./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de52.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 1d5fa637 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/in-de52.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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --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-1d5fa63-m [2024-09-13 08:49:26,397 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 08:49:26,451 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 08:49:26,457 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 08:49:26,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 08:49:26,481 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 08:49:26,482 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 08:49:26,482 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 08:49:26,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 08:49:26,483 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 08:49:26,483 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 08:49:26,483 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 08:49:26,483 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 08:49:26,484 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 08:49:26,484 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 08:49:26,484 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 08:49:26,484 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 08:49:26,485 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 08:49:26,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 08:49:26,485 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 08:49:26,485 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 08:49:26,486 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 08:49:26,496 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 08:49:26,497 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 08:49:26,497 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 08:49:26,497 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 08:49:26,497 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 08:49:26,498 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 08:49:26,498 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 08:49:26,498 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 08:49:26,498 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 08:49:26,498 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 08:49:26,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:49:26,499 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 08:49:26,499 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 08:49:26,499 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 08:49:26,499 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 08:49:26,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 08:49:26,500 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 08:49:26,500 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 08:49:26,500 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 08:49:26,500 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 08:49:26,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 08:49:26,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 08:49:26,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 08:49:26,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 08:49:26,741 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 08:49:26,741 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 08:49:26,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-13 08:49:27,945 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 08:49:28,100 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 08:49:28,101 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-13 08:49:28,106 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a1e7e875e/94dfcd3da01042afa1ae46c8a0a67337/FLAG3e77d8a0c [2024-09-13 08:49:28,518 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a1e7e875e/94dfcd3da01042afa1ae46c8a0a67337 [2024-09-13 08:49:28,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 08:49:28,523 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 08:49:28,524 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 08:49:28,524 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 08:49:28,528 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 08:49:28,529 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230a9e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28, skipping insertion in model container [2024-09-13 08:49:28,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,546 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 08:49:28,669 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/in-de52.c[368,381] [2024-09-13 08:49:28,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:49:28,692 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 08:49:28,701 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/in-de52.c[368,381] [2024-09-13 08:49:28,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:49:28,718 INFO L204 MainTranslator]: Completed translation [2024-09-13 08:49:28,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28 WrapperNode [2024-09-13 08:49:28,719 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 08:49:28,720 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 08:49:28,720 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 08:49:28,720 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 08:49:28,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,730 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,738 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 08:49:28,738 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 08:49:28,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 08:49:28,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 08:49:28,739 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 08:49:28,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,749 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,753 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,773 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]. [2024-09-13 08:49:28,773 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,774 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,776 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,781 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,782 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,787 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,788 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 08:49:28,789 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 08:49:28,789 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 08:49:28,789 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 08:49:28,790 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (1/1) ... [2024-09-13 08:49:28,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:49:28,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:28,816 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) [2024-09-13 08:49:28,818 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 [2024-09-13 08:49:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 08:49:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 08:49:28,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 08:49:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 08:49:28,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 08:49:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 08:49:28,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 08:49:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 08:49:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 08:49:28,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 08:49:28,913 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 08:49:28,915 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 08:49:29,076 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-13 08:49:29,076 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 08:49:29,101 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 08:49:29,102 INFO L318 CfgBuilder]: Removed 5 assume(true) statements. [2024-09-13 08:49:29,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:49:29 BoogieIcfgContainer [2024-09-13 08:49:29,103 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 08:49:29,106 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 08:49:29,106 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 08:49:29,109 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 08:49:29,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 08:49:28" (1/3) ... [2024-09-13 08:49:29,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372a1aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:49:29, skipping insertion in model container [2024-09-13 08:49:29,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:28" (2/3) ... [2024-09-13 08:49:29,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372a1aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:49:29, skipping insertion in model container [2024-09-13 08:49:29,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:49:29" (3/3) ... [2024-09-13 08:49:29,112 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2024-09-13 08:49:29,128 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 08:49:29,128 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 08:49:29,187 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 08:49:29,195 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;@2fea9bc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 08:49:29,196 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 08:49:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:49:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-13 08:49:29,207 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:29,208 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:29,208 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:29,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,214 INFO L85 PathProgramCache]: Analyzing trace with hash -356520028, now seen corresponding path program 1 times [2024-09-13 08:49:29,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:29,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158389926] [2024-09-13 08:49:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:29,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:29,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:29,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:29,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158389926] [2024-09-13 08:49:29,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158389926] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:49:29,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:49:29,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 08:49:29,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800936937] [2024-09-13 08:49:29,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:29,352 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 08:49:29,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:29,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 08:49:29,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 08:49:29,375 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:29,393 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2024-09-13 08:49:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 08:49:29,396 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-13 08:49:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:29,400 INFO L225 Difference]: With dead ends: 38 [2024-09-13 08:49:29,400 INFO L226 Difference]: Without dead ends: 16 [2024-09-13 08:49:29,403 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 08:49:29,407 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:29,409 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-13 08:49:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-13 08:49:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-09-13 08:49:29,437 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 15 [2024-09-13 08:49:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:29,438 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-09-13 08:49:29,438 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-09-13 08:49:29,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-13 08:49:29,439 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:29,440 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:29,440 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 08:49:29,440 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:29,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash 315017388, now seen corresponding path program 1 times [2024-09-13 08:49:29,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:29,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562973185] [2024-09-13 08:49:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:29,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:29,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:29,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:29,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562973185] [2024-09-13 08:49:29,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562973185] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:49:29,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:49:29,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 08:49:29,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736272955] [2024-09-13 08:49:29,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:29,665 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 08:49:29,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:29,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 08:49:29,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:49:29,666 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:29,733 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2024-09-13 08:49:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 08:49:29,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-13 08:49:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:29,734 INFO L225 Difference]: With dead ends: 33 [2024-09-13 08:49:29,734 INFO L226 Difference]: Without dead ends: 22 [2024-09-13 08:49:29,735 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 08:49:29,736 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:29,736 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 48 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:29,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-13 08:49:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-13 08:49:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2024-09-13 08:49:29,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2024-09-13 08:49:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:29,744 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2024-09-13 08:49:29,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2024-09-13 08:49:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-13 08:49:29,745 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:29,745 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:29,745 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 08:49:29,745 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:29,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1680996671, now seen corresponding path program 1 times [2024-09-13 08:49:29,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:29,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755456914] [2024-09-13 08:49:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:29,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:29,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:29,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:29,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755456914] [2024-09-13 08:49:29,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755456914] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:49:29,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:49:29,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 08:49:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643870952] [2024-09-13 08:49:29,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:29,805 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 08:49:29,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 08:49:29,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:49:29,806 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:29,831 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2024-09-13 08:49:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 08:49:29,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-13 08:49:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:29,834 INFO L225 Difference]: With dead ends: 34 [2024-09-13 08:49:29,834 INFO L226 Difference]: Without dead ends: 27 [2024-09-13 08:49:29,834 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:49:29,835 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:29,835 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-13 08:49:29,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-13 08:49:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-09-13 08:49:29,850 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2024-09-13 08:49:29,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:29,850 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-09-13 08:49:29,852 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-09-13 08:49:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-13 08:49:29,853 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:29,853 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:29,853 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 08:49:29,853 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:29,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1211142226, now seen corresponding path program 1 times [2024-09-13 08:49:29,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:29,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270080179] [2024-09-13 08:49:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:29,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:29,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:29,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:29,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270080179] [2024-09-13 08:49:29,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270080179] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:49:29,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:49:29,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 08:49:29,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865231096] [2024-09-13 08:49:29,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:29,903 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 08:49:29,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:29,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 08:49:29,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:49:29,905 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:29,933 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2024-09-13 08:49:29,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 08:49:29,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-13 08:49:29,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:29,934 INFO L225 Difference]: With dead ends: 40 [2024-09-13 08:49:29,935 INFO L226 Difference]: Without dead ends: 31 [2024-09-13 08:49:29,936 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:49:29,937 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:29,938 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:29,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-13 08:49:29,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-13 08:49:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2024-09-13 08:49:29,949 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 16 [2024-09-13 08:49:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:29,949 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2024-09-13 08:49:29,949 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:29,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,949 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2024-09-13 08:49:29,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-13 08:49:29,950 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:29,950 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:29,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 08:49:29,954 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:29,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1994481964, now seen corresponding path program 1 times [2024-09-13 08:49:29,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:29,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138120426] [2024-09-13 08:49:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:29,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:30,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:30,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:30,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138120426] [2024-09-13 08:49:30,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138120426] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:49:30,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:49:30,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 08:49:30,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036777469] [2024-09-13 08:49:30,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:30,033 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 08:49:30,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:30,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 08:49:30,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 08:49:30,034 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:30,066 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-13 08:49:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 08:49:30,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-13 08:49:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:30,067 INFO L225 Difference]: With dead ends: 39 [2024-09-13 08:49:30,067 INFO L226 Difference]: Without dead ends: 27 [2024-09-13 08:49:30,068 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:49:30,069 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:30,070 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-13 08:49:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-13 08:49:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-09-13 08:49:30,076 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2024-09-13 08:49:30,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:30,076 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-09-13 08:49:30,076 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:30,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-09-13 08:49:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 08:49:30,077 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:30,077 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:30,077 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-13 08:49:30,078 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:30,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1135312256, now seen corresponding path program 1 times [2024-09-13 08:49:30,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:30,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813316856] [2024-09-13 08:49:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:30,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:30,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:49:30,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:30,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813316856] [2024-09-13 08:49:30,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813316856] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:30,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262876203] [2024-09-13 08:49:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:30,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:30,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:30,194 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) [2024-09-13 08:49:30,199 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 08:49:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:30,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 08:49:30,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:49:30,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:49:30,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262876203] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:30,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-13 08:49:30,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-13 08:49:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371894231] [2024-09-13 08:49:30,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:30,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 08:49:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 08:49:30,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:49:30,341 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:30,367 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-09-13 08:49:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 08:49:30,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-13 08:49:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:30,369 INFO L225 Difference]: With dead ends: 34 [2024-09-13 08:49:30,369 INFO L226 Difference]: Without dead ends: 24 [2024-09-13 08:49:30,369 