12 15:36:19,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:19,675 INFO L474 AbstractCegarLoop]: Abstraction has 713 states and 869 transitions. [2024-09-12 15:36:19,675 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:36:19,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 869 transitions. [2024-09-12 15:36:19,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-12 15:36:19,678 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:19,678 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:19,678 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-12 15:36:19,678 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:19,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:19,679 INFO L85 PathProgramCache]: Analyzing trace with hash 119150093, now seen corresponding path program 1 times [2024-09-12 15:36:19,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:19,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798146771] [2024-09-12 15:36:19,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:19,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:20,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:20,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:20,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:20,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798146771] [2024-09-12 15:36:20,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798146771] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:36:20,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111164852] [2024-09-12 15:36:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:20,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:36:20,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:36:20,362 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) [2024-09-12 15:36:20,364 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 15:36:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:20,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-12 15:36:20,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:36:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:21,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:36:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:22,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111164852] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:36:22,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:36:22,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 87 [2024-09-12 15:36:22,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563990497] [2024-09-12 15:36:22,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:36:22,424 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-09-12 15:36:22,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:22,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-09-12 15:36:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3063, Invalid=4419, Unknown=0, NotChecked=0, Total=7482 [2024-09-12 15:36:22,428 INFO L87 Difference]: Start difference. First operand 713 states and 869 transitions. Second operand has 87 states, 87 states have (on average 3.0) internal successors, (261), 86 states have internal predecessors, (261), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:36:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:25,868 INFO L93 Difference]: Finished difference Result 2542 states and 3418 transitions. [2024-09-12 15:36:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2024-09-12 15:36:25,869 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.0) internal successors, (261), 86 states have internal predecessors, (261), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 99 [2024-09-12 15:36:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:25,877 INFO L225 Difference]: With dead ends: 2542 [2024-09-12 15:36:25,877 INFO L226 Difference]: Without dead ends: 1999 [2024-09-12 15:36:25,885 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10338 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9966, Invalid=21186, Unknown=0, NotChecked=0, Total=31152 [2024-09-12 15:36:25,885 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 988 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:25,885 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 29 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:36:25,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2024-09-12 15:36:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1819. [2024-09-12 15:36:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1797 states have (on average 1.196438508625487) internal successors, (2150), 1801 states have internal predecessors, (2150), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-12 15:36:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2175 transitions. [2024-09-12 15:36:26,182 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2175 transitions. Word has length 99 [2024-09-12 15:36:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:26,183 INFO L474 AbstractCegarLoop]: Abstraction has 1819 states and 2175 transitions. [2024-09-12 15:36:26,183 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.0) internal successors, (261), 86 states have internal predecessors, (261), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:36:26,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2175 transitions. [2024-09-12 15:36:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-09-12 15:36:26,185 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:26,186 INFO L216 NwaCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:26,205 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 15:36:26,387 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-12 15:36:26,387 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:26,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:26,388 INFO L85 PathProgramCache]: Analyzing trace with hash 756563597, now seen corresponding path program 2 times [2024-09-12 15:36:26,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:26,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667389312] [2024-09-12 15:36:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:28,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:28,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:28,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:28,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667389312] [2024-09-12 15:36:28,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667389312] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:36:28,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060819233] [2024-09-12 15:36:28,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:36:28,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:36:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:36:28,337 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) [2024-09-12 15:36:28,345 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 15:36:28,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:36:28,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:36:28,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-12 