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:49:30,370 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:30,370 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-13 08:49:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-13 08:49:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-09-13 08:49:30,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 18 [2024-09-13 08:49:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:30,375 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-09-13 08:49:30,375 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:30,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-09-13 08:49:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 08:49:30,376 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:30,376 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:30,391 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:30,576 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 08:49:30,577 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:30,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1896560672, now seen corresponding path program 1 times [2024-09-13 08:49:30,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:30,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23002027] [2024-09-13 08:49:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:30,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:30,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:49:30,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23002027] [2024-09-13 08:49:30,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23002027] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440712636] [2024-09-13 08:49:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:30,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:30,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:30,680 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) [2024-09-13 08:49:30,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 08:49:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:30,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 08:49:30,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:30,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:49:30,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440712636] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:30,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-13 08:49:30,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2024-09-13 08:49:30,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137732180] [2024-09-13 08:49:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:30,786 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 08:49:30,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:30,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 08:49:30,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:49:30,788 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:30,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:30,812 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-09-13 08:49:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 08:49:30,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-13 08:49:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:30,816 INFO L225 Difference]: With dead ends: 29 [2024-09-13 08:49:30,816 INFO L226 Difference]: Without dead ends: 21 [2024-09-13 08:49:30,816 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:49:30,818 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:30,818 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-13 08:49:30,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-13 08:49:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-13 08:49:30,825 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 18 [2024-09-13 08:49:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:30,825 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-13 08:49:30,825 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:30,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:30,825 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-13 08:49:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-13 08:49:30,826 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:30,826 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:30,839 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:31,026 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 08:49:31,027 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:31,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:31,027 INFO L85 PathProgramCache]: Analyzing trace with hash -399434628, now seen corresponding path program 1 times [2024-09-13 08:49:31,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:31,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941853514] [2024-09-13 08:49:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:31,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:31,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:31,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:31,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941853514] [2024-09-13 08:49:31,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941853514] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:31,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925422381] [2024-09-13 08:49:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:31,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:31,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:31,119 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) [2024-09-13 08:49:31,120 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 08:49:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:31,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 08:49:31,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:31,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:31,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925422381] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:31,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:31,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-13 08:49:31,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260303143] [2024-09-13 08:49:31,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:31,249 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 08:49:31,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:31,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 08:49:31,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-13 08:49:31,250 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:31,534 INFO L93 Difference]: Finished difference Result 77 states and 116 transitions. [2024-09-13 08:49:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 08:49:31,534 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-13 08:49:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:31,536 INFO L225 Difference]: With dead ends: 77 [2024-09-13 08:49:31,536 INFO L226 Difference]: Without dead ends: 65 [2024-09-13 08:49:31,537 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2024-09-13 08:49:31,537 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:31,538 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 81 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-13 08:49:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 32. [2024-09-13 08:49:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-09-13 08:49:31,551 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2024-09-13 08:49:31,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:31,551 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-09-13 08:49:31,551 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:31,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-09-13 08:49:31,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-13 08:49:31,552 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:31,552 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:31,565 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:31,752 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 [2024-09-13 08:49:31,753 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:31,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:31,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1802263027, now seen corresponding path program 1 times [2024-09-13 08:49:31,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:31,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764494981] [2024-09-13 08:49:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:31,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:31,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:49:31,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:31,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764494981] [2024-09-13 08:49:31,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764494981] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:31,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839052589] [2024-09-13 08:49:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:31,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:31,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:31,814 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) [2024-09-13 08:49:31,815 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 08:49:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:31,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 08:49:31,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:31,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:31,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839052589] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:31,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:31,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-13 08:49:31,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855702755] [2024-09-13 08:49:31,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:31,908 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 08:49:31,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:31,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 08:49:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-13 08:49:31,909 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:31,965 INFO L93 Difference]: Finished difference Result 66 states and 97 transitions. [2024-09-13 08:49:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 08:49:31,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-13 08:49:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:31,966 INFO L225 Difference]: With dead ends: 66 [2024-09-13 08:49:31,966 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 08:49:31,966 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-13 08:49:31,967 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:31,967 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:31,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 08:49:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2024-09-13 08:49:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2024-09-13 08:49:31,980 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 19 [2024-09-13 08:49:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:31,980 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2024-09-13 08:49:31,980 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:31,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2024-09-13 08:49:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-13 08:49:31,981 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:31,981 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] [2024-09-13 08:49:31,993 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:32,184 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 [2024-09-13 08:49:32,185 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:32,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:32,185 INFO L85 PathProgramCache]: Analyzing trace with hash 537966210, now seen corresponding path program 1 times [2024-09-13 08:49:32,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:32,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501379294] [2024-09-13 08:49:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:32,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:32,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:32,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:32,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501379294] [2024-09-13 08:49:32,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501379294] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:32,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110340947] [2024-09-13 08:49:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:32,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:32,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:32,315 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) [2024-09-13 08:49:32,317 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 08:49:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:32,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 08:49:32,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:32,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:32,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110340947] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:32,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:32,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-09-13 08:49:32,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857070857] [2024-09-13 08:49:32,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:32,465 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 08:49:32,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 08:49:32,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-13 08:49:32,466 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:32,539 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-09-13 08:49:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 08:49:32,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-13 08:49:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:32,540 INFO L225 Difference]: With dead ends: 62 [2024-09-13 08:49:32,540 INFO L226 Difference]: Without dead ends: 47 [2024-09-13 08:49:32,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-13 08:49:32,541 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:32,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 84 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:32,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-13 08:49:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-09-13 08:49:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2024-09-13 08:49:32,556 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 20 [2024-09-13 08:49:32,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:32,556 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2024-09-13 08:49:32,556 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:32,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:32,557 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2024-09-13 08:49:32,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-13 08:49:32,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:32,557 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:32,570 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 08:49:32,759 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 [2024-09-13 08:49:32,759 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:32,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:32,760 INFO L85 PathProgramCache]: Analyzing trace with hash 548739116, now seen corresponding path program 2 times [2024-09-13 08:49:32,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:32,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730723621] [2024-09-13 08:49:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:32,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:32,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:49:32,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:32,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730723621] [2024-09-13 08:49:32,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730723621] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:32,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622440869] [2024-09-13 08:49:32,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:32,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:32,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:32,839 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) [2024-09-13 08:49:32,839 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 08:49:32,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:32,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:32,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 08:49:32,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:49:32,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:49:32,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622440869] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:32,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:32,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-13 08:49:32,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201305298] [2024-09-13 08:49:32,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:32,975 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 08:49:32,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:32,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 08:49:32,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-13 08:49:32,975 INFO L87 Difference]: Start difference. First operand 44 states and 62 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:33,118 INFO L93 Difference]: Finished difference Result 96 states and 141 transitions. [2024-09-13 08:49:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 08:49:33,119 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-13 08:49:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:33,119 INFO L225 Difference]: With dead ends: 96 [2024-09-13 08:49:33,119 INFO L226 Difference]: Without dead ends: 68 [2024-09-13 08:49:33,120 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:49:33,120 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:33,120 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 103 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:33,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-13 08:49:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2024-09-13 08:49:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2024-09-13 08:49:33,138 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 21 [2024-09-13 08:49:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:33,138 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2024-09-13 08:49:33,138 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:33,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:33,139 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2024-09-13 08:49:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-13 08:49:33,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:33,139 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:33,153 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 08:49:33,340 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 08:49:33,341 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:33,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:33,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1383500575, now seen corresponding path program 3 times [2024-09-13 08:49:33,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:33,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103757250] [2024-09-13 08:49:33,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:33,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:33,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:33,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:33,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103757250] [2024-09-13 08:49:33,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103757250] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:33,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007086721] [2024-09-13 08:49:33,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:33,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:33,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:33,485 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) [2024-09-13 08:49:33,487 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 08:49:33,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-13 08:49:33,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:33,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 08:49:33,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:49:33,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:49:33,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007086721] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:33,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:33,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-09-13 08:49:33,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206377753] [2024-09-13 08:49:33,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:33,646 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 08:49:33,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:33,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 08:49:33,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-09-13 08:49:33,647 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:33,952 INFO L93 Difference]: Finished difference Result 84 states and 120 transitions. [2024-09-13 08:49:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 08:49:33,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-13 08:49:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:33,953 INFO L225 Difference]: With dead ends: 84 [2024-09-13 08:49:33,953 INFO L226 Difference]: Without dead ends: 67 [2024-09-13 08:49:33,954 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2024-09-13 08:49:33,954 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:33,955 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 119 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-13 08:49:33,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2024-09-13 08:49:33,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.368421052631579) internal successors, (78), 57 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:33,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2024-09-13 08:49:33,975 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 22 [2024-09-13 08:49:33,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:33,976 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2024-09-13 08:49:33,976 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:33,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:33,977 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2024-09-13 08:49:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-13 08:49:33,980 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:33,980 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:33,997 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 08:49:34,181 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:34,181 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:34,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:34,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1003223996, now seen corresponding path program 2 times [2024-09-13 08:49:34,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:34,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536969150] [2024-09-13 08:49:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:34,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:34,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 08:49:34,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:34,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536969150] [2024-09-13 08:49:34,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536969150] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:34,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813635759] [2024-09-13 08:49:34,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:34,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:34,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:34,277 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) [2024-09-13 08:49:34,278 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 08:49:34,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:34,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:34,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-13 08:49:34,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:34,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:49:34,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813635759] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:34,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:34,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 21 [2024-09-13 08:49:34,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790525517] [2024-09-13 08:49:34,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:34,579 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 08:49:34,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:34,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 08:49:34,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:49:34,580 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:35,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:35,227 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2024-09-13 08:49:35,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-13 08:49:35,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-09-13 08:49:35,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:35,228 INFO L225 Difference]: With dead ends: 147 [2024-09-13 08:49:35,228 INFO L226 Difference]: Without dead ends: 108 [2024-09-13 08:49:35,229 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 08:49:35,229 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:35,229 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 252 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:49:35,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-13 08:49:35,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2024-09-13 08:49:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.369047619047619) internal successors, (115), 84 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2024-09-13 08:49:35,257 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 23 [2024-09-13 08:49:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:35,257 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2024-09-13 08:49:35,257 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:35,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:35,258 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2024-09-13 08:49:35,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-13 08:49:35,258 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:35,258 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:35,275 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 08:49:35,462 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:35,462 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:35,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:35,463 INFO L85 PathProgramCache]: Analyzing trace with hash 411216348, now seen corresponding path program 4 times [2024-09-13 08:49:35,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:35,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453390649] [2024-09-13 08:49:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:35,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:35,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:35,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:35,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453390649] [2024-09-13 08:49:35,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453390649] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:35,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995858615] [2024-09-13 08:49:35,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:49:35,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:35,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:35,621 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) [2024-09-13 08:49:35,623 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 08:49:35,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:49:35,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:35,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 08:49:35,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 08:49:35,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 08:49:35,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995858615] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:35,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:35,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2024-09-13 08:49:35,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836805547] [2024-09-13 08:49:35,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:35,828 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 08:49:35,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:35,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 08:49:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:49:35,829 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:36,584 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-13 08:49:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-13 08:49:36,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-13 08:49:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:36,585 INFO L225 Difference]: With dead ends: 123 [2024-09-13 08:49:36,585 INFO L226 Difference]: Without dead ends: 96 [2024-09-13 08:49:36,586 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 08:49:36,587 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:36,587 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 139 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:49:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-13 08:49:36,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2024-09-13 08:49:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-13 08:49:36,617 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 25 [2024-09-13 08:49:36,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:36,617 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-13 08:49:36,618 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:36,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-13 08:49:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-13 08:49:36,618 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:36,618 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:36,634 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:36,822 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 08:49:36,823 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:36,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:36,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1940516302, now seen corresponding path program 3 times [2024-09-13 08:49:36,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:36,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809078398] [2024-09-13 08:49:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:36,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:49:36,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:36,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809078398] [2024-09-13 08:49:36,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809078398] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:36,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675965982] [2024-09-13 08:49:36,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:36,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:36,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:36,915 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) [2024-09-13 08:49:36,916 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 08:49:36,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 08:49:36,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:36,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 08:49:36,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:37,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:49:37,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675965982] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:37,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:37,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 24 [2024-09-13 08:49:37,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853440163] [2024-09-13 08:49:37,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:37,218 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 08:49:37,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:37,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 08:49:37,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-09-13 08:49:37,218 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:38,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:38,131 INFO L93 Difference]: Finished difference Result 171 states and 236 transitions. [2024-09-13 08:49:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-13 08:49:38,131 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-13 08:49:38,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:38,132 INFO L225 Difference]: With dead ends: 171 [2024-09-13 08:49:38,132 INFO L226 Difference]: Without dead ends: 134 [2024-09-13 08:49:38,135 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2024-09-13 08:49:38,135 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:38,135 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 246 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:49:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-13 08:49:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2024-09-13 08:49:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 96 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2024-09-13 08:49:38,159 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 25 [2024-09-13 08:49:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:38,159 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2024-09-13 08:49:38,159 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:38,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2024-09-13 08:49:38,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-13 08:49:38,160 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:38,160 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:38,173 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:38,364 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 08:49:38,365 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:38,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:38,365 INFO L85 PathProgramCache]: Analyzing trace with hash 712565185, now seen corresponding path program 4 times [2024-09-13 08:49:38,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:38,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977911868] [2024-09-13 08:49:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:38,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:38,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 08:49:38,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:38,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977911868] [2024-09-13 08:49:38,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977911868] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:38,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630102112] [2024-09-13 08:49:38,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:49:38,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:38,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:38,453 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:38,454 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 08:49:38,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:49:38,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:38,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 08:49:38,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 08:49:38,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 08:49:38,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630102112] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:38,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:38,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-13 08:49:38,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978063371] [2024-09-13 08:49:38,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:38,556 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 08:49:38,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:38,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 08:49:38,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:49:38,557 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:38,610 INFO L93 Difference]: Finished difference Result 125 states and 166 transitions. [2024-09-13 08:49:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 08:49:38,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-13 08:49:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:38,611 INFO L225 Difference]: With dead ends: 125 [2024-09-13 08:49:38,611 INFO L226 Difference]: Without dead ends: 99 [2024-09-13 08:49:38,611 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 9 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:49:38,612 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:38,612 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-13 08:49:38,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-13 08:49:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.372340425531915) internal successors, (129), 94 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2024-09-13 08:49:38,639 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 26 [2024-09-13 08:49:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:38,639 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2024-09-13 08:49:38,639 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:38,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2024-09-13 08:49:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-13 08:49:38,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:38,640 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:38,654 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:38,840 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 08:49:38,841 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:38,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:38,841 INFO L85 PathProgramCache]: Analyzing trace with hash -133051136, now seen corresponding path program 5 times [2024-09-13 08:49:38,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:38,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898006527] [2024-09-13 08:49:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:38,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:38,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-13 08:49:38,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:38,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898006527] [2024-09-13 08:49:38,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898006527] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:38,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994520859] [2024-09-13 08:49:38,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:49:38,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:38,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:38,954 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:38,955 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 08:49:39,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-13 08:49:39,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:39,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 08:49:39,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:49:39,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-13 08:49:39,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994520859] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:39,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:39,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 17 [2024-09-13 08:49:39,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519161635] [2024-09-13 08:49:39,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:39,109 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 08:49:39,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:39,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 08:49:39,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-09-13 08:49:39,110 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:39,346 INFO L93 Difference]: Finished difference Result 216 states and 305 transitions. [2024-09-13 08:49:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 08:49:39,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-13 08:49:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:39,351 INFO L225 Difference]: With dead ends: 216 [2024-09-13 08:49:39,351 INFO L226 Difference]: Without dead ends: 173 [2024-09-13 08:49:39,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2024-09-13 08:49:39,352 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:39,352 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 268 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-13 08:49:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2024-09-13 08:49:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.3055555555555556) internal successors, (141), 108 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2024-09-13 08:49:39,377 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 26 [2024-09-13 08:49:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:39,377 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2024-09-13 08:49:39,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:39,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:39,378 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2024-09-13 08:49:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-13 08:49:39,378 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:39,378 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:39,390 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:39,578 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 08:49:39,579 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:39,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:39,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1263484460, now seen corresponding path program 5 times [2024-09-13 08:49:39,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:39,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441291079] [2024-09-13 08:49:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:39,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:39,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:49:39,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:39,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441291079] [2024-09-13 08:49:39,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441291079] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:39,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735678161] [2024-09-13 08:49:39,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:49:39,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:39,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:39,684 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:39,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 08:49:39,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-13 08:49:39,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:39,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-13 08:49:39,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:39,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-13 08:49:39,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735678161] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:39,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:39,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 5] total 21 [2024-09-13 08:49:39,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079668820] [2024-09-13 08:49:39,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:39,858 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 08:49:39,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:39,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 08:49:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:49:39,859 INFO L87 Difference]: Start difference. First operand 113 states and 145 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:40,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:40,575 INFO L93 Difference]: Finished difference Result 229 states and 321 transitions. [2024-09-13 08:49:40,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-13 08:49:40,576 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-13 08:49:40,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:40,577 INFO L225 Difference]: With dead ends: 229 [2024-09-13 08:49:40,577 INFO L226 Difference]: Without dead ends: 204 [2024-09-13 08:49:40,578 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 08:49:40,578 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 44 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:40,578 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 319 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:49:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-09-13 08:49:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2024-09-13 08:49:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.3203125) internal successors, (169), 128 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2024-09-13 08:49:40,624 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 27 [2024-09-13 08:49:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:40,624 INFO L474 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2024-09-13 08:49:40,624 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:40,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:40,625 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2024-09-13 08:49:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-13 08:49:40,625 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:40,625 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:40,639 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:40,828 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-13 08:49:40,829 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:40,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:40,829 INFO L85 PathProgramCache]: Analyzing trace with hash -695293183, now seen corresponding path program 6 times [2024-09-13 08:49:40,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:40,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949216104] [2024-09-13 08:49:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:40,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:40,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:40,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:40,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949216104] [2024-09-13 08:49:40,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949216104] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:40,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615976687] [2024-09-13 08:49:40,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:49:40,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:40,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:40,986 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:40,987 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 08:49:41,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-13 08:49:41,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:41,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 08:49:41,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-13 08:49:41,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-13 08:49:41,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615976687] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:41,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:41,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-13 08:49:41,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475976105] [2024-09-13 08:49:41,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:41,235 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 08:49:41,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 08:49:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2024-09-13 08:49:41,236 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:42,419 INFO L93 Difference]: Finished difference Result 200 states and 273 transitions. [2024-09-13 08:49:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-09-13 08:49:42,419 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-13 08:49:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:42,420 INFO L225 Difference]: With dead ends: 200 [2024-09-13 08:49:42,420 INFO L226 Difference]: Without dead ends: 170 [2024-09-13 08:49:42,423 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=440, Invalid=4962, Unknown=0, NotChecked=0, Total=5402 [2024-09-13 08:49:42,424 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:42,424 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 168 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:49:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-13 08:49:42,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 147. [2024-09-13 08:49:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.3028169014084507) internal successors, (185), 142 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2024-09-13 08:49:42,475 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 28 [2024-09-13 08:49:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:42,475 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2024-09-13 08:49:42,475 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:42,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:42,476 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2024-09-13 08:49:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-13 08:49:42,476 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:42,476 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:42,488 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 08:49:42,680 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:42,680 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:42,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2037353101, now seen corresponding path program 6 times [2024-09-13 08:49:42,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:42,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378913596] [2024-09-13 08:49:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:42,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 08:49:42,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:42,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378913596] [2024-09-13 08:49:42,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378913596] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:42,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695175021] [2024-09-13 