15:36:28,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:36:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:30,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:36:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:36:33,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060819233] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:36:33,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:36:33,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 173 [2024-09-12 15:36:33,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959163281] [2024-09-12 15:36:33,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:36:33,748 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2024-09-12 15:36:33,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:33,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2024-09-12 15:36:33,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12125, Invalid=17631, Unknown=0, NotChecked=0, Total=29756 [2024-09-12 15:36:33,756 INFO L87 Difference]: Start difference. First operand 1819 states and 2175 transitions. Second operand has 173 states, 173 states have (on average 2.9710982658959537) internal successors, (514), 172 states have internal predecessors, (514), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:36:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:53,507 INFO L93 Difference]: Finished difference Result 12026 states and 14700 transitions. [2024-09-12 15:36:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 335 states. [2024-09-12 15:36:53,508 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.9710982658959537) internal successors, (514), 172 states have internal predecessors, (514), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 183 [2024-09-12 15:36:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:53,549 INFO L225 Difference]: With dead ends: 12026 [2024-09-12 15:36:53,550 INFO L226 Difference]: Without dead ends: 10628 [2024-09-12 15:36:53,568 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67792 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=60774, Invalid=140378, Unknown=0, NotChecked=0, Total=201152 [2024-09-12 15:36:53,569 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2314 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:53,569 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2315 Valid, 34 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 15:36:53,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10628 states. [2024-09-12 15:36:54,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10628 to 4196. [2024-09-12 15:36:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4196 states, 4169 states have (on average 1.2165987047253537) internal successors, (5072), 4174 states have internal predecessors, (5072), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-12 15:36:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4196 states to 4196 states and 5103 transitions. [2024-09-12 15:36:54,537 INFO L78 Accepts]: Start accepts. Automaton has 4196 states and 5103 transitions. Word has length 183 [2024-09-12 15:36:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:54,538 INFO L474 AbstractCegarLoop]: Abstraction has 4196 states and 5103 transitions. [2024-09-12 15:36:54,538 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 2.9710982658959537) internal successors, (514), 172 states have internal predecessors, (514), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 15:36:54,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4196 states and 5103 transitions. [2024-09-12 15:36:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2024-09-12 15:36:54,544 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:54,544 INFO L216 NwaCegarLoop]: trace histogram [108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:54,561 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 15:36:54,748 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:36:54,749 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:54,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:54,749 INFO L85 PathProgramCache]: Analyzing trace with hash 613596365, now seen corresponding path program 1 times [2024-09-12 15:36:54,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:54,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282579730] [2024-09-12 15:36:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:54,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:55,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:36:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:55,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:36:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:36:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17442 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17442 trivial. 0 not checked. [2024-09-12 15:36:55,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:36:55,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282579730] [2024-09-12 15:36:55,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282579730] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:36:55,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:36:55,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-12 15:36:55,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550821106] [2024-09-12 15:36:55,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:36:55,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 15:36:55,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:36:55,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 15:36:55,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:36:55,018 INFO L87 Difference]: Start difference. First operand 4196 states and 5103 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:36:56,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:36:56,313 INFO L93 Difference]: Finished difference Result 7524 states and 9224 transitions. [2024-09-12 15:36:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-12 15:36:56,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 345 [2024-09-12 15:36:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:36:56,334 INFO L225 Difference]: With dead ends: 7524 [2024-09-12 15:36:56,335 INFO L226 Difference]: Without dead ends: 5851 [2024-09-12 15:36:56,338 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:36:56,338 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:36:56,339 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 30 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:36:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2024-09-12 15:36:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 4871. [2024-09-12 15:36:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4871 states, 4842 states have (on average 1.2327550598926063) internal successors, (5969), 4847 states have internal predecessors, (5969), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (17), 12 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 15:36:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4871 states to 4871 states and 6004 transitions. [2024-09-12 15:36:57,446 INFO L78 Accepts]: Start accepts. Automaton has 4871 states and 6004 transitions. Word has length 345 [2024-09-12 15:36:57,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:36:57,448 INFO L474 AbstractCegarLoop]: Abstraction has 4871 states and 6004 transitions. [2024-09-12 