08:49:42,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:49:42,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:42,772 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:42,773 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 08:49:42,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-13 08:49:42,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:42,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 08:49:42,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 08:49:42,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 08:49:42,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695175021] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:42,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:42,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-13 08:49:42,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586267195] [2024-09-13 08:49:42,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:42,882 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 08:49:42,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:42,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 08:49:42,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-13 08:49:42,883 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:42,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:42,975 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2024-09-13 08:49:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 08:49:42,976 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-13 08:49:42,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:42,976 INFO L225 Difference]: With dead ends: 165 [2024-09-13 08:49:42,977 INFO L226 Difference]: Without dead ends: 151 [2024-09-13 08:49:42,977 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-13 08:49:42,977 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:42,977 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-13 08:49:43,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-09-13 08:49:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.2876712328767124) internal successors, (188), 146 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 192 transitions. [2024-09-13 08:49:43,029 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 192 transitions. Word has length 29 [2024-09-13 08:49:43,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:43,029 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 192 transitions. [2024-09-13 08:49:43,029 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:43,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:43,029 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 192 transitions. [2024-09-13 08:49:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-13 08:49:43,029 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:43,030 INFO L216 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:43,049 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-13 08:49:43,230 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:43,230 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:43,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:43,230 INFO L85 PathProgramCache]: Analyzing trace with hash 947704670, now seen corresponding path program 7 times [2024-09-13 08:49:43,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:43,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90305256] [2024-09-13 08:49:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:43,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:43,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 08:49:43,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:43,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90305256] [2024-09-13 08:49:43,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90305256] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:43,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221542637] [2024-09-13 08:49:43,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:49:43,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:43,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:43,360 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:43,361 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 08:49:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:43,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-13 08:49:43,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:43,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-13 08:49:43,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221542637] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:43,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:43,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 8] total 23 [2024-09-13 08:49:43,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844317463] [2024-09-13 08:49:43,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:43,586 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 08:49:43,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:43,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 08:49:43,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-09-13 08:49:43,586 INFO L87 Difference]: Start difference. First operand 151 states and 192 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:44,624 INFO L93 Difference]: Finished difference Result 302 states and 406 transitions. [2024-09-13 08:49:44,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-13 08:49:44,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-13 08:49:44,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:44,625 INFO L225 Difference]: With dead ends: 302 [2024-09-13 08:49:44,625 INFO L226 Difference]: Without dead ends: 254 [2024-09-13 08:49:44,626 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=564, Invalid=3596, Unknown=0, NotChecked=0, Total=4160 [2024-09-13 08:49:44,627 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 59 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:44,627 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 481 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:49:44,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-13 08:49:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 155. [2024-09-13 08:49:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.2866666666666666) internal successors, (193), 150 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 197 transitions. [2024-09-13 08:49:44,686 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 197 transitions. Word has length 29 [2024-09-13 08:49:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:44,686 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 197 transitions. [2024-09-13 08:49:44,686 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:44,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 197 transitions. [2024-09-13 08:49:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 08:49:44,687 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:44,687 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:44,703 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:44,888 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:44,888 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:44,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1065772992, now seen corresponding path program 2 times [2024-09-13 08:49:44,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:44,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437578523] [2024-09-13 08:49:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:44,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:45,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 08:49:45,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:45,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437578523] [2024-09-13 08:49:45,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437578523] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:45,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755710932] [2024-09-13 08:49:45,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:45,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:45,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:45,028 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:45,032 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 08:49:45,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:45,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:45,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 08:49:45,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-13 08:49:45,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-13 08:49:45,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755710932] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:45,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:45,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-13 08:49:45,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174416651] [2024-09-13 08:49:45,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:45,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 08:49:45,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 08:49:45,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-09-13 08:49:45,299 INFO L87 Difference]: Start difference. First operand 155 states and 197 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:46,157 INFO L93 Difference]: Finished difference Result 231 states and 297 transitions. [2024-09-13 08:49:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-13 08:49:46,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-13 08:49:46,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:46,160 INFO L225 Difference]: With dead ends: 231 [2024-09-13 08:49:46,160 INFO L226 Difference]: Without dead ends: 197 [2024-09-13 08:49:46,161 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=338, Invalid=2418, Unknown=0, NotChecked=0, Total=2756 [2024-09-13 08:49:46,161 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:46,161 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 322 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:49:46,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-13 08:49:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 149. [2024-09-13 08:49:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.2638888888888888) internal successors, (182), 144 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 186 transitions. [2024-09-13 08:49:46,207 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 186 transitions. Word has length 30 [2024-09-13 08:49:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:46,207 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 186 transitions. [2024-09-13 08:49:46,207 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:46,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 186 transitions. [2024-09-13 08:49:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 08:49:46,207 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:46,207 INFO L216 NwaCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:46,219 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:46,408 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:46,408 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:46,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash -850750864, now seen corresponding path program 8 times [2024-09-13 08:49:46,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:46,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585005906] [2024-09-13 08:49:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:46,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:46,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:46,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:49:46,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:46,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585005906] [2024-09-13 08:49:46,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585005906] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:46,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137272827] [2024-09-13 08:49:46,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:46,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:46,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:46,531 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:46,533 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 08:49:46,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:46,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:46,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-13 08:49:46,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:46,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:49:46,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137272827] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:46,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:46,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 12] total 30 [2024-09-13 08:49:46,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030820447] [2024-09-13 08:49:46,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:46,884 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 08:49:46,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:46,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 08:49:46,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2024-09-13 08:49:46,885 INFO L87 Difference]: Start difference. First operand 149 states and 186 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:48,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:48,693 INFO L93 Difference]: Finished difference Result 324 states and 427 transitions. [2024-09-13 08:49:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-09-13 08:49:48,693 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-13 08:49:48,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:48,695 INFO L225 Difference]: With dead ends: 324 [2024-09-13 08:49:48,695 INFO L226 Difference]: Without dead ends: 249 [2024-09-13 08:49:48,696 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=748, Invalid=6392, Unknown=0, NotChecked=0, Total=7140 [2024-09-13 08:49:48,697 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:48,697 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 596 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:49:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-09-13 08:49:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 171. [2024-09-13 08:49:48,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.3253012048192772) internal successors, (220), 166 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 224 transitions. [2024-09-13 08:49:48,754 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 224 transitions. Word has length 30 [2024-09-13 08:49:48,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:48,754 INFO L474 AbstractCegarLoop]: Abstraction has 171 states and 224 transitions. [2024-09-13 08:49:48,754 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:48,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 224 transitions. [2024-09-13 08:49:48,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 08:49:48,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:48,754 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:48,767 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-13 08:49:48,955 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-13 08:49:48,955 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:48,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1118269741, now seen corresponding path program 9 times [2024-09-13 08:49:48,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:48,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771631309] [2024-09-13 08:49:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:48,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:49,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 08:49:49,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771631309] [2024-09-13 08:49:49,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771631309] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61778493] [2024-09-13 08:49:49,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:49,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:49,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:49,061 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:49,064 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 08:49:49,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 08:49:49,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:49,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 08:49:49,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 08:49:49,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 08:49:49,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61778493] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:49,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:49,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-13 08:49:49,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81068898] [2024-09-13 08:49:49,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:49,171 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 08:49:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 08:49:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-13 08:49:49,172 INFO L87 Difference]: Start difference. First operand 171 states and 224 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:49,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:49,248 INFO L93 Difference]: Finished difference Result 187 states and 244 transitions. [2024-09-13 08:49:49,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 08:49:49,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-13 08:49:49,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:49,250 INFO L225 Difference]: With dead ends: 187 [2024-09-13 08:49:49,250 INFO L226 Difference]: Without dead ends: 159 [2024-09-13 08:49:49,250 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-13 08:49:49,251 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:49,251 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 90 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:49,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-13 08:49:49,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2024-09-13 08:49:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.3376623376623376) internal successors, (206), 154 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2024-09-13 08:49:49,306 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 31 [2024-09-13 08:49:49,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:49,306 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2024-09-13 08:49:49,306 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:49,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:49,306 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2024-09-13 08:49:49,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 08:49:49,307 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:49,307 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:49,319 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:49,510 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-13 08:49:49,511 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:49,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash -502026436, now seen corresponding path program 7 times [2024-09-13 08:49:49,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:49,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118692048] [2024-09-13 08:49:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:49,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:49,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:49,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:49,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118692048] [2024-09-13 08:49:49,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118692048] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:49,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64173760] [2024-09-13 08:49:49,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:49:49,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:49,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:49,679 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:49,680 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 08:49:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:49,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 08:49:49,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-13 08:49:49,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-13 08:49:49,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64173760] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:49,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:49,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2024-09-13 08:49:49,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836236117] [2024-09-13 08:49:49,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:49,955 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-13 08:49:49,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-13 08:49:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-09-13 08:49:49,956 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:51,026 INFO L93 Difference]: Finished difference Result 537 states and 812 transitions. [2024-09-13 08:49:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-09-13 08:49:51,027 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-13 08:49:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:51,029 INFO L225 Difference]: With dead ends: 537 [2024-09-13 08:49:51,029 INFO L226 Difference]: Without dead ends: 485 [2024-09-13 08:49:51,030 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=967, Invalid=3863, Unknown=0, NotChecked=0, Total=4830 [2024-09-13 08:49:51,031 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:51,031 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 405 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:49:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2024-09-13 08:49:51,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 235. [2024-09-13 08:49:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4086956521739131) internal successors, (324), 230 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 328 transitions. [2024-09-13 08:49:51,109 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 328 transitions. Word has length 31 [2024-09-13 08:49:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:51,109 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 328 transitions. [2024-09-13 08:49:51,110 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:51,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 328 transitions. [2024-09-13 08:49:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 08:49:51,110 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:51,110 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:51,123 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-13 08:49:51,314 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-13 08:49:51,314 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:51,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash -737150836, now seen corresponding path program 10 times [2024-09-13 08:49:51,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:51,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722178606] [2024-09-13 08:49:51,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:51,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:51,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:49:51,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:51,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722178606] [2024-09-13 08:49:51,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722178606] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:51,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335564804] [2024-09-13 08:49:51,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:49:51,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:51,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:51,457 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:51,458 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-13 08:49:51,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:49:51,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:51,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 08:49:51,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:49:51,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:49:51,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335564804] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:51,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:51,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-13 08:49:51,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659656304] [2024-09-13 08:49:51,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:51,598 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 08:49:51,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:51,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 08:49:51,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-09-13 08:49:51,599 INFO L87 Difference]: Start difference. First operand 235 states and 328 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:55,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:49:55,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:55,993 INFO L93 Difference]: Finished difference Result 462 states and 718 transitions. [2024-09-13 08:49:55,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 08:49:55,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-13 08:49:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:55,997 INFO L225 Difference]: With dead ends: 462 [2024-09-13 08:49:55,997 INFO L226 Difference]: Without dead ends: 423 [2024-09-13 08:49:55,998 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2024-09-13 08:49:55,998 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:55,998 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 169 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 122 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-09-13 08:49:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-09-13 08:49:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 333. [2024-09-13 08:49:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.4695121951219512) internal successors, (482), 328 states have internal predecessors, (482), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 486 transitions. [2024-09-13 08:49:56,126 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 486 transitions. Word has length 33 [2024-09-13 08:49:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:56,126 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 486 transitions. [2024-09-13 08:49:56,126 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:56,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 486 transitions. [2024-09-13 08:49:56,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-13 08:49:56,127 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:56,127 INFO L216 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:56,139 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:56,327 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-13 08:49:56,328 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:56,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1047726976, now seen corresponding path program 11 times [2024-09-13 08:49:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:56,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270985300] [2024-09-13 08:49:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:56,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:56,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 08:49:56,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:56,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270985300] [2024-09-13 08:49:56,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270985300] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:56,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533868717] [2024-09-13 08:49:56,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:49:56,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:56,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:56,486 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:56,487 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-13 08:49:56,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-13 08:49:56,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:56,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-13 08:49:56,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 08:49:56,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-13 08:49:56,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533868717] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:56,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:56,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 8] total 24 [2024-09-13 08:49:56,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833227739] [2024-09-13 08:49:56,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:56,716 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 08:49:56,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:56,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 08:49:56,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-09-13 08:49:56,716 INFO L87 Difference]: Start difference. First operand 333 states and 486 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:57,681 INFO L93 Difference]: Finished difference Result 676 states and 984 transitions. [2024-09-13 08:49:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-13 08:49:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-13 08:49:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:57,684 INFO L225 Difference]: With dead ends: 676 [2024-09-13 08:49:57,684 INFO L226 Difference]: Without dead ends: 511 [2024-09-13 08:49:57,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=305, Invalid=2451, Unknown=0, NotChecked=0, Total=2756 [2024-09-13 08:49:57,686 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 71 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:57,686 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 581 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:49:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-09-13 08:49:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 367. [2024-09-13 08:49:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 362 states have (on average 1.4116022099447514) internal successors, (511), 362 states have internal predecessors, (511), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 515 transitions. [2024-09-13 08:49:57,822 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 515 transitions. Word has length 34 [2024-09-13 08:49:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:57,822 INFO L474 AbstractCegarLoop]: Abstraction has 367 states and 515 transitions. [2024-09-13 08:49:57,822 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:57,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 515 transitions. [2024-09-13 08:49:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 08:49:57,823 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:57,823 INFO L216 NwaCegarLoop]: trace histogram [10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:57,836 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:58,027 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-13 08:49:58,027 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:58,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash 513042476, now seen corresponding path program 12 times [2024-09-13 08:49:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:58,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973132966] [2024-09-13 08:49:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:58,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:58,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:49:58,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973132966] [2024-09-13 08:49:58,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973132966] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501746549] [2024-09-13 08:49:58,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:49:58,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:58,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:58,188 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:49:58,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-13 08:49:58,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 08:49:58,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:58,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 08:49:58,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-13 08:49:58,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-13 08:49:58,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501746549] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:58,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:58,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 10] total 30 [2024-09-13 08:49:58,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25042027] [2024-09-13 08:49:58,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:58,546 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 08:49:58,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:58,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 08:49:58,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-13 08:49:58,547 INFO L87 Difference]: Start difference. First operand 367 states and 515 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:00,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:00,595 INFO L93 Difference]: Finished difference Result 742 states and 1046 transitions. [2024-09-13 08:50:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-13 08:50:00,595 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2024-09-13 08:50:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:00,598 INFO L225 Difference]: With dead ends: 742 [2024-09-13 08:50:00,598 INFO L226 Difference]: Without dead ends: 595 [2024-09-13 08:50:00,599 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1068, Invalid=6942, Unknown=0, NotChecked=0, Total=8010 [2024-09-13 08:50:00,600 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 210 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:00,600 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 686 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 08:50:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2024-09-13 08:50:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 383. [2024-09-13 08:50:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.3862433862433863) internal successors, (524), 378 states have internal predecessors, (524), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 528 transitions. [2024-09-13 08:50:00,752 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 528 transitions. Word has length 35 [2024-09-13 08:50:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:00,753 INFO L474 AbstractCegarLoop]: Abstraction has 383 states and 528 transitions. [2024-09-13 08:50:00,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:00,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 528 transitions. [2024-09-13 08:50:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 08:50:00,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:00,754 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:00,769 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-13 08:50:00,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-13 08:50:00,954 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:00,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1273319442, now seen corresponding path program 3 times [2024-09-13 08:50:00,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:00,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527790909] [2024-09-13 08:50:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:00,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:01,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-13 08:50:01,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:01,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527790909] [2024-09-13 08:50:01,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527790909] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:01,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116955070] [2024-09-13 08:50:01,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:50:01,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:01,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:01,134 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:50:01,135 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-13 08:50:01,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 08:50:01,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:01,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:50:01,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-13 08:50:01,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-13 08:50:01,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116955070] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:01,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:01,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-09-13 08:50:01,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833950513] [2024-09-13 08:50:01,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:01,516 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 08:50:01,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:01,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 08:50:01,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-13 08:50:01,518 INFO L87 Difference]: Start difference. First operand 383 states and 528 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:03,294 INFO L93 Difference]: Finished difference Result 812 states and 1129 transitions. [2024-09-13 08:50:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-09-13 08:50:03,295 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-13 08:50:03,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:03,297 INFO L225 Difference]: With dead ends: 812 [2024-09-13 08:50:03,297 INFO L226 Difference]: Without dead ends: 735 [2024-09-13 08:50:03,298 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1589, Invalid=6243, Unknown=0, NotChecked=0, Total=7832 [2024-09-13 08:50:03,299 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 209 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:03,299 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 374 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:50:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-09-13 08:50:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 436. [2024-09-13 08:50:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 431 states have (on average 1.382830626450116) internal successors, (596), 431 states have internal predecessors, (596), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:03,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 600 transitions. [2024-09-13 08:50:03,474 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 600 transitions. Word has length 36 [2024-09-13 08:50:03,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:03,474 INFO L474 AbstractCegarLoop]: Abstraction has 436 states and 600 transitions. [2024-09-13 08:50:03,475 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:03,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 600 transitions. [2024-09-13 08:50:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 08:50:03,476 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:03,476 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:03,488 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-13 08:50:03,676 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-13 08:50:03,677 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:03,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:03,677 INFO L85 PathProgramCache]: Analyzing trace with hash 771129250, now seen corresponding path program 13 times [2024-09-13 08:50:03,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:03,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742473946] [2024-09-13 08:50:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:03,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:03,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:50:03,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:03,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742473946] [2024-09-13 08:50:03,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742473946] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:03,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561062153] [2024-09-13 08:50:03,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:50:03,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:03,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:03,880 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:50:03,882 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-13 08:50:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:03,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-13 08:50:03,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:50:04,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:50:04,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561062153] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:04,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:04,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2024-09-13 08:50:04,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768156696] [2024-09-13 08:50:04,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:04,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 08:50:04,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 08:50:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-09-13 08:50:04,083 INFO L87 Difference]: Start difference. First operand 436 states and 600 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:08,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:50:16,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:50:24,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:50:24,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:24,727 INFO L93 Difference]: Finished difference Result 629 states and 870 transitions. [2024-09-13 08:50:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 08:50:24,727 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-13 08:50:24,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:24,730 INFO L225 Difference]: With dead ends: 629 [2024-09-13 08:50:24,730 INFO L226 Difference]: Without dead ends: 611 [2024-09-13 08:50:24,730 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=189, Invalid=621, Unknown=2, NotChecked=0, Total=812 [2024-09-13 08:50:24,730 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:24,731 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 172 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 193 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2024-09-13 08:50:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2024-09-13 08:50:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 476. [2024-09-13 08:50:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 1.3736730360934182) internal successors, (647), 471 states have internal predecessors, (647), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 651 transitions. [2024-09-13 08:50:24,954 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 651 transitions. Word has length 38 [2024-09-13 08:50:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:24,954 INFO L474 AbstractCegarLoop]: Abstraction has 476 states and 651 transitions. [2024-09-13 08:50:24,954 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:24,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 651 transitions. [2024-09-13 08:50:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 08:50:24,955 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:24,955 INFO L216 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:24,971 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-13 08:50:25,156 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:25,156 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:25,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1102958530, now seen corresponding path program 14 times [2024-09-13 08:50:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:25,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980727977] [2024-09-13 08:50:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:25,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:25,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 08:50:25,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:25,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980727977] [2024-09-13 08:50:25,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980727977] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:25,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449727335] [2024-09-13 08:50:25,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:50:25,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:25,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:25,350 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:50:25,351 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-13 08:50:25,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:50:25,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:25,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-13 08:50:25,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:25,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 08:50:25,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449727335] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:25,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:25,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 17] total 45 [2024-09-13 08:50:25,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608785677] [2024-09-13 08:50:25,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:25,999 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-13 08:50:25,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-13 08:50:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1649, Unknown=0, NotChecked=0, Total=1980 [2024-09-13 08:50:26,000 INFO L87 Difference]: Start difference. First operand 476 states and 651 transitions. Second operand has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:29,504 INFO L93 Difference]: Finished difference Result 1019 states and 1392 transitions. [2024-09-13 08:50:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-09-13 08:50:29,505 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-13 08:50:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:29,507 INFO L225 Difference]: With dead ends: 1019 [2024-09-13 08:50:29,507 INFO L226 Difference]: Without dead ends: 779 [2024-09-13 08:50:29,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3516 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1601, Invalid=10389, Unknown=0, NotChecked=0, Total=11990 [2024-09-13 08:50:29,509 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 92 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 2263 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 2614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:29,509 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1304 Invalid, 2614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 08:50:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2024-09-13 08:50:29,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 468. [2024-09-13 08:50:29,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 463 states have (on average 1.408207343412527) internal successors, (652), 463 states have internal predecessors, (652), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 656 transitions. [2024-09-13 08:50:29,786 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 656 transitions. Word has length 38 [2024-09-13 08:50:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:29,786 INFO L474 AbstractCegarLoop]: Abstraction has 468 states and 656 transitions. [2024-09-13 08:50:29,786 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:29,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 656 transitions. [2024-09-13 08:50:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-13 08:50:29,787 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:29,787 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:29,799 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-13 08:50:29,987 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:29,988 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:29,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:29,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1715821890, now seen corresponding path program 4 times [2024-09-13 08:50:29,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:29,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897908161] [2024-09-13 08:50:29,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:29,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:30,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-13 08:50:30,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:30,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897908161] [2024-09-13 08:50:30,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897908161] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:30,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86815583] [2024-09-13 08:50:30,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:50:30,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:30,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:30,203 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:50:30,204 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-13 08:50:30,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:50:30,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:30,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-13 08:50:30,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-13 08:50:30,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-13 08:50:30,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86815583] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:30,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:30,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2024-09-13 08:50:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396302260] [2024-09-13 08:50:30,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:30,624 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-13 08:50:30,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:30,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-13 08:50:30,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 08:50:30,624 INFO L87 Difference]: Start difference. First operand 468 states and 656 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:33,886 INFO L93 Difference]: Finished difference Result 1176 states and 1620 transitions. [2024-09-13 08:50:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-13 08:50:33,887 