15:36:57,448 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-12 15:36:57,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 4871 states and 6004 transitions. [2024-09-12 15:36:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2024-09-12 15:36:57,454 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:36:57,454 INFO L216 NwaCegarLoop]: trace histogram [109, 109, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:36:57,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-09-12 15:36:57,455 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:36:57,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:36:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1256704231, now seen corresponding path program 3 times [2024-09-12 15:36:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:36:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362810858] [2024-09-12 15:36:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:36:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:36:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:04,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:04,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:37:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17767 backedges. 0 proven. 17767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:37:04,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362810858] [2024-09-12 15:37:04,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362810858] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:04,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111375212] [2024-09-12 15:37:04,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:37:04,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:04,177 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) [2024-09-12 15:37:04,178 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 15:37:04,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:37:04,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:04,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 15:37:04,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17767 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 17442 trivial. 0 not checked. [2024-09-12 15:37:05,274 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 15:37:05,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111375212] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:37:05,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-12 15:37:05,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [115] total 122 [2024-09-12 15:37:05,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371406405] [2024-09-12 15:37:05,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:37:05,275 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 15:37:05,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:05,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 15:37:05,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6133, Invalid=8629, Unknown=0, NotChecked=0, Total=14762 [2024-09-12 15:37:05,277 INFO L87 Difference]: Start difference. First operand 4871 states and 6004 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:37:06,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:06,300 INFO L93 Difference]: Finished difference Result 4882 states and 6015 transitions. [2024-09-12 15:37:06,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 15:37:06,301 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 348 [2024-09-12 15:37:06,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:06,325 INFO L225 Difference]: With dead ends: 4882 [2024-09-12 15:37:06,325 INFO L226 Difference]: Without dead ends: 4880 [2024-09-12 15:37:06,328 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6137, Invalid=8869, Unknown=0, NotChecked=0, Total=15006 [2024-09-12 15:37:06,329 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:06,329 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2024-09-12 15:37:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 4879. [2024-09-12 15:37:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4879 states, 4848 states have (on average 1.23246699669967) internal successors, (5975), 4854 states have internal predecessors, (5975), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (18), 12 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:37:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4879 states to 4879 states and 6012 transitions. [2024-09-12 15:37:07,647 INFO L78 Accepts]: Start accepts. Automaton has 4879 states and 6012 transitions. Word has length 348 [2024-09-12 15:37:07,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:07,648 INFO L474 AbstractCegarLoop]: Abstraction has 4879 states and 6012 transitions. [2024-09-12 15:37:07,648 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-12 15:37:07,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:07,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4879 states and 6012 transitions. [2024-09-12 15:37:07,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2024-09-12 15:37:07,665 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:07,665 INFO L216 NwaCegarLoop]: trace histogram [216, 216, 216, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:07,683 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 15:37:07,869 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:07,870 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:07,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash 346650736, now seen corresponding path program 1 times [2024-09-12 15:37:07,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:07,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523506958] [2024-09-12 15:37:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:07,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:15,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:15,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:37:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:15,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 341 [2024-09-12 15:37:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 70101 backedges. 35212 proven. 17442 refuted. 0 times theorem prover too weak. 17447 trivial. 0 not checked. [2024-09-12 15:37:15,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:15,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523506958] [2024-09-12 15:37:15,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523506958] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:15,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117357266] [2024-09-12 15:37:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:15,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:15,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:15,647 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) [2024-09-12 15:37:15,648 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 15:37:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:15,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-09-12 15:37:15,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 70101 backedges. 35210 proven. 17442 refuted. 0 times theorem prover too weak. 17449 trivial. 0 not checked. [2024-09-12 15:37:21,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 70101 backedges. 