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-09-13 08:50:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:33,890 INFO L225 Difference]: With dead ends: 1176 [2024-09-13 08:50:33,890 INFO L226 Difference]: Without dead ends: 1076 [2024-09-13 08:50:33,891 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3892 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2517, Invalid=10823, Unknown=0, NotChecked=0, Total=13340 [2024-09-13 08:50:33,892 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 231 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:33,892 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 542 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 08:50:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2024-09-13 08:50:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 537. [2024-09-13 08:50:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 532 states have (on average 1.3966165413533835) internal successors, (743), 532 states have internal predecessors, (743), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 747 transitions. [2024-09-13 08:50:34,240 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 747 transitions. Word has length 39 [2024-09-13 08:50:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:34,240 INFO L474 AbstractCegarLoop]: Abstraction has 537 states and 747 transitions. [2024-09-13 08:50:34,240 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:34,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 747 transitions. [2024-09-13 08:50:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 08:50:34,241 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:34,241 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:34,253 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-13 08:50:34,444 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:34,444 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:34,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:34,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1752322643, now seen corresponding path program 15 times [2024-09-13 08:50:34,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:34,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321115551] [2024-09-13 08:50:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:34,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:34,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:50:34,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:34,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321115551] [2024-09-13 08:50:34,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321115551] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:34,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086043107] [2024-09-13 08:50:34,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:50:34,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:34,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:34,569 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:50:34,570 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-13 08:50:34,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 08:50:34,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:34,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-13 08:50:34,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:50:34,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:50:34,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086043107] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:34,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:34,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2024-09-13 08:50:34,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461110530] [2024-09-13 08:50:34,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:34,731 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 08:50:34,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:34,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 08:50:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:50:34,732 INFO L87 Difference]: Start difference. First operand 537 states and 747 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:35,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:35,161 INFO L93 Difference]: Finished difference Result 616 states and 847 transitions. [2024-09-13 08:50:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 08:50:35,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-13 08:50:35,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:35,164 INFO L225 Difference]: With dead ends: 616 [2024-09-13 08:50:35,164 INFO L226 Difference]: Without dead ends: 568 [2024-09-13 08:50:35,164 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 15 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:50:35,164 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:35,165 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 130 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:50:35,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-09-13 08:50:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 523. [2024-09-13 08:50:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 518 states have (on average 1.4054054054054055) internal successors, (728), 518 states have internal predecessors, (728), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 732 transitions. [2024-09-13 08:50:35,509 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 732 transitions. Word has length 41 [2024-09-13 08:50:35,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:35,509 INFO L474 AbstractCegarLoop]: Abstraction has 523 states and 732 transitions. [2024-09-13 08:50:35,509 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:35,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:35,509 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 732 transitions. [2024-09-13 08:50:35,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 08:50:35,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:35,510 INFO L216 NwaCegarLoop]: trace histogram [12, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:35,523 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-13 08:50:35,714 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-13 08:50:35,715 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:35,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:35,715 INFO L85 PathProgramCache]: Analyzing trace with hash 846902028, now seen corresponding path program 16 times [2024-09-13 08:50:35,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:35,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747260480] [2024-09-13 08:50:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:35,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:35,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:50:35,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:35,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747260480] [2024-09-13 08:50:35,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747260480] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:35,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50496454] [2024-09-13 08:50:35,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:50:35,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:35,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:35,964 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:50:35,968 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-13 08:50:36,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:50:36,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:36,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-13 08:50:36,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 08:50:36,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-13 08:50:36,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50496454] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:36,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:36,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 10] total 32 [2024-09-13 08:50:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85649382] [2024-09-13 08:50:36,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:36,233 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 08:50:36,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 08:50:36,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2024-09-13 08:50:36,234 INFO L87 Difference]: Start difference. First operand 523 states and 732 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:37,795 INFO L93 Difference]: Finished difference Result 1216 states and 1685 transitions. [2024-09-13 08:50:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-13 08:50:37,796 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-13 08:50:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:37,799 INFO L225 Difference]: With dead ends: 1216 [2024-09-13 08:50:37,799 INFO L226 Difference]: Without dead ends: 972 [2024-09-13 08:50:37,799 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2024-09-13 08:50:37,800 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 205 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:37,800 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 753 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:50:37,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2024-09-13 08:50:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 584. [2024-09-13 08:50:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 579 states have (on average 1.3523316062176165) internal successors, (783), 579 states have internal predecessors, (783), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 787 transitions. [2024-09-13 08:50:38,169 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 787 transitions. Word has length 41 [2024-09-13 08:50:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:38,169 INFO L474 AbstractCegarLoop]: Abstraction has 584 states and 787 transitions. [2024-09-13 08:50:38,169 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:38,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 787 transitions. [2024-09-13 08:50:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 08:50:38,170 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:38,170 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:38,182 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-13 08:50:38,370 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-13 08:50:38,370 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:38,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash 706640914, now seen corresponding path program 5 times [2024-09-13 08:50:38,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:38,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079198972] [2024-09-13 08:50:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:38,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:38,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:38,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:38,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079198972] [2024-09-13 08:50:38,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079198972] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:38,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732069834] [2024-09-13 08:50:38,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:50:38,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:38,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:38,614 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:50:38,615 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-13 08:50:38,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-13 08:50:38,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:38,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-13 08:50:38,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:50:38,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:50:39,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732069834] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:39,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:39,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2024-09-13 08:50:39,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935420603] [2024-09-13 08:50:39,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:39,236 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 08:50:39,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:39,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 08:50:39,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2024-09-13 08:50:39,236 INFO L87 Difference]: Start difference. First operand 584 states and 787 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:44,860 INFO L93 Difference]: Finished difference Result 1001 states and 1353 transitions. [2024-09-13 08:50:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2024-09-13 08:50:44,860 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-13 08:50:44,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:44,863 INFO L225 Difference]: With dead ends: 1001 [2024-09-13 08:50:44,863 INFO L226 Difference]: Without dead ends: 893 [2024-09-13 08:50:44,865 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 72 SyntacticMatches, 16 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10193 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1557, Invalid=28199, Unknown=0, NotChecked=0, Total=29756 [2024-09-13 08:50:44,865 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:44,865 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 285 Invalid, 3927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3704 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-13 08:50:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2024-09-13 08:50:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 552. [2024-09-13 08:50:45,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 547 states have (on average 1.3345521023765996) internal successors, (730), 547 states have internal predecessors, (730), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 734 transitions. [2024-09-13 08:50:45,268 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 734 transitions. Word has length 42 [2024-09-13 08:50:45,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:45,268 INFO L474 AbstractCegarLoop]: Abstraction has 552 states and 734 transitions. [2024-09-13 08:50:45,268 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:45,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 734 transitions. [2024-09-13 08:50:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 08:50:45,269 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:45,269 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:45,281 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-13 08:50:45,469 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-13 08:50:45,470 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:45,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:45,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1382511156, now seen corresponding path program 17 times [2024-09-13 08:50:45,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:45,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989528765] [2024-09-13 08:50:45,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:45,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:45,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:50:45,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:45,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989528765] [2024-09-13 08:50:45,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989528765] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:45,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936700791] [2024-09-13 08:50:45,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:50:45,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:45,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:45,735 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:50:45,737 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-13 08:50:45,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-13 08:50:45,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:45,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 08:50:45,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-13 08:50:45,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-13 08:50:45,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936700791] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:45,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:45,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2024-09-13 08:50:45,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539486227] [2024-09-13 08:50:45,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:45,958 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 08:50:45,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:45,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 08:50:45,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:50:45,959 INFO L87 Difference]: Start difference. First operand 552 states and 734 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:50,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:50:58,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:51:06,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:51:14,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:51:18,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:51:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:19,229 INFO L93 Difference]: Finished difference Result 891 states and 1231 transitions. [2024-09-13 08:51:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-13 08:51:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-13 08:51:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:19,233 INFO L225 Difference]: With dead ends: 891 [2024-09-13 08:51:19,233 INFO L226 Difference]: Without dead ends: 860 [2024-09-13 08:51:19,233 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=344, Invalid=1293, Unknown=3, NotChecked=0, Total=1640 [2024-09-13 08:51:19,233 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 39 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:19,233 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 188 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 232 Invalid, 5 Unknown, 0 Unchecked, 20.2s Time] [2024-09-13 08:51:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2024-09-13 08:51:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 690. [2024-09-13 08:51:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 685 states have (on average 1.3620437956204379) internal successors, (933), 685 states have internal predecessors, (933), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 937 transitions. [2024-09-13 08:51:19,773 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 937 transitions. Word has length 43 [2024-09-13 08:51:19,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:19,773 INFO L474 AbstractCegarLoop]: Abstraction has 690 states and 937 transitions. [2024-09-13 08:51:19,773 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:19,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:19,773 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 937 transitions. [2024-09-13 08:51:19,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 08:51:19,774 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:19,774 INFO L216 NwaCegarLoop]: trace histogram [13, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:19,787 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-13 08:51:19,975 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-13 08:51:19,975 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:19,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash 764816386, now seen corresponding path program 18 times [2024-09-13 08:51:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:19,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056244152] [2024-09-13 08:51:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:20,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:51:20,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:20,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056244152] [2024-09-13 08:51:20,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056244152] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:20,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749000150] [2024-09-13 08:51:20,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:51:20,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:20,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:20,233 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:51:20,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-13 08:51:20,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-13 08:51:20,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:51:20,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:51:20,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-13 08:51:20,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-13 08:51:20,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749000150] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:20,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:20,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 32 [2024-09-13 08:51:20,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460309121] [2024-09-13 08:51:20,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:20,704 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 08:51:20,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:20,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 08:51:20,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2024-09-13 08:51:20,704 INFO L87 Difference]: Start difference. First operand 690 states and 937 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:24,686 INFO L93 Difference]: Finished difference Result 1431 states and 1953 transitions. [2024-09-13 08:51:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2024-09-13 08:51:24,687 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-13 08:51:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:24,690 INFO L225 Difference]: With dead ends: 1431 [2024-09-13 08:51:24,690 INFO L226 Difference]: Without dead ends: 1020 [2024-09-13 08:51:24,691 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1009, Invalid=13997, Unknown=0, NotChecked=0, Total=15006 [2024-09-13 08:51:24,692 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 138 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:24,692 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1186 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 08:51:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2024-09-13 08:51:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 633. [2024-09-13 08:51:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 628 states have (on average 1.372611464968153) internal successors, (862), 628 states have internal predecessors, (862), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 866 transitions. [2024-09-13 08:51:25,211 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 866 transitions. Word has length 44 [2024-09-13 08:51:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:25,211 INFO L474 AbstractCegarLoop]: Abstraction has 633 states and 866 transitions. [2024-09-13 08:51:25,211 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:25,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 866 transitions. [2024-09-13 08:51:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-13 08:51:25,212 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:25,212 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:25,225 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-13 08:51:25,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-13 08:51:25,416 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:25,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:25,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1388997645, now seen corresponding path program 6 times [2024-09-13 08:51:25,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:25,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590267553] [2024-09-13 08:51:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:25,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:25,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:51:25,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:25,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590267553] [2024-09-13 08:51:25,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590267553] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:25,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448047646] [2024-09-13 08:51:25,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:51:25,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:25,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:25,767 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:51:25,768 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-13 08:51:25,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-13 08:51:25,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:51:25,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-13 08:51:25,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-13 08:51:26,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-13 08:51:26,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448047646] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:26,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:26,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2024-09-13 08:51:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890399035] [2024-09-13 