35212 proven. 17442 refuted. 0 times theorem prover too weak. 17447 trivial. 0 not checked. [2024-09-12 15:37:33,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117357266] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:33,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:33,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 332 [2024-09-12 15:37:33,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47747059] [2024-09-12 15:37:33,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:33,985 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 332 states [2024-09-12 15:37:33,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:33,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 332 interpolants. [2024-09-12 15:37:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48405, Invalid=61487, Unknown=0, NotChecked=0, Total=109892 [2024-09-12 15:37:34,007 INFO L87 Difference]: Start difference. First operand 4879 states and 6012 transitions. Second operand has 332 states, 332 states have (on average 3.036144578313253) internal successors, (1008), 331 states have internal predecessors, (1008), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-12 15:38:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:12,382 INFO L93 Difference]: Finished difference Result 61262 states and 67026 transitions. [2024-09-12 15:38:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2024-09-12 15:38:12,383 INFO L78 Accepts]: Start accepts. Automaton has has 332 states, 332 states have (on average 3.036144578313253) internal successors, (1008), 331 states have internal predecessors, (1008), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 680 [2024-09-12 15:38:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:12,547 INFO L225 Difference]: With dead ends: 61262 [2024-09-12 15:38:12,547 INFO L226 Difference]: Without dead ends: 57210 [2024-09-12 15:38:12,584 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1587 GetRequests, 1147 SyntacticMatches, 0 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71936 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=72717, Invalid=122205, Unknown=0, NotChecked=0, Total=194922 [2024-09-12 15:38:12,585 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 1843 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:12,585 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1844 Valid, 22 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 15:38:12,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57210 states. [2024-09-12 15:38:20,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57210 to 11786. [2024-09-12 15:38:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11786 states, 11755 states have (on average 1.1982135261590812) internal successors, (14085), 11761 states have internal predecessors, (14085), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (18), 12 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-12 15:38:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11786 states to 11786 states and 14122 transitions. [2024-09-12 15:38:20,677 INFO L78 Accepts]: Start accepts. Automaton has 11786 states and 14122 transitions. Word has length 680 [2024-09-12 15:38:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:20,678 INFO L474 AbstractCegarLoop]: Abstraction has 11786 states and 14122 transitions. [2024-09-12 15:38:20,679 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 332 states, 332 states have (on average 3.036144578313253) internal successors, (1008), 331 states have internal predecessors, (1008), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-12 15:38:20,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 11786 states and 14122 transitions. [2024-09-12 15:38:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1341 [2024-09-12 15:38:20,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:20,730 INFO L216 NwaCegarLoop]: trace histogram [436, 436, 436, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:20,749 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 15:38:20,931 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 15:38:20,931 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:20,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash 379592880, now seen corresponding path program 2 times [2024-09-12 15:38:20,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:20,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433819834] [2024-09-12 15:38:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:20,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:54,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 15:38:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 671 [2024-09-12 15:38:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 285371 backedges. 143012 proven. 71177 refuted. 0 times theorem prover too weak. 71182 trivial. 0 not checked. [2024-09-12 15:38:54,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:54,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433819834] [2024-09-12 15:38:54,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433819834] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:54,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928668504] [2024-09-12 15:38:54,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:38:54,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:54,772 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) [2024-09-12 15:38:54,774 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 15:38:55,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:38:55,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:55,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 2721 conjuncts, 221 conjuncts are in the unsatisfiable core [2024-09-12 15:38:55,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 285371 backedges. 143010 proven. 71177 refuted. 0 times theorem prover too weak. 71184 trivial. 0 not checked. [2024-09-12 15:39:14,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 285371 backedges. 143012 proven. 71177 refuted. 0 times theorem prover too weak. 71182 trivial. 0 not checked. [2024-09-12 15:40:06,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928668504] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:06,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:06,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [223, 222, 222] total 662 [2024-09-12 15:40:06,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022558389] [2024-09-12 15:40:06,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:06,119 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 662 states [2024-09-12 15:40:06,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:06,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 662 interpolants. [2024-09-12 15:40:06,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193605, Invalid=243977, Unknown=0, NotChecked=0, Total=437582 [2024-09-12 15:40:06,163 INFO L87 Difference]: Start difference. First operand 11786 states and 14122 transitions. Second operand has 662 states, 662 states have (on average 3.0181268882175227) internal successors, (1998), 661 states have internal predecessors, (1998), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7)