08:51:26,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:26,505 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-13 08:51:26,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:26,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-13 08:51:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=989, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 08:51:26,505 INFO L87 Difference]: Start difference. First operand 633 states and 866 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:36,289 INFO L93 Difference]: Finished difference Result 1095 states and 1487 transitions. [2024-09-13 08:51:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2024-09-13 08:51:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-13 08:51:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:36,292 INFO L225 Difference]: With dead ends: 1095 [2024-09-13 08:51:36,292 INFO L226 Difference]: Without dead ends: 981 [2024-09-13 08:51:36,295 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 76 SyntacticMatches, 18 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18795 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2342, Invalid=48960, Unknown=0, NotChecked=0, Total=51302 [2024-09-13 08:51:36,295 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 330 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 5338 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 5338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:36,295 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 351 Invalid, 5638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 5338 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-13 08:51:36,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2024-09-13 08:51:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 653. [2024-09-13 08:51:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 648 states have (on average 1.3503086419753085) internal successors, (875), 648 states have internal predecessors, (875), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 879 transitions. [2024-09-13 08:51:36,857 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 879 transitions. Word has length 45 [2024-09-13 08:51:36,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:36,857 INFO L474 AbstractCegarLoop]: Abstraction has 653 states and 879 transitions. [2024-09-13 08:51:36,857 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:36,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 879 transitions. [2024-09-13 08:51:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-13 08:51:36,860 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:36,860 INFO L216 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:36,872 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-13 08:51:37,063 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-13 08:51:37,063 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:37,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2100972460, now seen corresponding path program 19 times [2024-09-13 08:51:37,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:37,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106639973] [2024-09-13 08:51:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:37,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:37,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:51:37,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:37,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106639973] [2024-09-13 08:51:37,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106639973] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:37,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409574260] [2024-09-13 08:51:37,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:51:37,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:37,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:37,308 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:51:37,309 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-13 08:51:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:37,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-13 08:51:37,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:51:37,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-13 08:51:37,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409574260] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:37,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:37,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 14] total 39 [2024-09-13 08:51:37,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846326332] [2024-09-13 08:51:37,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:37,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-13 08:51:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:37,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-13 08:51:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2024-09-13 08:51:37,747 INFO L87 Difference]: Start difference. First operand 653 states and 879 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:42,737 INFO L93 Difference]: Finished difference Result 1398 states and 1905 transitions. [2024-09-13 08:51:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-09-13 08:51:42,737 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-13 08:51:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:42,741 INFO L225 Difference]: With dead ends: 1398 [2024-09-13 08:51:42,741 INFO L226 Difference]: Without dead ends: 1092 [2024-09-13 08:51:42,742 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4609 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1037, Invalid=15475, Unknown=0, NotChecked=0, Total=16512 [2024-09-13 08:51:42,742 INFO L434 NwaCegarLoop]: 76 mSDtfsCounter, 138 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:42,742 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1664 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 08:51:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2024-09-13 08:51:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 683. [2024-09-13 08:51:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.37905604719764) internal successors, (935), 678 states have internal predecessors, (935), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 939 transitions. [2024-09-13 08:51:43,383 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 939 transitions. Word has length 45 [2024-09-13 08:51:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:43,384 INFO L474 AbstractCegarLoop]: Abstraction has 683 states and 939 transitions. [2024-09-13 08:51:43,384 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:43,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 939 transitions. [2024-09-13 08:51:43,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 08:51:43,385 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:43,385 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:43,397 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-13 08:51:43,585 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-13 08:51:43,585 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:43,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:43,585 INFO L85 PathProgramCache]: Analyzing trace with hash 516511681, now seen corresponding path program 20 times [2024-09-13 08:51:43,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:43,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852875188] [2024-09-13 08:51:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:43,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:43,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-13 08:51:43,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:43,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852875188] [2024-09-13 08:51:43,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852875188] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:43,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089043411] [2024-09-13 08:51:43,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:51:43,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:43,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:43,723 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:51:43,730 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-13 08:51:43,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:51:43,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:51:43,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 08:51:43,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-13 08:51:43,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-13 08:51:43,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089043411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:43,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:43,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2024-09-13 08:51:43,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104230087] [2024-09-13 08:51:43,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:43,899 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 08:51:43,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:43,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 08:51:43,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-13 08:51:43,899 INFO L87 Difference]: Start difference. First operand 683 states and 939 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:44,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:44,679 INFO L93 Difference]: Finished difference Result 765 states and 1040 transitions. [2024-09-13 08:51:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 08:51:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-13 08:51:44,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:44,682 INFO L225 Difference]: With dead ends: 765 [2024-09-13 08:51:44,682 INFO L226 Difference]: Without dead ends: 715 [2024-09-13 08:51:44,683 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 SyntacticMatches, 17 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-13 08:51:44,683 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:44,683 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 128 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:51:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2024-09-13 08:51:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 667. [2024-09-13 08:51:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 662 states have (on average 1.3867069486404835) internal successors, (918), 662 states have internal predecessors, (918), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 922 transitions. [2024-09-13 08:51:45,352 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 922 transitions. Word has length 46 [2024-09-13 08:51:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:45,352 INFO L474 AbstractCegarLoop]: Abstraction has 667 states and 922 transitions. [2024-09-13 08:51:45,352 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:45,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 922 transitions. [2024-09-13 08:51:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 08:51:45,356 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:45,356 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:45,368 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-13 08:51:45,556 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-13 08:51:45,557 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:45,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:45,557 INFO L85 PathProgramCache]: Analyzing trace with hash 2051607266, now seen corresponding path program 21 times [2024-09-13 08:51:45,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:45,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378871708] [2024-09-13 08:51:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:45,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:45,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 28 proven. 43 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-13 08:51:45,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:45,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378871708] [2024-09-13 08:51:45,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378871708] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:45,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347138692] [2024-09-13 08:51:45,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:51:45,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:45,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:45,886 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:51:45,887 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-13 08:51:46,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 08:51:46,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:51:46,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-13 08:51:46,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-13 08:51:46,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-13 08:51:46,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347138692] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:46,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:46,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2024-09-13 08:51:46,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433201623] [2024-09-13 08:51:46,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:46,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 08:51:46,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:46,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 08:51:46,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2024-09-13 08:51:46,271 INFO L87 Difference]: Start difference. First operand 667 states and 922 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:51:51,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:51:59,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:52:07,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:52:15,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:52:20,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:52:24,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:52:24,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:24,789 INFO L93 Difference]: Finished difference Result 1029 states and 1507 transitions. [2024-09-13 08:52:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-13 08:52:24,790 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2024-09-13 08:52:24,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:24,793 INFO L225 Difference]: With dead ends: 1029 [2024-09-13 08:52:24,793 INFO L226 Difference]: Without dead ends: 992 [2024-09-13 08:52:24,794 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=448, Invalid=1805, Unknown=3, NotChecked=0, Total=2256 [2024-09-13 08:52:24,794 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 60 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:24,794 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 189 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 304 Invalid, 6 Unknown, 0 Unchecked, 24.8s Time] [2024-09-13 08:52:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2024-09-13 08:52:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 882. [2024-09-13 08:52:25,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 877 states have (on average 1.4378563283922463) internal successors, (1261), 877 states have internal predecessors, (1261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1265 transitions. [2024-09-13 08:52:25,675 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1265 transitions. Word has length 48 [2024-09-13 08:52:25,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:25,675 INFO L474 AbstractCegarLoop]: Abstraction has 882 states and 1265 transitions. [2024-09-13 08:52:25,675 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:25,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:25,675 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1265 transitions. [2024-09-13 08:52:25,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 08:52:25,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:25,676 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:25,689 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-13 08:52:25,876 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:25,877 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:25,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:25,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1035706990, now seen corresponding path program 22 times [2024-09-13 08:52:25,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:25,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038835174] [2024-09-13 08:52:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:25,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:26,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-13 08:52:26,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:26,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038835174] [2024-09-13 08:52:26,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038835174] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:26,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734729005] [2024-09-13 08:52:26,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:52:26,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:26,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:26,199 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:52:26,200 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-13 08:52:26,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:52:26,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:52:26,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-13 08:52:26,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-13 08:52:26,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-13 08:52:26,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734729005] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:26,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:26,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2024-09-13 08:52:26,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322496992] [2024-09-13 08:52:26,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:26,892 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-13 08:52:26,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-13 08:52:26,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 08:52:26,893 INFO L87 Difference]: Start difference. First operand 882 states and 1265 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:33,763 INFO L93 Difference]: Finished difference Result 1260 states and 1741 transitions. [2024-09-13 08:52:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-09-13 08:52:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2024-09-13 08:52:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:33,767 INFO L225 Difference]: With dead ends: 1260 [2024-09-13 08:52:33,768 INFO L226 Difference]: Without dead ends: 1162 [2024-09-13 08:52:33,769 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 83 SyntacticMatches, 18 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1577, Invalid=16783, Unknown=0, NotChecked=0, Total=18360 [2024-09-13 08:52:33,769 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 190 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:33,769 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 664 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2279 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 08:52:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2024-09-13 08:52:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 834. [2024-09-13 08:52:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 829 states have (on average 1.4330518697225574) internal successors, (1188), 829 states have internal predecessors, (1188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:34,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1192 transitions. [2024-09-13 08:52:34,642 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1192 transitions. Word has length 48 [2024-09-13 08:52:34,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:34,643 INFO L474 AbstractCegarLoop]: Abstraction has 834 states and 1192 transitions. [2024-09-13 08:52:34,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:34,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1192 transitions. [2024-09-13 08:52:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 08:52:34,644 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:34,644 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:34,656 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-13 08:52:34,844 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:34,844 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:34,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash -308673998, now seen corresponding path program 7 times [2024-09-13 08:52:34,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:34,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352041285] [2024-09-13 08:52:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:34,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:35,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:52:35,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:35,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352041285] [2024-09-13 08:52:35,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352041285] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:35,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106992097] [2024-09-13 08:52:35,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:52:35,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:35,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:35,221 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:52:35,222 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-13 08:52:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:35,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-13 08:52:35,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-13 08:52:35,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-13 08:52:36,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106992097] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:36,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:36,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2024-09-13 08:52:36,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975998548] [2024-09-13 08:52:36,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:36,046 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 08:52:36,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 08:52:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:52:36,046 INFO L87 Difference]: Start difference. First operand 834 states and 1192 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:48,783 INFO L93 Difference]: Finished difference Result 1394 states and 1948 transitions. [2024-09-13 08:52:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2024-09-13 08:52:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2024-09-13 08:52:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:48,787 INFO L225 Difference]: With dead ends: 1394 [2024-09-13 08:52:48,787 INFO L226 Difference]: Without dead ends: 1258 [2024-09-13 08:52:48,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 80 SyntacticMatches, 20 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24160 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2754, Invalid=62526, Unknown=0, NotChecked=0, Total=65280 [2024-09-13 08:52:48,791 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 327 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 6761 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 7062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 6761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:48,791 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 400 Invalid, 7062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 6761 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-13 08:52:48,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2024-09-13 08:52:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 855. [2024-09-13 08:52:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 850 states have (on average 1.4141176470588235) internal successors, (1202), 850 states have internal predecessors, (1202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1206 transitions. [2024-09-13 08:52:49,728 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1206 transitions. Word has length 48 [2024-09-13 08:52:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:49,728 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 1206 transitions. [2024-09-13 08:52:49,729 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:49,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1206 transitions. [2024-09-13 08:52:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 08:52:49,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:49,730 INFO L216 NwaCegarLoop]: trace histogram [15, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:49,744 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-09-13 08:52:49,930 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:49,930 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:49,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:49,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1163134880, now seen corresponding path program 23 times [2024-09-13 08:52:49,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:49,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404225896] [2024-09-13 08:52:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:49,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:50,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-13 08:52:50,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:50,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404225896] [2024-09-13 08:52:50,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404225896] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:50,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055725065] [2024-09-13 08:52:50,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:52:50,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:50,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:50,268 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:52:50,269 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-13 08:52:50,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-13 08:52:50,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:52:50,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-13 08:52:50,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-13 08:52:50,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-13 08:52:50,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055725065] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:50,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:50,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 12] total 39 [2024-09-13 08:52:50,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119846427] [2024-09-13 08:52:50,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:50,779 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-13 08:52:50,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-13 08:52:50,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2024-09-13 08:52:50,780 INFO L87 Difference]: Start difference. First operand 855 states and 1206 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:54,541 INFO L93 Difference]: Finished difference Result 1918 states and 2689 transitions. [2024-09-13 08:52:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-13 08:52:54,541 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2024-09-13 08:52:54,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:54,546 INFO L225 Difference]: With dead ends: 1918 [2024-09-13 08:52:54,546 INFO L226 Difference]: Without dead ends: 1657 [2024-09-13 08:52:54,547 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=984, Invalid=3176, Unknown=0, NotChecked=0, Total=4160 [2024-09-13 08:52:54,547 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 375 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:54,547 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1399 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 08:52:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2024-09-13 08:52:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 957. [2024-09-13 08:52:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 952 states have (on average 1.3592436974789917) internal successors, (1294), 952 states have internal predecessors, (1294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1298 transitions. [2024-09-13 08:52:55,478 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1298 transitions. Word has length 48 [2024-09-13 08:52:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:55,478 INFO L474 AbstractCegarLoop]: Abstraction has 957 states and 1298 transitions. [2024-09-13 08:52:55,478 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:55,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1298 transitions. [2024-09-13 08:52:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 08:52:55,480 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:55,480 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:55,493 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-09-13 08:52:55,680 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-13 08:52:55,680 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:55,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash -957060563, now seen corresponding path program 24 times [2024-09-13 08:52:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:55,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633696371] [2024-09-13 08:52:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:55,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 08:52:55,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:55,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633696371] [2024-09-13 08:52:55,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633696371] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:55,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702214816] [2024-09-13 08:52:55,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:52:55,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:55,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:55,859 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:52:55,860 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-13 08:52:55,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 08:52:55,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:52:55,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-13 08:52:55,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 08:52:56,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 08:52:56,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702214816] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:56,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:56,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2024-09-13 08:52:56,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604403588] [2024-09-13 08:52:56,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:56,111 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 08:52:56,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:56,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 08:52:56,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-13 08:52:56,111 INFO L87 Difference]: Start difference. First operand 957 states and 1298 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:57,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:57,251 INFO L93 Difference]: Finished difference Result 1040 states and 1398 transitions. [2024-09-13 08:52:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 08:52:57,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-13 08:52:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:57,255 INFO L225 Difference]: With dead ends: 1040 [2024-09-13 08:52:57,255 INFO L226 Difference]: Without dead ends: 988 [2024-09-13 08:52:57,255 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 19 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-13 08:52:57,256 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:57,256 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 168 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:52:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2024-09-13 08:52:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 939. [2024-09-13 08:52:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 934 states have (on average 1.3650963597430408) internal successors, (1275), 934 states have internal predecessors, (1275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1279 transitions. [2024-09-13 08:52:58,213 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1279 transitions. Word has length 51 [2024-09-13 08:52:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:58,213 INFO L474 AbstractCegarLoop]: Abstraction has 939 states and 1279 transitions. [2024-09-13 08:52:58,213 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:52:58,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1279 transitions. [2024-09-13 08:52:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 08:52:58,214 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:58,215 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:58,229 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-13 08:52:58,415 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-13 08:52:58,415 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:58,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:58,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1426629135, now seen corresponding path program 25 times [2024-09-13 08:52:58,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:58,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446840329] [2024-09-13 08:52:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:58,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:58,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-13 08:52:58,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:58,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446840329] [2024-09-13 08:52:58,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446840329] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:58,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661084891] [2024-09-13 08:52:58,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:52:58,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:58,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:58,697 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:52:58,697 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-13 08:52:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:58,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-13 08:52:58,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-13 08:52:59,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-13 08:52:59,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661084891] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:59,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:59,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2024-09-13 08:52:59,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948791508] [2024-09-13 08:52:59,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:59,521 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 08:52:59,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:59,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 08:52:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:52:59,521 INFO L87 Difference]: Start difference. First operand 939 states and 1279 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:53:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:53:08,542 INFO L93 Difference]: Finished difference Result 1388 states and 1845 transitions. [2024-09-13 08:53:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-09-13 08:53:08,542 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-13 08:53:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:53:08,547 INFO L225 Difference]: With dead ends: 1388 [2024-09-13 08:53:08,547 INFO L226 Difference]: Without dead ends: 1286 [2024-09-13 08:53:08,549 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 87 SyntacticMatches, 20 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6656 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1899, Invalid=20751, Unknown=0, NotChecked=0, Total=22650 [2024-09-13 08:53:08,549 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 210 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 2988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:53:08,549 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 797 Invalid, 2988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2808 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-13 08:53:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-09-13 08:53:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 939. [2024-09-13 08:53:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 934 states have (on average 1.3511777301927195) internal successors, (1262), 934 states have internal predecessors, (1262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:53:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1266 transitions. [2024-09-13 08:53:09,509 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1266 transitions. Word has length 51 [2024-09-13 08:53:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:53:09,509 INFO L474 AbstractCegarLoop]: Abstraction has 939 states and 1266 transitions. [2024-09-13 08:53:09,509 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:53:09,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:53:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1266 transitions. [2024-09-13 08:53:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 08:53:09,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:53:09,510 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:53:09,523 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-09-13 08:53:09,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:53:09,711 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:53:09,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:53:09,711 INFO L85 PathProgramCache]: Analyzing trace with hash -693108371, now seen corresponding path program 8 times [2024-09-13 08:53:09,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:53:09,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445857087] [2024-09-13 08:53:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:53:09,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:53:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:53:10,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:53:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:53:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:53:10,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:53:10,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445857087] [2024-09-13 08:53:10,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445857087] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:53:10,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450359956] [2024-09-13 08:53:10,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:53:10,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:53:10,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:53:10,132 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:53:10,134 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-13 08:53:10,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:53:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:53:10,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-13 08:53:10,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:53:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-13 08:53:10,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:53:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-13 08:53:11,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450359956] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:53:11,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:53:11,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 39 [2024-09-13 08:53:11,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073468598] [2024-09-13 08:53:11,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:53:11,094 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-13 08:53:11,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:53:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-13 08:53:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2024-09-13 08:53:11,094 INFO L87 Difference]: Start difference. First operand 939 states and 1266 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:53:27,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:53:27,534 INFO L93 Difference]: Finished difference Result 1497 states and 2031 transitions. [2024-09-13 08:53:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2024-09-13 08:53:27,534 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-13 08:53:27,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:53:27,538 INFO L225 Difference]: With dead ends: 1497 [2024-09-13 08:53:27,539 INFO L226 Difference]: Without dead ends: 1375 [2024-09-13 08:53:27,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 84 SyntacticMatches, 22 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32210 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3237, Invalid=82319, Unknown=0, NotChecked=0, Total=85556 [2024-09-13 08:53:27,542 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 331 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 9248 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 9587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 9248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:53:27,542 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 484 Invalid, 9587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 9248 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-09-13 08:53:27,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2024-09-13 08:53:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 963. [2024-09-13 08:53:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.3392484342379958) internal successors, (1283), 958 states have internal predecessors, (1283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:53:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1287 transitions. [2024-09-13 08:53:28,559 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1287 transitions. Word has length 51 [2024-09-13 08:53:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:53:28,559 INFO L474 AbstractCegarLoop]: Abstraction has 963 states and 1287 transitions. [2024-09-13 08:53:28,559 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:53:28,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:53:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1287 transitions. [2024-09-13 08:53:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 08:53:28,560 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:53:28,560 INFO L216 NwaCegarLoop]: trace histogram [16, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:53:28,572 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-09-13 08:53:28,760 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:53:28,761 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:53:28,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:53:28,761 INFO L85 PathProgramCache]: Analyzing trace with hash -206398450, now seen corresponding path program 26 times [2024-09-13 08:53:28,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:53:28,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125550098] [2024-09-13 08:53:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:53:28,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:53:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:53:29,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:53:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:53:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:53:29,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:53:29,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125550098] [2024-09-13 08:53:29,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125550098] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:53:29,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351453278] [2024-09-13 08:53:29,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:53:29,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:53:29,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:53:29,042 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:53:29,043 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-13 08:53:29,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:53:29,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:53:29,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-13 08:53:29,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:53:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:53:29,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:53:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-13 08:53:29,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351453278] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:53:29,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:53:29,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 16] total 45 [2024-09-13 08:53:29,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304444073] [2024-09-13 08:53:29,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:53:29,611 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-13 08:53:29,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:53:29,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-13 08:53:29,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2024-09-13 08:53:29,612 INFO L87 Difference]: Start difference. First operand 963 states and 1287 transitions. Second operand has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:53:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:53:37,436 INFO L93 Difference]: Finished difference Result 1828 states and 2515 transitions. [2024-09-13 08:53:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2024-09-13 08:53:37,436 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-13 08:53:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:53:37,441 INFO L225 Difference]: With dead ends: 1828 [2024-09-13 08:53:37,441 INFO L226 Difference]: Without dead ends: 1398 [2024-09-13 08:53:37,443 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7225 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1455, Invalid=23351, Unknown=0, NotChecked=0, Total=24806 [2024-09-13 08:53:37,443 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 163 mSDsluCounter, 1752 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:53:37,444 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1832 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2861 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-13 08:53:37,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2024-09-13 08:53:38,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1028. [2024-09-13 08:53:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1023 states have (on average 1.3870967741935485) internal successors, (1419), 1023 states have internal predecessors, (1419), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:53:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1423 transitions. [2024-09-13 08:53:38,564 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1423 transitions. Word has length 51 [2024-09-13 08:53:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:53:38,564 INFO L474 AbstractCegarLoop]: Abstraction has 1028 states and 1423 transitions. [2024-09-13 08:53:38,564 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:53:38,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:53:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1423 transitions. [2024-09-13 08:53:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-13 08:53:38,566 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:53:38,566 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:53:38,580 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-09-13 08:53:38,769 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-13 08:53:38,769 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:53:38,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:53:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash -700722420, now seen corresponding path program 27 times [2024-09-13 08:53:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:53:38,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256201832] [2024-09-13 08:53:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:53:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:53:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:53:39,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:53:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:53:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-13 08:53:39,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:53:39,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256201832] [2024-09-13 08:53:39,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256201832] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:53:39,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370578266] [2024-09-13 08:53:39,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:53:39,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:53:39,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:53:39,166 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:53:39,167 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-13 08:53:39,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 08:53:39,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:53:39,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-13 08:53:39,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:53:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-13 08:53:39,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:53:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-13 08:53:39,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370578266] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:53:39,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:53:39,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 27 [2024-09-13 08:53:39,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443843603] [2024-09-13 08:53:39,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:53:39,564 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-13 08:53:39,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:53:39,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-13 08:53:39,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2024-09-13 08:53:39,565 INFO L87 Difference]: Start difference. First operand 1028 states and 1423 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:53:44,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-13 08:53:49,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []