./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de32.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-de32.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 be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 --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 08:48:58,492 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 08:48:58,553 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 08:48:58,557 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 08:48:58,557 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 08:48:58,586 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 08:48:58,588 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 08:48:58,588 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 08:48:58,589 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 08:48:58,589 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 08:48:58,590 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 08:48:58,590 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 08:48:58,591 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 08:48:58,591 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 08:48:58,593 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 08:48:58,593 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 08:48:58,594 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 08:48:58,595 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 08:48:58,595 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 08:48:58,595 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 08:48:58,595 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 08:48:58,599 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 08:48:58,599 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 08:48:58,599 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 08:48:58,600 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 08:48:58,600 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 08:48:58,600 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 08:48:58,600 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 08:48:58,600 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 08:48:58,601 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 08:48:58,601 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 08:48:58,601 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 08:48:58,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:48:58,602 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 08:48:58,602 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 08:48:58,602 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 08:48:58,603 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 08:48:58,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 08:48:58,603 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 08:48:58,604 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 08:48:58,604 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 08:48:58,604 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 08:48:58,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 08:48:58,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 08:48:58,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 08:48:58,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 08:48:58,884 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 08:48:58,885 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 08:48:58,886 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de32.c [2024-09-13 08:49:00,267 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 08:49:00,434 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 08:49:00,435 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de32.c [2024-09-13 08:49:00,442 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/66dd5d00d/02132435d02e4f9d9a6cb8c0a946005d/FLAG3eef36c70 [2024-09-13 08:49:00,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/66dd5d00d/02132435d02e4f9d9a6cb8c0a946005d [2024-09-13 08:49:00,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 08:49:00,857 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 08:49:00,860 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 08:49:00,860 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 08:49:00,865 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 08:49:00,867 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:49:00" (1/1) ... [2024-09-13 08:49:00,868 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bda5902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:00, skipping insertion in model container [2024-09-13 08:49:00,869 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:49:00" (1/1) ... [2024-09-13 08:49:00,887 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 08:49:01,024 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-de32.c[368,381] [2024-09-13 08:49:01,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:49:01,043 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 08:49:01,054 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-de32.c[368,381] [2024-09-13 08:49:01,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:49:01,076 INFO L204 MainTranslator]: Completed translation [2024-09-13 08:49:01,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01 WrapperNode [2024-09-13 08:49:01,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 08:49:01,080 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 08:49:01,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 08:49:01,081 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 08:49:01,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,093 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,097 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 08:49:01,097 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 08:49:01,098 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 08:49:01,098 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 08:49:01,098 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 08:49:01,106 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,107 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,116 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 08:49:01,116 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,116 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,119 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,124 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,125 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,126 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,128 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 08:49:01,129 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 08:49:01,129 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 08:49:01,129 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 08:49:01,130 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (1/1) ... [2024-09-13 08:49:01,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:49:01,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:01,163 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 08:49:01,167 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 08:49:01,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 08:49:01,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 08:49:01,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 08:49:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 08:49:01,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 08:49:01,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 08:49:01,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 08:49:01,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 08:49:01,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 08:49:01,215 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 08:49:01,277 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 08:49:01,279 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 08:49:01,473 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-13 08:49:01,474 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 08:49:01,505 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 08:49:01,505 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-13 08:49:01,506 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:49:01 BoogieIcfgContainer [2024-09-13 08:49:01,506 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 08:49:01,508 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 08:49:01,509 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 08:49:01,513 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 08:49:01,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 08:49:00" (1/3) ... [2024-09-13 08:49:01,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7886268e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:49:01, skipping insertion in model container [2024-09-13 08:49:01,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:49:01" (2/3) ... [2024-09-13 08:49:01,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7886268e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:49:01, skipping insertion in model container [2024-09-13 08:49:01,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:49:01" (3/3) ... [2024-09-13 08:49:01,517 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de32.c [2024-09-13 08:49:01,532 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 08:49:01,533 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 08:49:01,591 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 08:49:01,596 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;@7b906eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 08:49:01,597 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 08:49:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 08:49:01,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-13 08:49:01,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:01,608 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:01,609 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:01,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:01,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1284096195, now seen corresponding path program 1 times [2024-09-13 08:49:01,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:01,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451379937] [2024-09-13 08:49:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:01,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:01,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:01,774 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 08:49:01,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:01,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451379937] [2024-09-13 08:49:01,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451379937] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:49:01,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:49:01,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 08:49:01,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975409899] [2024-09-13 08:49:01,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:01,782 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 08:49:01,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:01,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 08:49:01,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 08:49:01,804 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 08:49:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:01,832 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-09-13 08:49:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 08:49:01,834 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2024-09-13 08:49:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:01,838 INFO L225 Difference]: With dead ends: 34 [2024-09-13 08:49:01,838 INFO L226 Difference]: Without dead ends: 14 [2024-09-13 08:49:01,840 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 08:49:01,842 INFO L434 NwaCegarLoop]: 20 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, 20 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 08:49:01,843 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-13 08:49:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-13 08:49:01,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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 08:49:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-09-13 08:49:01,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 13 [2024-09-13 08:49:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:01,869 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-09-13 08:49:01,869 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 08:49:01,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-09-13 08:49:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-13 08:49:01,870 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:01,870 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:01,870 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 08:49:01,871 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:01,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:01,872 INFO L85 PathProgramCache]: Analyzing trace with hash 334597057, now seen corresponding path program 1 times [2024-09-13 08:49:01,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:01,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690782707] [2024-09-13 08:49:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:01,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:02,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:02,114 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 08:49:02,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:02,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690782707] [2024-09-13 08:49:02,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690782707] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:49:02,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:49:02,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 08:49:02,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063111168] [2024-09-13 08:49:02,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:02,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 08:49:02,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 08:49:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:49:02,123 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 08:49:02,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:02,183 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-09-13 08:49:02,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 08:49:02,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 13 [2024-09-13 08:49:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:02,184 INFO L225 Difference]: With dead ends: 21 [2024-09-13 08:49:02,184 INFO L226 Difference]: Without dead ends: 16 [2024-09-13 08:49:02,185 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 08:49:02,186 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:02,186 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-13 08:49:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-13 08:49:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 08:49:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-09-13 08:49:02,193 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2024-09-13 08:49:02,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:02,194 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-09-13 08:49:02,194 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 08:49:02,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:02,195 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-09-13 08:49:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-13 08:49:02,195 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:02,196 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:02,196 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 08:49:02,196 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:02,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:02,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1818111943, now seen corresponding path program 1 times [2024-09-13 08:49:02,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:02,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846663160] [2024-09-13 08:49:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:02,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:02,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:02,321 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 08:49:02,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:02,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846663160] [2024-09-13 08:49:02,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846663160] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:49:02,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:49:02,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 08:49:02,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752924616] [2024-09-13 08:49:02,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:02,326 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 08:49:02,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:02,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 08:49:02,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 08:49:02,327 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:02,357 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-09-13 08:49:02,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 08:49:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-13 08:49:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:02,361 INFO L225 Difference]: With dead ends: 28 [2024-09-13 08:49:02,361 INFO L226 Difference]: Without dead ends: 21 [2024-09-13 08:49:02,362 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 08:49:02,363 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 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 08:49:02,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:02,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-13 08:49:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-13 08:49:02,370 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 08:49:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-13 08:49:02,371 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2024-09-13 08:49:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:02,372 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-13 08:49:02,372 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:02,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-13 08:49:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-13 08:49:02,373 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:02,373 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:02,373 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 08:49:02,373 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:02,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:02,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1074026954, now seen corresponding path program 1 times [2024-09-13 08:49:02,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:02,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704683566] [2024-09-13 08:49:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:02,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:02,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:02,472 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 08:49:02,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:02,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704683566] [2024-09-13 08:49:02,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704683566] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:49:02,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:49:02,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 08:49:02,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561117671] [2024-09-13 08:49:02,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:02,476 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 08:49:02,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:02,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 08:49:02,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 08:49:02,477 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:02,518 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-09-13 08:49:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 08:49:02,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-13 08:49:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:02,519 INFO L225 Difference]: With dead ends: 26 [2024-09-13 08:49:02,519 INFO L226 Difference]: Without dead ends: 17 [2024-09-13 08:49:02,519 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 08:49:02,520 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:02,521 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-13 08:49:02,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-13 08:49:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 08:49:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-09-13 08:49:02,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2024-09-13 08:49:02,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:02,530 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-09-13 08:49:02,530 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:02,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:02,531 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-09-13 08:49:02,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-13 08:49:02,531 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:02,531 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:02,533 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 08:49:02,534 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:02,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:02,534 INFO L85 PathProgramCache]: Analyzing trace with hash 161814611, now seen corresponding path program 1 times [2024-09-13 08:49:02,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:02,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676380869] [2024-09-13 08:49:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:02,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:02,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:02,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:02,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676380869] [2024-09-13 08:49:02,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676380869] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:02,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412496922] [2024-09-13 08:49:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:02,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:02,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:02,671 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 08:49:02,674 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 08:49:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:02,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 08:49:02,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:02,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:02,827 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 08:49:02,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412496922] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:02,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-13 08:49:02,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-13 08:49:02,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160356165] [2024-09-13 08:49:02,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:02,832 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 08:49:02,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:02,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 08:49:02,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:49:02,833 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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 08:49:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:02,856 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-09-13 08:49:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 08:49:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) 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 08:49:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:02,857 INFO L225 Difference]: With dead ends: 23 [2024-09-13 08:49:02,857 INFO L226 Difference]: Without dead ends: 16 [2024-09-13 08:49:02,858 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:49:02,859 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:02,859 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-13 08:49:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-13 08:49:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-13 08:49:02,863 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 15 [2024-09-13 08:49:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:02,864 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-13 08:49:02,864 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) 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 08:49:02,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-13 08:49:02,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-13 08:49:02,865 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:02,865 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:02,881 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 08:49:03,065 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:03,066 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:03,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:03,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1564643010, now seen corresponding path program 1 times [2024-09-13 08:49:03,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:03,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712264394] [2024-09-13 08:49:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:03,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:03,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:03,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:03,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712264394] [2024-09-13 08:49:03,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712264394] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:03,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365543207] [2024-09-13 08:49:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:03,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:03,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:03,164 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 08:49:03,167 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 08:49:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:03,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 08:49:03,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:03,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:03,299 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 08:49:03,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365543207] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:03,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-13 08:49:03,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2024-09-13 08:49:03,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018082242] [2024-09-13 08:49:03,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:49:03,301 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 08:49:03,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:03,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 08:49:03,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:49:03,302 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) 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 08:49:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:03,318 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-09-13 08:49:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 08:49:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) 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 08:49:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:03,320 INFO L225 Difference]: With dead ends: 22 [2024-09-13 08:49:03,320 INFO L226 Difference]: Without dead ends: 17 [2024-09-13 08:49:03,320 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 08:49:03,321 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 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 08:49:03,321 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-13 08:49:03,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-13 08:49:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 08:49:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-09-13 08:49:03,329 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2024-09-13 08:49:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:03,329 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-09-13 08:49:03,329 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) 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 08:49:03,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-09-13 08:49:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-13 08:49:03,330 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:03,331 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:03,346 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 08:49:03,534 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 08:49:03,535 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:03,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:03,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1294830822, now seen corresponding path program 1 times [2024-09-13 08:49:03,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:03,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224269776] [2024-09-13 08:49:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:03,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:03,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:03,691 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 08:49:03,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:03,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224269776] [2024-09-13 08:49:03,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224269776] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:03,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963941147] [2024-09-13 08:49:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:03,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:03,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:03,695 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 08:49:03,696 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 08:49:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:03,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 08:49:03,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:03,844 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 08:49:03,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:03,903 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 08:49:03,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963941147] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:03,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:03,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-13 08:49:03,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579302676] [2024-09-13 08:49:03,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:03,904 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 08:49:03,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 08:49:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:49:03,905 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 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 08:49:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:03,942 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-09-13 08:49:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 08:49:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 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 16 [2024-09-13 08:49:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:03,943 INFO L225 Difference]: With dead ends: 25 [2024-09-13 08:49:03,944 INFO L226 Difference]: Without dead ends: 20 [2024-09-13 08:49:03,944 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-13 08:49:03,945 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:03,945 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-13 08:49:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-09-13 08:49:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-09-13 08:49:03,950 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2024-09-13 08:49:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:03,950 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-09-13 08:49:03,950 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 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 08:49:03,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-09-13 08:49:03,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-13 08:49:03,951 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:03,951 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:03,967 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 08:49:04,152 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 08:49:04,152 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:04,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1520587586, now seen corresponding path program 2 times [2024-09-13 08:49:04,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:04,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430558730] [2024-09-13 08:49:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:04,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:04,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:04,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:04,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430558730] [2024-09-13 08:49:04,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430558730] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:04,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356443207] [2024-09-13 08:49:04,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:04,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:04,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:04,222 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 08:49:04,224 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 08:49:04,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:04,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:04,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 08:49:04,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:04,289 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 08:49:04,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:04,348 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 08:49:04,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356443207] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:04,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:04,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-09-13 08:49:04,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833781383] [2024-09-13 08:49:04,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:04,350 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 08:49:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 08:49:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:49:04,354 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 08:49:04,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:04,468 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2024-09-13 08:49:04,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 08:49:04,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 17 [2024-09-13 08:49:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:04,472 INFO L225 Difference]: With dead ends: 60 [2024-09-13 08:49:04,472 INFO L226 Difference]: Without dead ends: 52 [2024-09-13 08:49:04,472 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-09-13 08:49:04,473 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:04,473 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-13 08:49:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2024-09-13 08:49:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 08:49:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2024-09-13 08:49:04,502 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 17 [2024-09-13 08:49:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:04,502 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2024-09-13 08:49:04,503 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 08:49:04,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2024-09-13 08:49:04,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-13 08:49:04,504 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:04,504 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:04,522 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 08:49:04,704 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:04,705 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:04,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:04,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2058594995, now seen corresponding path program 3 times [2024-09-13 08:49:04,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:04,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993392813] [2024-09-13 08:49:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:04,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:04,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 08:49:04,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:04,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993392813] [2024-09-13 08:49:04,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993392813] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:04,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354751580] [2024-09-13 08:49:04,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:04,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:04,808 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 08:49:04,809 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 08:49:04,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-13 08:49:04,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:04,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 08:49:04,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:04,904 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 08:49:04,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:04,988 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 08:49:04,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354751580] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:04,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:04,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-09-13 08:49:04,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255135580] [2024-09-13 08:49:04,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:04,990 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 08:49:04,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:04,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 08:49:04,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-13 08:49:04,992 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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 08:49:05,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:05,171 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2024-09-13 08:49:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 08:49:05,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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 08:49:05,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:05,173 INFO L225 Difference]: With dead ends: 56 [2024-09-13 08:49:05,173 INFO L226 Difference]: Without dead ends: 41 [2024-09-13 08:49:05,173 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-09-13 08:49:05,174 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:05,174 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-13 08:49:05,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-09-13 08:49:05,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 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 08:49:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2024-09-13 08:49:05,187 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 17 [2024-09-13 08:49:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:05,187 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2024-09-13 08:49:05,187 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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 08:49:05,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2024-09-13 08:49:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-13 08:49:05,188 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:05,189 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:05,205 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 08:49:05,392 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:05,393 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:05,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:05,393 INFO L85 PathProgramCache]: Analyzing trace with hash 891793825, now seen corresponding path program 4 times [2024-09-13 08:49:05,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:05,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292561501] [2024-09-13 08:49:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:05,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:05,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:05,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:05,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292561501] [2024-09-13 08:49:05,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292561501] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:05,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532173529] [2024-09-13 08:49:05,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:49:05,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:05,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:05,519 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 08:49:05,520 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 08:49:05,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:49:05,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:05,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:49:05,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:05,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:05,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532173529] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:05,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:05,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-09-13 08:49:05,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678082554] [2024-09-13 08:49:05,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:05,718 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 08:49:05,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:05,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 08:49:05,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-13 08:49:05,718 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 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 08:49:05,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:05,792 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2024-09-13 08:49:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 08:49:05,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 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 19 [2024-09-13 08:49:05,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:05,794 INFO L225 Difference]: With dead ends: 59 [2024-09-13 08:49:05,795 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 08:49:05,795 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-13 08:49:05,795 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:05,796 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 87 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 08:49:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2024-09-13 08:49:05,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 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 08:49:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2024-09-13 08:49:05,826 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 19 [2024-09-13 08:49:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:05,826 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2024-09-13 08:49:05,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 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 08:49:05,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:05,827 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2024-09-13 08:49:05,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-13 08:49:05,828 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:05,828 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:05,848 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 08:49:06,031 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 08:49:06,032 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:06,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:06,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1911342567, now seen corresponding path program 5 times [2024-09-13 08:49:06,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:06,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191264374] [2024-09-13 08:49:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:06,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:06,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:06,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:06,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191264374] [2024-09-13 08:49:06,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191264374] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:06,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787363187] [2024-09-13 08:49:06,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:49:06,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:06,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:06,099 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 08:49:06,100 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 08:49:06,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-13 08:49:06,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:06,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 08:49:06,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:06,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:06,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787363187] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:06,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:06,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2024-09-13 08:49:06,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212042513] [2024-09-13 08:49:06,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:06,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 08:49:06,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:06,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 08:49:06,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-13 08:49:06,230 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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 08:49:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:06,384 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2024-09-13 08:49:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 08:49:06,384 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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 20 [2024-09-13 08:49:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:06,386 INFO L225 Difference]: With dead ends: 88 [2024-09-13 08:49:06,386 INFO L226 Difference]: Without dead ends: 79 [2024-09-13 08:49:06,386 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:49:06,387 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:06,387 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:49:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-13 08:49:06,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2024-09-13 08:49:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.4) internal successors, (77), 55 states have internal predecessors, (77), 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 08:49:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2024-09-13 08:49:06,411 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 20 [2024-09-13 08:49:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:06,411 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2024-09-13 08:49:06,412 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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 08:49:06,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2024-09-13 08:49:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-13 08:49:06,414 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:06,414 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:06,430 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 08:49:06,614 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:06,615 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:06,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:06,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1409703062, now seen corresponding path program 6 times [2024-09-13 08:49:06,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:06,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417407360] [2024-09-13 08:49:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:06,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:06,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:06,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:06,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417407360] [2024-09-13 08:49:06,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417407360] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:06,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188137733] [2024-09-13 08:49:06,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:49:06,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:06,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:06,701 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 08:49:06,702 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 08:49:06,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-13 08:49:06,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:06,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 08:49:06,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:06,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:49:06,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188137733] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:06,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:06,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-09-13 08:49:06,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308578993] [2024-09-13 08:49:06,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:06,924 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 08:49:06,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 08:49:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-09-13 08:49:06,925 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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 08:49:07,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:07,107 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2024-09-13 08:49:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 08:49:07,108 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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 20 [2024-09-13 08:49:07,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:07,108 INFO L225 Difference]: With dead ends: 80 [2024-09-13 08:49:07,108 INFO L226 Difference]: Without dead ends: 67 [2024-09-13 08:49:07,109 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-09-13 08:49:07,109 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:07,109 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 88 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-13 08:49:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2024-09-13 08:49:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 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 08:49:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2024-09-13 08:49:07,124 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 20 [2024-09-13 08:49:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:07,124 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2024-09-13 08:49:07,124 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 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 08:49:07,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2024-09-13 08:49:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-13 08:49:07,125 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:07,125 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:07,141 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:07,328 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:07,329 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:07,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash -457266714, now seen corresponding path program 7 times [2024-09-13 08:49:07,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:07,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955256703] [2024-09-13 08:49:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:07,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:07,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:49:07,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:07,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955256703] [2024-09-13 08:49:07,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955256703] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:07,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522953101] [2024-09-13 08:49:07,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:49:07,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:07,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:07,413 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 08:49:07,414 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 08:49:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:07,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:49:07,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:49:07,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 08:49:07,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522953101] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:07,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:07,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2024-09-13 08:49:07,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841764538] [2024-09-13 08:49:07,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:07,557 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 08:49:07,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:07,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 08:49:07,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-13 08:49:07,558 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 08:49:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:07,670 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2024-09-13 08:49:07,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 08:49:07,670 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 20 [2024-09-13 08:49:07,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:07,671 INFO L225 Difference]: With dead ends: 61 [2024-09-13 08:49:07,671 INFO L226 Difference]: Without dead ends: 48 [2024-09-13 08:49:07,671 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:49:07,672 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:07,672 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 87 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-13 08:49:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-13 08:49:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:49:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2024-09-13 08:49:07,697 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 20 [2024-09-13 08:49:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:07,697 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2024-09-13 08:49:07,698 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 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 08:49:07,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2024-09-13 08:49:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-13 08:49:07,700 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:07,700 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:07,717 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 08:49:07,903 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-13 08:49:07,904 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:07,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2034432077, now seen corresponding path program 8 times [2024-09-13 08:49:07,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:07,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452589123] [2024-09-13 08:49:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:07,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:08,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:08,028 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 08:49:08,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:08,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452589123] [2024-09-13 08:49:08,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452589123] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:08,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659842349] [2024-09-13 08:49:08,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:08,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:08,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:08,030 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 08:49:08,032 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 08:49:08,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:08,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:08,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 08:49:08,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:08,117 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 08:49:08,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 08:49:08,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659842349] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:08,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:08,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 17 [2024-09-13 08:49:08,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643283503] [2024-09-13 08:49:08,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:08,222 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 08:49:08,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:08,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 08:49:08,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-09-13 08:49:08,223 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 08:49:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:08,431 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2024-09-13 08:49:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 08:49:08,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 08:49:08,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:08,433 INFO L225 Difference]: With dead ends: 75 [2024-09-13 08:49:08,433 INFO L226 Difference]: Without dead ends: 65 [2024-09-13 08:49:08,433 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2024-09-13 08:49:08,434 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:08,434 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 128 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-13 08:49:08,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2024-09-13 08:49:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 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 08:49:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-09-13 08:49:08,453 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 21 [2024-09-13 08:49:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:08,453 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-09-13 08:49:08,453 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 08:49:08,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-09-13 08:49:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-13 08:49:08,454 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:08,454 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:08,474 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-13 08:49:08,655 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 08:49:08,655 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:08,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:08,655 INFO L85 PathProgramCache]: Analyzing trace with hash 380377990, now seen corresponding path program 9 times [2024-09-13 08:49:08,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:08,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001012106] [2024-09-13 08:49:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:08,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:08,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:49:08,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:08,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001012106] [2024-09-13 08:49:08,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001012106] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:08,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948534545] [2024-09-13 08:49:08,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:08,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:08,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:08,820 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 08:49:08,821 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 08:49:08,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 08:49:08,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:08,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:49:08,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:49:08,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:49:09,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948534545] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:09,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:09,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2024-09-13 08:49:09,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450699770] [2024-09-13 08:49:09,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:09,014 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 08:49:09,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:09,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 08:49:09,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-13 08:49:09,015 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 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 08:49:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:09,140 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2024-09-13 08:49:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 08:49:09,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 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 22 [2024-09-13 08:49:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:09,141 INFO L225 Difference]: With dead ends: 87 [2024-09-13 08:49:09,141 INFO L226 Difference]: Without dead ends: 78 [2024-09-13 08:49:09,142 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 13 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-13 08:49:09,142 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:09,142 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:09,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-13 08:49:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2024-09-13 08:49:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 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 08:49:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-13 08:49:09,173 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 22 [2024-09-13 08:49:09,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:09,173 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-13 08:49:09,173 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 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 08:49:09,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:09,174 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-13 08:49:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-13 08:49:09,174 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:09,174 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:09,192 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 08:49:09,378 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 08:49:09,378 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:09,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash 571398099, now seen corresponding path program 10 times [2024-09-13 08:49:09,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:09,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430271077] [2024-09-13 08:49:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:09,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:09,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:49:09,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:09,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430271077] [2024-09-13 08:49:09,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430271077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:09,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861404951] [2024-09-13 08:49:09,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:49:09,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:09,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:09,506 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 08:49:09,507 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 08:49:09,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:49:09,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:09,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 08:49:09,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:49:09,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:49:09,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861404951] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:09,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:09,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2024-09-13 08:49:09,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079568258] [2024-09-13 08:49:09,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:09,778 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 08:49:09,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:09,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 08:49:09,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-13 08:49:09,780 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 08:49:10,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:10,758 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2024-09-13 08:49:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-13 08:49:10,759 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 23 [2024-09-13 08:49:10,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:10,760 INFO L225 Difference]: With dead ends: 96 [2024-09-13 08:49:10,760 INFO L226 Difference]: Without dead ends: 74 [2024-09-13 08:49:10,761 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:49:10,762 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:10,762 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 135 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:49:10,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-13 08:49:10,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2024-09-13 08:49:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 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 08:49:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-13 08:49:10,787 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 23 [2024-09-13 08:49:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:10,787 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-13 08:49:10,787 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 08:49:10,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-13 08:49:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-13 08:49:10,789 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:10,789 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:10,805 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 08:49:10,992 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 08:49:10,993 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:10,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:10,993 INFO L85 PathProgramCache]: Analyzing trace with hash 247533441, now seen corresponding path program 11 times [2024-09-13 08:49:10,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:10,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137412836] [2024-09-13 08:49:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:10,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:11,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:49:11,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:11,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137412836] [2024-09-13 08:49:11,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137412836] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:11,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924667761] [2024-09-13 08:49:11,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:49:11,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:11,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:11,187 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 08:49:11,188 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 08:49:11,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-13 08:49:11,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:11,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 08:49:11,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:49:11,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:49:11,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924667761] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:11,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:11,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2024-09-13 08:49:11,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384974905] [2024-09-13 08:49:11,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:11,409 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 08:49:11,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:11,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 08:49:11,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-13 08:49:11,410 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 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 08:49:11,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:11,533 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2024-09-13 08:49:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 08:49:11,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 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 08:49:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:11,534 INFO L225 Difference]: With dead ends: 87 [2024-09-13 08:49:11,534 INFO L226 Difference]: Without dead ends: 77 [2024-09-13 08:49:11,534 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 15 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-13 08:49:11,535 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:11,535 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 105 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-13 08:49:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2024-09-13 08:49:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 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 08:49:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-09-13 08:49:11,563 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 25 [2024-09-13 08:49:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:11,564 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-09-13 08:49:11,564 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 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 08:49:11,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-09-13 08:49:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-13 08:49:11,565 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:11,565 INFO L216 NwaCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:11,578 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-13 08:49:11,765 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 08:49:11,765 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:11,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:11,766 INFO L85 PathProgramCache]: Analyzing trace with hash -874703007, now seen corresponding path program 12 times [2024-09-13 08:49:11,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:11,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817748887] [2024-09-13 08:49:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:11,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:11,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:49:11,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:11,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817748887] [2024-09-13 08:49:11,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817748887] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:11,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931752282] [2024-09-13 08:49:11,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:49:11,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:11,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:11,911 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 08:49:11,914 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 08:49:11,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-13 08:49:11,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:11,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 08:49:11,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:49:12,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:49:12,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931752282] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:12,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:12,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2024-09-13 08:49:12,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506853999] [2024-09-13 08:49:12,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:12,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 08:49:12,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:12,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 08:49:12,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:49:12,144 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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 08:49:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:12,510 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-09-13 08:49:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-13 08:49:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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 08:49:12,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:12,512 INFO L225 Difference]: With dead ends: 89 [2024-09-13 08:49:12,512 INFO L226 Difference]: Without dead ends: 76 [2024-09-13 08:49:12,513 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 08:49:12,513 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:12,514 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 126 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-13 08:49:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2024-09-13 08:49:12,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 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 08:49:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2024-09-13 08:49:12,552 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 25 [2024-09-13 08:49:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:12,553 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2024-09-13 08:49:12,553 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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 08:49:12,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2024-09-13 08:49:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-13 08:49:12,554 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:12,554 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:12,567 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:12,755 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-13 08:49:12,756 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:12,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1920087306, now seen corresponding path program 13 times [2024-09-13 08:49:12,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:12,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744244332] [2024-09-13 08:49:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:12,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:12,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:49:12,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:12,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744244332] [2024-09-13 08:49:12,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744244332] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:12,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207031206] [2024-09-13 08:49:12,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:49:12,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:12,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:12,892 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 08:49:12,894 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 08:49:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:12,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-13 08:49:12,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:49:12,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:49:13,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207031206] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:13,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:13,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 24 [2024-09-13 08:49:13,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455053661] [2024-09-13 08:49:13,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:13,211 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 08:49:13,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:13,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 08:49:13,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-09-13 08:49:13,213 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 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 08:49:14,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:14,718 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2024-09-13 08:49:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-13 08:49:14,718 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 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 08:49:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:14,719 INFO L225 Difference]: With dead ends: 134 [2024-09-13 08:49:14,719 INFO L226 Difference]: Without dead ends: 108 [2024-09-13 08:49:14,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=678, Invalid=3744, Unknown=0, NotChecked=0, Total=4422 [2024-09-13 08:49:14,721 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 161 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:14,721 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 166 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:49:14,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-13 08:49:14,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2024-09-13 08:49:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 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 08:49:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2024-09-13 08:49:14,749 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 26 [2024-09-13 08:49:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:14,750 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2024-09-13 08:49:14,750 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 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 08:49:14,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2024-09-13 08:49:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-13 08:49:14,751 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:14,751 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:14,765 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 08:49:14,955 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:14,956 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:14,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:14,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1321611814, now seen corresponding path program 14 times [2024-09-13 08:49:14,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:14,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7937090] [2024-09-13 08:49:14,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:14,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:15,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 08:49:15,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:15,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7937090] [2024-09-13 08:49:15,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7937090] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:15,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633910731] [2024-09-13 08:49:15,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:15,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:15,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:15,161 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 08:49:15,163 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 08:49:15,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:15,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:15,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 08:49:15,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 08:49:15,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 08:49:15,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633910731] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:15,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:15,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-09-13 08:49:15,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154018984] [2024-09-13 08:49:15,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:15,408 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 08:49:15,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 08:49:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-09-13 08:49:15,409 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 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 08:49:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:15,531 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2024-09-13 08:49:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 08:49:15,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 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 28 [2024-09-13 08:49:15,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:15,534 INFO L225 Difference]: With dead ends: 101 [2024-09-13 08:49:15,534 INFO L226 Difference]: Without dead ends: 90 [2024-09-13 08:49:15,534 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 17 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-09-13 08:49:15,534 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:15,535 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 150 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:15,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-13 08:49:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2024-09-13 08:49:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 78 states have internal predecessors, (96), 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 08:49:15,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2024-09-13 08:49:15,588 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 28 [2024-09-13 08:49:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:15,588 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2024-09-13 08:49:15,589 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 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 08:49:15,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2024-09-13 08:49:15,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-13 08:49:15,589 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:15,589 INFO L216 NwaCegarLoop]: trace histogram [8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:15,603 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 08:49:15,790 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:15,790 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:15,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:15,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1371434858, now seen corresponding path program 15 times [2024-09-13 08:49:15,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:15,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910665217] [2024-09-13 08:49:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:15,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:15,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:49:15,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:15,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910665217] [2024-09-13 08:49:15,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910665217] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:15,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800555584] [2024-09-13 08:49:15,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:15,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:15,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:15,976 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 08:49:15,977 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 08:49:16,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 08:49:16,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:16,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:49:16,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:49:16,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:49:16,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800555584] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:16,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:16,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 27 [2024-09-13 08:49:16,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174889699] [2024-09-13 08:49:16,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:16,363 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-13 08:49:16,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:16,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-13 08:49:16,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-09-13 08:49:16,364 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 08:49:17,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:17,371 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2024-09-13 08:49:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-13 08:49:17,371 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 28 [2024-09-13 08:49:17,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:17,372 INFO L225 Difference]: With dead ends: 127 [2024-09-13 08:49:17,372 INFO L226 Difference]: Without dead ends: 106 [2024-09-13 08:49:17,373 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=373, Invalid=2933, Unknown=0, NotChecked=0, Total=3306 [2024-09-13 08:49:17,374 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:17,374 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 264 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:49:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-13 08:49:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2024-09-13 08:49:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 91 states have internal predecessors, (109), 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 08:49:17,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2024-09-13 08:49:17,406 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 28 [2024-09-13 08:49:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:17,406 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2024-09-13 08:49:17,406 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 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 08:49:17,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2024-09-13 08:49:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-13 08:49:17,407 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:17,407 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:17,419 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 08:49:17,607 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:17,608 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:17,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash -160836781, now seen corresponding path program 16 times [2024-09-13 08:49:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:17,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357429295] [2024-09-13 08:49:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:17,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:17,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:49:17,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:17,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357429295] [2024-09-13 08:49:17,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357429295] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:17,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60830767] [2024-09-13 08:49:17,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:49:17,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:17,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:17,854 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 08:49:17,855 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 08:49:17,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:49:17,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:17,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 08:49:17,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:49:17,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:49:18,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60830767] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:18,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:18,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 10] total 29 [2024-09-13 08:49:18,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154997342] [2024-09-13 08:49:18,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:18,135 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-13 08:49:18,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:18,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-13 08:49:18,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2024-09-13 08:49:18,136 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 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 08:49:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:18,647 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2024-09-13 08:49:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-13 08:49:18,647 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 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 08:49:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:18,649 INFO L225 Difference]: With dead ends: 172 [2024-09-13 08:49:18,650 INFO L226 Difference]: Without dead ends: 161 [2024-09-13 08:49:18,651 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1560, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:49:18,651 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 130 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:18,651 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 240 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:49:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-13 08:49:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 97. [2024-09-13 08:49:18,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 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 08:49:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2024-09-13 08:49:18,697 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 29 [2024-09-13 08:49:18,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:18,698 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2024-09-13 08:49:18,698 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 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 08:49:18,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2024-09-13 08:49:18,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 08:49:18,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:18,699 INFO L216 NwaCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:18,711 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:18,899 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-13 08:49:18,899 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:18,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:18,900 INFO L85 PathProgramCache]: Analyzing trace with hash -511416493, now seen corresponding path program 17 times [2024-09-13 08:49:18,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:18,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997278276] [2024-09-13 08:49:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:18,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:19,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 08:49:19,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:19,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997278276] [2024-09-13 08:49:19,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997278276] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:19,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223966029] [2024-09-13 08:49:19,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:49:19,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:19,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:19,071 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 08:49:19,073 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 08:49:19,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-13 08:49:19,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:19,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 08:49:19,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 08:49:19,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 08:49:19,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223966029] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:19,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:19,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2024-09-13 08:49:19,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283301986] [2024-09-13 08:49:19,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:19,597 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 08:49:19,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:19,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 08:49:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2024-09-13 08:49:19,600 INFO L87 Difference]: Start difference. First operand 97 states and 113 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 08:49:20,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:20,255 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2024-09-13 08:49:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-13 08:49:20,255 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 31 [2024-09-13 08:49:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:20,256 INFO L225 Difference]: With dead ends: 171 [2024-09-13 08:49:20,256 INFO L226 Difference]: Without dead ends: 150 [2024-09-13 08:49:20,257 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=446, Invalid=1716, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 08:49:20,257 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 87 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:20,258 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 195 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:49:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-13 08:49:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 94. [2024-09-13 08:49:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 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 08:49:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2024-09-13 08:49:20,300 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 31 [2024-09-13 08:49:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:20,300 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2024-09-13 08:49:20,301 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 08:49:20,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:20,301 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2024-09-13 08:49:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 08:49:20,301 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:20,301 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:20,314 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 08:49:20,502 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-13 08:49:20,502 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:20,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:20,502 INFO L85 PathProgramCache]: Analyzing trace with hash -769153695, now seen corresponding path program 18 times [2024-09-13 08:49:20,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:20,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652747793] [2024-09-13 08:49:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:20,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:20,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 08:49:20,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:20,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652747793] [2024-09-13 08:49:20,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652747793] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:20,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329139845] [2024-09-13 08:49:20,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:49:20,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:20,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:20,720 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 08:49:20,722 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 08:49:20,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-13 08:49:20,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:20,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 08:49:20,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 08:49:20,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 08:49:20,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329139845] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:20,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:20,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2024-09-13 08:49:20,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824565293] [2024-09-13 08:49:20,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:20,996 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 08:49:20,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:20,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 08:49:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-09-13 08:49:20,996 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 2 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 08:49:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:21,176 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2024-09-13 08:49:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 08:49:21,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 2 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 31 [2024-09-13 08:49:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:21,178 INFO L225 Difference]: With dead ends: 149 [2024-09-13 08:49:21,178 INFO L226 Difference]: Without dead ends: 137 [2024-09-13 08:49:21,178 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 19 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-09-13 08:49:21,178 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:21,179 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 165 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:21,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-09-13 08:49:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 105. [2024-09-13 08:49:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.21) internal successors, (121), 100 states have internal predecessors, (121), 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 08:49:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2024-09-13 08:49:21,227 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 31 [2024-09-13 08:49:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:21,228 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2024-09-13 08:49:21,228 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 2 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 08:49:21,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2024-09-13 08:49:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 08:49:21,229 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:21,231 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:21,245 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:21,432 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-13 08:49:21,432 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:21,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:21,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1253123073, now seen corresponding path program 19 times [2024-09-13 08:49:21,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:21,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494945768] [2024-09-13 08:49:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:21,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:21,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:49:21,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494945768] [2024-09-13 08:49:21,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494945768] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:21,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641834242] [2024-09-13 08:49:21,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:49:21,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:21,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:21,647 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 08:49:21,648 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 08:49:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:21,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-13 08:49:21,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 08:49:21,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 08:49:22,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641834242] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:22,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:22,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 34 [2024-09-13 08:49:22,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071567330] [2024-09-13 08:49:22,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:22,214 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-13 08:49:22,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:22,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-13 08:49:22,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 08:49:22,216 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 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 08:49:27,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:27,229 INFO L93 Difference]: Finished difference Result 237 states and 293 transitions. [2024-09-13 08:49:27,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-09-13 08:49:27,230 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 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 33 [2024-09-13 08:49:27,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:27,231 INFO L225 Difference]: With dead ends: 237 [2024-09-13 08:49:27,231 INFO L226 Difference]: Without dead ends: 194 [2024-09-13 08:49:27,235 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4587 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2042, Invalid=13708, Unknown=0, NotChecked=0, Total=15750 [2024-09-13 08:49:27,236 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 388 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:27,236 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 232 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 08:49:27,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-09-13 08:49:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 131. [2024-09-13 08:49:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.2380952380952381) internal successors, (156), 126 states have internal predecessors, (156), 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 08:49:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 160 transitions. [2024-09-13 08:49:27,304 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 160 transitions. Word has length 33 [2024-09-13 08:49:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:27,304 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 160 transitions. [2024-09-13 08:49:27,305 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 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 08:49:27,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 160 transitions. [2024-09-13 08:49:27,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 08:49:27,305 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:27,305 INFO L216 NwaCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:27,317 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-13 08:49:27,506 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-13 08:49:27,506 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:27,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:27,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1779115071, now seen corresponding path program 20 times [2024-09-13 08:49:27,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:27,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386314215] [2024-09-13 08:49:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:27,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:27,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 08:49:27,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:27,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386314215] [2024-09-13 08:49:27,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386314215] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:27,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457488497] [2024-09-13 08:49:27,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:27,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:27,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:27,749 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 08:49:27,751 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 08:49:27,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:27,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:27,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-13 08:49:27,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 08:49:27,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-13 08:49:28,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457488497] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:28,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:28,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 33 [2024-09-13 08:49:28,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036202083] [2024-09-13 08:49:28,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:28,212 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-13 08:49:28,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-13 08:49:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 08:49:28,213 INFO L87 Difference]: Start difference. First operand 131 states and 160 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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 08:49:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:29,431 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2024-09-13 08:49:29,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-13 08:49:29,431 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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 08:49:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:29,432 INFO L225 Difference]: With dead ends: 156 [2024-09-13 08:49:29,432 INFO L226 Difference]: Without dead ends: 139 [2024-09-13 08:49:29,433 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=469, Invalid=3313, Unknown=0, NotChecked=0, Total=3782 [2024-09-13 08:49:29,434 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:29,434 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 301 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:49:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-13 08:49:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2024-09-13 08:49:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 124 states have internal predecessors, (149), 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 08:49:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2024-09-13 08:49:29,498 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 33 [2024-09-13 08:49:29,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:29,498 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2024-09-13 08:49:29,498 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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 08:49:29,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2024-09-13 08:49:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 08:49:29,499 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:29,499 INFO L216 NwaCegarLoop]: trace histogram [11, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:29,511 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 08:49:29,699 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-13 08:49:29,700 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:29,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:29,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1898873598, now seen corresponding path program 21 times [2024-09-13 08:49:29,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:29,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895972660] [2024-09-13 08:49:29,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:29,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:29,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-13 08:49:29,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:29,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895972660] [2024-09-13 08:49:29,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895972660] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:29,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323366994] [2024-09-13 08:49:29,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:29,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:29,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:29,978 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 08:49:29,979 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 08:49:30,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 08:49:30,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:30,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 08:49:30,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 08:49:30,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 08:49:30,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323366994] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:30,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:30,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 35 [2024-09-13 08:49:30,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21558560] [2024-09-13 08:49:30,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:30,517 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-13 08:49:30,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:30,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-13 08:49:30,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 08:49:30,519 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 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 08:49:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:32,296 INFO L93 Difference]: Finished difference Result 174 states and 210 transitions. [2024-09-13 08:49:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-09-13 08:49:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 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 33 [2024-09-13 08:49:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:32,297 INFO L225 Difference]: With dead ends: 174 [2024-09-13 08:49:32,297 INFO L226 Difference]: Without dead ends: 162 [2024-09-13 08:49:32,299 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1288, Invalid=6194, Unknown=0, NotChecked=0, Total=7482 [2024-09-13 08:49:32,300 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 202 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:32,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 314 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:49:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-13 08:49:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2024-09-13 08:49:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 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 08:49:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2024-09-13 08:49:32,384 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 33 [2024-09-13 08:49:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:32,384 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2024-09-13 08:49:32,384 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 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 08:49:32,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2024-09-13 08:49:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-13 08:49:32,385 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:32,385 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:32,405 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:32,591 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-13 08:49:32,592 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:32,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:32,592 INFO L85 PathProgramCache]: Analyzing trace with hash 158453958, now seen corresponding path program 22 times [2024-09-13 08:49:32,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:32,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246984600] [2024-09-13 08:49:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:32,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:32,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 08:49:32,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:32,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246984600] [2024-09-13 08:49:32,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246984600] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:32,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590162001] [2024-09-13 08:49:32,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:49:32,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:32,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:32,858 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 08:49:32,860 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 08:49:32,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:49:32,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:32,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 08:49:32,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 08:49:32,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-13 08:49:33,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590162001] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:33,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:33,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2024-09-13 08:49:33,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310719304] [2024-09-13 08:49:33,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:33,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 08:49:33,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:33,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 08:49:33,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-13 08:49:33,148 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 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 08:49:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:33,328 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2024-09-13 08:49:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 08:49:33,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 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 34 [2024-09-13 08:49:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:33,329 INFO L225 Difference]: With dead ends: 157 [2024-09-13 08:49:33,329 INFO L226 Difference]: Without dead ends: 144 [2024-09-13 08:49:33,329 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 19 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:49:33,329 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:33,330 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 145 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-13 08:49:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2024-09-13 08:49:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.183206106870229) internal successors, (155), 131 states have internal predecessors, (155), 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 08:49:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2024-09-13 08:49:33,405 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 34 [2024-09-13 08:49:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:33,405 INFO L474 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2024-09-13 08:49:33,405 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 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 08:49:33,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2024-09-13 08:49:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 08:49:33,406 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:33,406 INFO L216 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:33,418 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-13 08:49:33,606 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-13 08:49:33,607 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:33,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:33,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1701774746, now seen corresponding path program 23 times [2024-09-13 08:49:33,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:33,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484607685] [2024-09-13 08:49:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:33,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:33,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-13 08:49:33,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:33,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484607685] [2024-09-13 08:49:33,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484607685] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:33,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738426234] [2024-09-13 08:49:33,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:49:33,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:33,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:33,853 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 08:49:33,855 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 08:49:34,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-13 08:49:34,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:34,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-13 08:49:34,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-13 08:49:34,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-13 08:49:34,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738426234] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:34,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:34,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2024-09-13 08:49:34,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036279528] [2024-09-13 08:49:34,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:34,575 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-13 08:49:34,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:34,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-13 08:49:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:49:34,576 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 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 08:49:36,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:36,086 INFO L93 Difference]: Finished difference Result 263 states and 301 transitions. [2024-09-13 08:49:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-09-13 08:49:36,086 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 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) Word has length 36 [2024-09-13 08:49:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:36,088 INFO L225 Difference]: With dead ends: 263 [2024-09-13 08:49:36,088 INFO L226 Difference]: Without dead ends: 239 [2024-09-13 08:49:36,090 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=975, Invalid=3855, Unknown=0, NotChecked=0, Total=4830 [2024-09-13 08:49:36,091 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:36,091 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 231 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:49:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-13 08:49:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 131. [2024-09-13 08:49:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 126 states have internal predecessors, (149), 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 08:49:36,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2024-09-13 08:49:36,190 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 36 [2024-09-13 08:49:36,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:36,190 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2024-09-13 08:49:36,191 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 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 08:49:36,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:36,191 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2024-09-13 08:49:36,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-13 08:49:36,191 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:36,192 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:36,209 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-13 08:49:36,392 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-13 08:49:36,392 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:36,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:36,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1044738881, now seen corresponding path program 24 times [2024-09-13 08:49:36,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:36,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870970036] [2024-09-13 08:49:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:36,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:36,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:49:36,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:36,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870970036] [2024-09-13 08:49:36,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870970036] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:36,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51360139] [2024-09-13 08:49:36,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:49:36,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:36,676 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 08:49:36,678 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 08:49:36,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 08:49:36,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:36,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 08:49:36,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:49:36,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:49:37,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51360139] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:37,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:37,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-13 08:49:37,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690018328] [2024-09-13 08:49:37,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:37,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 08:49:37,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:37,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 08:49:37,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:49:37,007 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 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 08:49:37,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:37,257 INFO L93 Difference]: Finished difference Result 206 states and 237 transitions. [2024-09-13 08:49:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 08:49:37,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 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 37 [2024-09-13 08:49:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:37,258 INFO L225 Difference]: With dead ends: 206 [2024-09-13 08:49:37,258 INFO L226 Difference]: Without dead ends: 192 [2024-09-13 08:49:37,259 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 23 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-09-13 08:49:37,259 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:37,259 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 207 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-09-13 08:49:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2024-09-13 08:49:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2097902097902098) internal successors, (173), 143 states have internal predecessors, (173), 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 08:49:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 177 transitions. [2024-09-13 08:49:37,348 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 177 transitions. Word has length 37 [2024-09-13 08:49:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:37,348 INFO L474 AbstractCegarLoop]: Abstraction has 148 states and 177 transitions. [2024-09-13 08:49:37,348 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 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 08:49:37,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 177 transitions. [2024-09-13 08:49:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 08:49:37,349 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:37,349 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:37,361 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 08:49:37,549 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:37,549 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:37,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:37,550 INFO L85 PathProgramCache]: Analyzing trace with hash -939864138, now seen corresponding path program 25 times [2024-09-13 08:49:37,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:37,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426930160] [2024-09-13 08:49:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:37,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:37,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:49:37,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:37,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426930160] [2024-09-13 08:49:37,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426930160] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:37,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352966836] [2024-09-13 08:49:37,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:49:37,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:37,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:37,835 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 08:49:37,836 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 08:49:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:37,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 08:49:37,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:49:37,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:49:38,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352966836] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:38,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:38,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 40 [2024-09-13 08:49:38,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934601339] [2024-09-13 08:49:38,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:38,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-13 08:49:38,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:38,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-13 08:49:38,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 08:49:38,489 INFO L87 Difference]: Start difference. First operand 148 states and 177 transitions. Second operand has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 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 08:49:50,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:50,665 INFO L93 Difference]: Finished difference Result 312 states and 375 transitions. [2024-09-13 08:49:50,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2024-09-13 08:49:50,666 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 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 38 [2024-09-13 08:49:50,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:50,667 INFO L225 Difference]: With dead ends: 312 [2024-09-13 08:49:50,667 INFO L226 Difference]: Without dead ends: 260 [2024-09-13 08:49:50,672 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9895 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=4521, Invalid=25235, Unknown=0, NotChecked=0, Total=29756 [2024-09-13 08:49:50,672 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 692 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:50,672 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 224 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 08:49:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-09-13 08:49:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 159. [2024-09-13 08:49:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.2077922077922079) internal successors, (186), 154 states have internal predecessors, (186), 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 08:49:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2024-09-13 08:49:50,773 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 38 [2024-09-13 08:49:50,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:50,773 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2024-09-13 08:49:50,773 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 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 08:49:50,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:50,774 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2024-09-13 08:49:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-13 08:49:50,774 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:50,774 INFO L216 NwaCegarLoop]: trace histogram [15, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:50,791 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 08:49:50,978 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:50,979 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:50,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash -981807486, now seen corresponding path program 26 times [2024-09-13 08:49:50,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:50,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713392666] [2024-09-13 08:49:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:50,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:51,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 08:49:51,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:51,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713392666] [2024-09-13 08:49:51,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713392666] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:51,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986525484] [2024-09-13 08:49:51,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:49:51,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:51,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:51,335 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 08:49:51,335 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 08:49:51,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:49:51,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:51,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-13 08:49:51,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 08:49:51,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-13 08:49:51,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986525484] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:51,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:51,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 14] total 42 [2024-09-13 08:49:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474698458] [2024-09-13 08:49:51,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:51,852 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-13 08:49:51,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-13 08:49:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:49:51,853 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 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 08:49:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:54,651 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2024-09-13 08:49:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-09-13 08:49:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 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 39 [2024-09-13 08:49:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:54,653 INFO L225 Difference]: With dead ends: 249 [2024-09-13 08:49:54,653 INFO L226 Difference]: Without dead ends: 222 [2024-09-13 08:49:54,654 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=867, Invalid=8835, Unknown=0, NotChecked=0, Total=9702 [2024-09-13 08:49:54,654 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 84 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:54,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 484 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 08:49:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-13 08:49:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 186. [2024-09-13 08:49:54,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.160220994475138) internal successors, (210), 181 states have internal predecessors, (210), 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 08:49:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2024-09-13 08:49:54,779 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 39 [2024-09-13 08:49:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:54,779 INFO L474 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2024-09-13 08:49:54,780 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 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 08:49:54,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:54,780 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2024-09-13 08:49:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-13 08:49:54,781 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:54,781 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:54,797 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-13 08:49:54,982 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:54,982 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:54,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:54,982 INFO L85 PathProgramCache]: Analyzing trace with hash -316344474, now seen corresponding path program 27 times [2024-09-13 08:49:54,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:54,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531475792] [2024-09-13 08:49:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:54,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:55,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:49:55,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:55,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531475792] [2024-09-13 08:49:55,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531475792] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:55,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637927227] [2024-09-13 08:49:55,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:49:55,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:55,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:55,295 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 08:49:55,297 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 08:49:55,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-13 08:49:55,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:55,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-13 08:49:55,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:49:55,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:49:55,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637927227] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:55,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:55,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2024-09-13 08:49:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094214357] [2024-09-13 08:49:55,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:55,740 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 08:49:55,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 08:49:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2024-09-13 08:49:55,741 INFO L87 Difference]: Start difference. First operand 186 states and 214 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 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 08:49:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:49:56,058 INFO L93 Difference]: Finished difference Result 225 states and 258 transitions. [2024-09-13 08:49:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 08:49:56,059 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 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 40 [2024-09-13 08:49:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:49:56,060 INFO L225 Difference]: With dead ends: 225 [2024-09-13 08:49:56,060 INFO L226 Difference]: Without dead ends: 210 [2024-09-13 08:49:56,060 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 25 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-09-13 08:49:56,060 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:49:56,060 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 268 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:49:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-09-13 08:49:56,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2024-09-13 08:49:56,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.1631578947368422) internal successors, (221), 190 states have internal predecessors, (221), 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 08:49:56,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 225 transitions. [2024-09-13 08:49:56,201 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 225 transitions. Word has length 40 [2024-09-13 08:49:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:49:56,201 INFO L474 AbstractCegarLoop]: Abstraction has 195 states and 225 transitions. [2024-09-13 08:49:56,201 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 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 08:49:56,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:56,201 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 225 transitions. [2024-09-13 08:49:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 08:49:56,202 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:49:56,202 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:49:56,215 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 08:49:56,402 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-13 08:49:56,402 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:49:56,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:49:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash -325611725, now seen corresponding path program 28 times [2024-09-13 08:49:56,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:49:56,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588471339] [2024-09-13 08:49:56,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:49:56,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:49:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:56,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:49:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:49:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:49:56,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:49:56,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588471339] [2024-09-13 08:49:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588471339] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:49:56,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739212684] [2024-09-13 08:49:56,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:49:56,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:49:56,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:49:56,726 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 08:49:56,728 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 08:49:56,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:49:56,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:49:56,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-13 08:49:56,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:49:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:49:56,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:49:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:49:57,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739212684] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:49:57,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:49:57,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 44 [2024-09-13 08:49:57,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925366882] [2024-09-13 08:49:57,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:49:57,476 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 08:49:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:49:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 08:49:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:49:57,477 INFO L87 Difference]: Start difference. First operand 195 states and 225 transitions. Second operand has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 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 08:50:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:16,892 INFO L93 Difference]: Finished difference Result 404 states and 469 transitions. [2024-09-13 08:50:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2024-09-13 08:50:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 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 41 [2024-09-13 08:50:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:16,894 INFO L225 Difference]: With dead ends: 404 [2024-09-13 08:50:16,894 INFO L226 Difference]: Without dead ends: 349 [2024-09-13 08:50:16,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14929 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=6503, Invalid=36139, Unknown=0, NotChecked=0, Total=42642 [2024-09-13 08:50:16,897 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 852 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:16,897 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 286 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 08:50:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-13 08:50:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 209. [2024-09-13 08:50:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.1764705882352942) internal successors, (240), 204 states have internal predecessors, (240), 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 08:50:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 244 transitions. [2024-09-13 08:50:17,059 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 244 transitions. Word has length 41 [2024-09-13 08:50:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:17,059 INFO L474 AbstractCegarLoop]: Abstraction has 209 states and 244 transitions. [2024-09-13 08:50:17,059 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 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 08:50:17,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 244 transitions. [2024-09-13 08:50:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 08:50:17,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:17,060 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:17,073 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 08:50:17,260 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-13 08:50:17,261 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:17,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:17,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1065646369, now seen corresponding path program 29 times [2024-09-13 08:50:17,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:17,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703903619] [2024-09-13 08:50:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:17,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:17,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 08:50:17,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:17,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703903619] [2024-09-13 08:50:17,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703903619] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178128478] [2024-09-13 08:50:17,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:50:17,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:17,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:17,602 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 08:50:17,603 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 08:50:17,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-13 08:50:17,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:17,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 08:50:17,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 08:50:17,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 08:50:17,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178128478] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:17,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:17,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2024-09-13 08:50:17,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103921918] [2024-09-13 08:50:17,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:17,999 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 08:50:17,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:17,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 08:50:17,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2024-09-13 08:50:17,999 INFO L87 Difference]: Start difference. First operand 209 states and 244 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 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 08:50:18,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:18,374 INFO L93 Difference]: Finished difference Result 251 states and 292 transitions. [2024-09-13 08:50:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 08:50:18,375 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 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 43 [2024-09-13 08:50:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:18,376 INFO L225 Difference]: With dead ends: 251 [2024-09-13 08:50:18,376 INFO L226 Difference]: Without dead ends: 235 [2024-09-13 08:50:18,376 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 25 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2024-09-13 08:50:18,377 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:18,377 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 307 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:50:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-13 08:50:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 220. [2024-09-13 08:50:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1813953488372093) internal successors, (254), 215 states have internal predecessors, (254), 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 08:50:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 258 transitions. [2024-09-13 08:50:18,591 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 258 transitions. Word has length 43 [2024-09-13 08:50:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:18,591 INFO L474 AbstractCegarLoop]: Abstraction has 220 states and 258 transitions. [2024-09-13 08:50:18,591 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 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 08:50:18,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 258 transitions. [2024-09-13 08:50:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 08:50:18,592 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:18,593 INFO L216 NwaCegarLoop]: trace histogram [16, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:18,609 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 08:50:18,793 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-13 08:50:18,794 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:18,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:18,794 INFO L85 PathProgramCache]: Analyzing trace with hash -133663071, now seen corresponding path program 30 times [2024-09-13 08:50:18,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:18,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451509383] [2024-09-13 08:50:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:18,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:19,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:50:19,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:19,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451509383] [2024-09-13 08:50:19,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451509383] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:19,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075915383] [2024-09-13 08:50:19,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:50:19,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:19,198 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 08:50:19,199 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 08:50:19,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-13 08:50:19,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:19,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-13 08:50:19,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:50:19,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-09-13 08:50:19,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075915383] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:19,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:19,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 16] total 47 [2024-09-13 08:50:19,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133903058] [2024-09-13 08:50:19,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:19,907 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 08:50:19,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:19,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 08:50:19,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 08:50:19,908 INFO L87 Difference]: Start difference. First operand 220 states and 258 transitions. Second operand has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 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 08:50:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:23,580 INFO L93 Difference]: Finished difference Result 284 states and 339 transitions. [2024-09-13 08:50:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-13 08:50:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 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 08:50:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:23,582 INFO L225 Difference]: With dead ends: 284 [2024-09-13 08:50:23,582 INFO L226 Difference]: Without dead ends: 240 [2024-09-13 08:50:23,583 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3156 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1183, Invalid=12389, Unknown=0, NotChecked=0, Total=13572 [2024-09-13 08:50:23,583 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:23,584 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 556 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 08:50:23,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-09-13 08:50:23,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2024-09-13 08:50:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.1598173515981736) internal successors, (254), 219 states have internal predecessors, (254), 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 08:50:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 258 transitions. [2024-09-13 08:50:23,751 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 258 transitions. Word has length 43 [2024-09-13 08:50:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:23,752 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 258 transitions. [2024-09-13 08:50:23,752 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 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 08:50:23,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 258 transitions. [2024-09-13 08:50:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 08:50:23,753 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:23,753 INFO L216 NwaCegarLoop]: trace histogram [17, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:23,765 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-13 08:50:23,953 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-13 08:50:23,953 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:23,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:23,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1260222622, now seen corresponding path program 31 times [2024-09-13 08:50:23,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:23,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955790387] [2024-09-13 08:50:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:23,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:24,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-13 08:50:24,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:24,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955790387] [2024-09-13 08:50:24,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955790387] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:24,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885826493] [2024-09-13 08:50:24,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:50:24,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:24,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:24,366 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 08:50:24,366 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 08:50:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:24,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-13 08:50:24,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:50:24,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-13 08:50:24,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885826493] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:24,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:24,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 16] total 49 [2024-09-13 08:50:24,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44373356] [2024-09-13 08:50:24,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:24,992 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-13 08:50:24,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:24,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-13 08:50:24,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1886, Unknown=0, NotChecked=0, Total=2352 [2024-09-13 08:50:24,993 INFO L87 Difference]: Start difference. First operand 224 states and 258 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:27,124 INFO L93 Difference]: Finished difference Result 409 states and 484 transitions. [2024-09-13 08:50:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-09-13 08:50:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-13 08:50:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:27,126 INFO L225 Difference]: With dead ends: 409 [2024-09-13 08:50:27,126 INFO L226 Difference]: Without dead ends: 395 [2024-09-13 08:50:27,127 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2360, Invalid=7342, Unknown=0, NotChecked=0, Total=9702 [2024-09-13 08:50:27,127 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 309 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:27,127 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 542 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 08:50:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-09-13 08:50:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 223. [2024-09-13 08:50:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.146788990825688) internal successors, (250), 218 states have internal predecessors, (250), 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 08:50:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2024-09-13 08:50:27,361 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 43 [2024-09-13 08:50:27,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:27,362 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2024-09-13 08:50:27,362 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:50:27,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:27,362 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2024-09-13 08:50:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 08:50:27,363 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:27,363 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:27,380 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-13 08:50:27,563 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-13 08:50:27,564 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:27,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash -535534058, now seen corresponding path program 32 times [2024-09-13 08:50:27,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:27,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920702911] [2024-09-13 08:50:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:27,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:27,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 08:50:27,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:27,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920702911] [2024-09-13 08:50:27,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920702911] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:27,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301088167] [2024-09-13 08:50:27,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:50:27,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:27,903 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 08:50:27,904 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 08:50:27,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:50:27,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:27,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 08:50:27,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:50:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 08:50:28,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:50:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 08:50:28,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301088167] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:50:28,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:50:28,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 48 [2024-09-13 08:50:28,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326398837] [2024-09-13 08:50:28,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:50:28,706 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 08:50:28,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:50:28,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 08:50:28,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:50:28,707 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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 08:50:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:50:59,062 INFO L93 Difference]: Finished difference Result 463 states and 527 transitions. [2024-09-13 08:50:59,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2024-09-13 08:50:59,062 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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 08:50:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:50:59,064 INFO L225 Difference]: With dead ends: 463 [2024-09-13 08:50:59,064 INFO L226 Difference]: Without dead ends: 399 [2024-09-13 08:50:59,067 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21643 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=9078, Invalid=50214, Unknown=0, NotChecked=0, Total=59292 [2024-09-13 08:50:59,068 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 1046 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:50:59,068 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 299 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-13 08:50:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-09-13 08:50:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 238. [2024-09-13 08:50:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.1587982832618027) internal successors, (270), 233 states have internal predecessors, (270), 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 08:50:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 274 transitions. [2024-09-13 08:50:59,263 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 274 transitions. Word has length 44 [2024-09-13 08:50:59,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:50:59,264 INFO L474 AbstractCegarLoop]: Abstraction has 238 states and 274 transitions. [2024-09-13 08:50:59,264 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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 08:50:59,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 274 transitions. [2024-09-13 08:50:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 08:50:59,265 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:50:59,265 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:50:59,279 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 08:50:59,465 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-13 08:50:59,465 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:50:59,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:50:59,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1831492090, now seen corresponding path program 33 times [2024-09-13 08:50:59,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:50:59,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090427604] [2024-09-13 08:50:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:50:59,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:50:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:59,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:50:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:50:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 08:50:59,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:50:59,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090427604] [2024-09-13 08:50:59,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090427604] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:50:59,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599294822] [2024-09-13 08:50:59,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:50:59,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:50:59,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:50:59,843 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 08:50:59,844 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 08:50:59,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-13 08:50:59,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:50:59,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-13 08:50:59,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 08:51:00,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 08:51:00,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599294822] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:00,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:00,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2024-09-13 08:51:00,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461146167] [2024-09-13 08:51:00,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:00,264 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 08:51:00,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:00,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 08:51:00,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2024-09-13 08:51:00,264 INFO L87 Difference]: Start difference. First operand 238 states and 274 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 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 08:51:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:00,687 INFO L93 Difference]: Finished difference Result 280 states and 321 transitions. [2024-09-13 08:51:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 08:51:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 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 46 [2024-09-13 08:51:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:00,688 INFO L225 Difference]: With dead ends: 280 [2024-09-13 08:51:00,688 INFO L226 Difference]: Without dead ends: 263 [2024-09-13 08:51:00,689 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 29 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2024-09-13 08:51:00,689 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:00,689 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 299 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:51:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-09-13 08:51:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 249. [2024-09-13 08:51:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.1598360655737705) internal successors, (283), 244 states have internal predecessors, (283), 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 08:51:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2024-09-13 08:51:00,897 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 46 [2024-09-13 08:51:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:00,898 INFO L474 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2024-09-13 08:51:00,898 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 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 08:51:00,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2024-09-13 08:51:00,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 08:51:00,899 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:00,899 INFO L216 NwaCegarLoop]: trace histogram [18, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:00,911 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 08:51:01,099 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-13 08:51:01,100 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:01,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:01,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1201296938, now seen corresponding path program 34 times [2024-09-13 08:51:01,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:01,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037218428] [2024-09-13 08:51:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:01,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:01,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:51:01,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:01,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037218428] [2024-09-13 08:51:01,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037218428] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:01,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053521195] [2024-09-13 08:51:01,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:51:01,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:01,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:01,640 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 08:51:01,641 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 08:51:01,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:51:01,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:51:01,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-13 08:51:01,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:51:01,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-13 08:51:02,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053521195] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:02,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:02,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 18] total 53 [2024-09-13 08:51:02,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935602608] [2024-09-13 08:51:02,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:02,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-13 08:51:02,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:02,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-13 08:51:02,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2024-09-13 08:51:02,548 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 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 08:51:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:08,552 INFO L93 Difference]: Finished difference Result 319 states and 376 transitions. [2024-09-13 08:51:08,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-09-13 08:51:08,552 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 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 08:51:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:08,554 INFO L225 Difference]: With dead ends: 319 [2024-09-13 08:51:08,554 INFO L226 Difference]: Without dead ends: 279 [2024-09-13 08:51:08,555 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5249 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1655, Invalid=19225, Unknown=0, NotChecked=0, Total=20880 [2024-09-13 08:51:08,555 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:08,555 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 618 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2839 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 08:51:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-09-13 08:51:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 261. [2024-09-13 08:51:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.13671875) internal successors, (291), 256 states have internal predecessors, (291), 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 08:51:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 295 transitions. [2024-09-13 08:51:08,779 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 295 transitions. Word has length 46 [2024-09-13 08:51:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:08,779 INFO L474 AbstractCegarLoop]: Abstraction has 261 states and 295 transitions. [2024-09-13 08:51:08,779 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 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 08:51:08,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 295 transitions. [2024-09-13 08:51:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-13 08:51:08,780 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:08,780 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:08,796 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-13 08:51:08,980 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-13 08:51:08,981 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:08,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash 981523539, now seen corresponding path program 35 times [2024-09-13 08:51:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:08,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868892764] [2024-09-13 08:51:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:08,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:09,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 08:51:09,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:09,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868892764] [2024-09-13 08:51:09,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868892764] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:09,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008977806] [2024-09-13 08:51:09,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:51:09,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:09,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:09,435 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 08:51:09,436 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 08:51:10,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-13 08:51:10,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:51:10,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-13 08:51:10,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 08:51:10,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 08:51:11,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008977806] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:11,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:11,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 62 [2024-09-13 08:51:11,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679281807] [2024-09-13 08:51:11,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:11,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-13 08:51:11,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:11,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-13 08:51:11,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-13 08:51:11,122 INFO L87 Difference]: Start difference. First operand 261 states and 295 transitions. Second operand has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 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 08:51:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:16,867 INFO L93 Difference]: Finished difference Result 549 states and 622 transitions. [2024-09-13 08:51:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-09-13 08:51:16,867 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 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 47 [2024-09-13 08:51:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:16,869 INFO L225 Difference]: With dead ends: 549 [2024-09-13 08:51:16,869 INFO L226 Difference]: Without dead ends: 518 [2024-09-13 08:51:16,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3228, Invalid=13028, Unknown=0, NotChecked=0, Total=16256 [2024-09-13 08:51:16,870 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 368 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:16,870 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 353 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:51:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-09-13 08:51:17,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 296. [2024-09-13 08:51:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.1443298969072164) internal successors, (333), 291 states have internal predecessors, (333), 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 08:51:17,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 337 transitions. [2024-09-13 08:51:17,165 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 337 transitions. Word has length 47 [2024-09-13 08:51:17,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:17,165 INFO L474 AbstractCegarLoop]: Abstraction has 296 states and 337 transitions. [2024-09-13 08:51:17,165 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 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 08:51:17,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 337 transitions. [2024-09-13 08:51:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 08:51:17,166 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:17,166 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:17,179 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 08:51:17,367 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:17,367 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:17,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:17,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1882278143, now seen corresponding path program 36 times [2024-09-13 08:51:17,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:17,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982046090] [2024-09-13 08:51:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:17,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:17,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-13 08:51:17,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:17,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982046090] [2024-09-13 08:51:17,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982046090] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:17,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44569401] [2024-09-13 08:51:17,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:51:17,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:17,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:17,827 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 08:51:17,828 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 08:51:17,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-13 08:51:17,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:51:17,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-13 08:51:17,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:18,083 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-13 08:51:18,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-13 08:51:18,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44569401] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:18,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:18,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2024-09-13 08:51:18,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496723164] [2024-09-13 08:51:18,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:18,352 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 08:51:18,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:18,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 08:51:18,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2024-09-13 08:51:18,353 INFO L87 Difference]: Start difference. First operand 296 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 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 08:51:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:51:19,097 INFO L93 Difference]: Finished difference Result 469 states and 535 transitions. [2024-09-13 08:51:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 08:51:19,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 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 49 [2024-09-13 08:51:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:51:19,099 INFO L225 Difference]: With dead ends: 469 [2024-09-13 08:51:19,100 INFO L226 Difference]: Without dead ends: 451 [2024-09-13 08:51:19,100 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 80 SyntacticMatches, 31 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2024-09-13 08:51:19,100 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:51:19,100 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 353 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:51:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-09-13 08:51:19,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 332. [2024-09-13 08:51:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.1590214067278288) internal successors, (379), 327 states have internal predecessors, (379), 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 08:51:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 383 transitions. [2024-09-13 08:51:19,415 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 383 transitions. Word has length 49 [2024-09-13 08:51:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:51:19,415 INFO L474 AbstractCegarLoop]: Abstraction has 332 states and 383 transitions. [2024-09-13 08:51:19,416 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 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 08:51:19,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 383 transitions. [2024-09-13 08:51:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-13 08:51:19,417 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:51:19,417 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:51:19,433 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 08:51:19,617 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:19,617 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:51:19,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:51:19,618 INFO L85 PathProgramCache]: Analyzing trace with hash 202552438, now seen corresponding path program 37 times [2024-09-13 08:51:19,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:51:19,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126782996] [2024-09-13 08:51:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:51:19,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:51:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:20,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:51:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-13 08:51:20,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:51:20,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126782996] [2024-09-13 08:51:20,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126782996] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:51:20,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747856977] [2024-09-13 08:51:20,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:51:20,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:51:20,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:51:20,016 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 08:51:20,017 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 08:51:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:51:20,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 08:51:20,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:51:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-13 08:51:20,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:51:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-13 08:51:20,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747856977] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:51:20,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:51:20,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 56 [2024-09-13 08:51:20,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613699771] [2024-09-13 08:51:20,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:51:20,976 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-13 08:51:20,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:51:20,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-13 08:51:20,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2631, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 08:51:20,977 INFO L87 Difference]: Start difference. First operand 332 states and 383 transitions. Second operand has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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 08:52:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:32,189 INFO L93 Difference]: Finished difference Result 693 states and 810 transitions. [2024-09-13 08:52:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2024-09-13 08:52:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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 50 [2024-09-13 08:52:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:32,192 INFO L225 Difference]: With dead ends: 693 [2024-09-13 08:52:32,192 INFO L226 Difference]: Without dead ends: 586 [2024-09-13 08:52:32,195 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41658 ImplicationChecksByTransitivity, 69.3s TimeCoverageRelationStatistics Valid=16448, Invalid=90154, Unknown=0, NotChecked=0, Total=106602 [2024-09-13 08:52:32,196 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 1728 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:32,196 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 335 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-13 08:52:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2024-09-13 08:52:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 339. [2024-09-13 08:52:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 334 states have (on average 1.158682634730539) internal successors, (387), 334 states have internal predecessors, (387), 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 08:52:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 391 transitions. [2024-09-13 08:52:32,532 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 391 transitions. Word has length 50 [2024-09-13 08:52:32,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:32,533 INFO L474 AbstractCegarLoop]: Abstraction has 339 states and 391 transitions. [2024-09-13 08:52:32,533 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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 08:52:32,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:32,533 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 391 transitions. [2024-09-13 08:52:32,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 08:52:32,534 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:32,534 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:32,551 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-13 08:52:32,734 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:32,735 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:32,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:32,735 INFO L85 PathProgramCache]: Analyzing trace with hash -436609882, now seen corresponding path program 38 times [2024-09-13 08:52:32,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:32,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466960052] [2024-09-13 08:52:32,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:32,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:33,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-13 08:52:33,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:33,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466960052] [2024-09-13 08:52:33,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466960052] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:33,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91454370] [2024-09-13 08:52:33,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:52:33,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:33,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:33,225 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 08:52:33,226 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 08:52:33,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:52:33,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:52:33,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-13 08:52:33,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-13 08:52:33,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-13 08:52:33,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91454370] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:33,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:33,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2024-09-13 08:52:33,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615393899] [2024-09-13 08:52:33,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:33,703 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 08:52:33,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:33,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 08:52:33,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2024-09-13 08:52:33,704 INFO L87 Difference]: Start difference. First operand 339 states and 391 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 2 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 08:52:34,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:34,380 INFO L93 Difference]: Finished difference Result 424 states and 490 transitions. [2024-09-13 08:52:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 08:52:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 2 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 52 [2024-09-13 08:52:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:34,382 INFO L225 Difference]: With dead ends: 424 [2024-09-13 08:52:34,383 INFO L226 Difference]: Without dead ends: 405 [2024-09-13 08:52:34,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 85 SyntacticMatches, 33 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:52:34,383 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:34,383 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 399 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:52:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-09-13 08:52:34,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 351. [2024-09-13 08:52:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.1618497109826589) internal successors, (402), 346 states have internal predecessors, (402), 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 08:52:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 406 transitions. [2024-09-13 08:52:34,843 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 406 transitions. Word has length 52 [2024-09-13 08:52:34,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:34,844 INFO L474 AbstractCegarLoop]: Abstraction has 351 states and 406 transitions. [2024-09-13 08:52:34,844 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 2 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 08:52:34,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 406 transitions. [2024-09-13 08:52:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 08:52:34,845 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:34,845 INFO L216 NwaCegarLoop]: trace histogram [22, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:34,862 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 08:52:35,046 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-13 08:52:35,046 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:35,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:35,046 INFO L85 PathProgramCache]: Analyzing trace with hash -428518713, now seen corresponding path program 39 times [2024-09-13 08:52:35,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:35,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161710255] [2024-09-13 08:52:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:35,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:35,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 08:52:35,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161710255] [2024-09-13 08:52:35,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161710255] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:35,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551212096] [2024-09-13 08:52:35,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:52:35,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:35,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:35,718 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 08:52:35,719 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 08:52:35,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-13 08:52:35,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:52:35,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 08:52:35,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-13 08:52:36,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-13 08:52:37,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551212096] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:37,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:37,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 20, 20] total 61 [2024-09-13 08:52:37,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101314878] [2024-09-13 08:52:37,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:37,106 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-13 08:52:37,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:37,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-13 08:52:37,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3416, Unknown=0, NotChecked=0, Total=3660 [2024-09-13 08:52:37,107 INFO L87 Difference]: Start difference. First operand 351 states and 406 transitions. Second operand has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 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 08:52:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:50,459 INFO L93 Difference]: Finished difference Result 501 states and 611 transitions. [2024-09-13 08:52:50,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2024-09-13 08:52:50,459 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2024-09-13 08:52:50,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:50,461 INFO L225 Difference]: With dead ends: 501 [2024-09-13 08:52:50,461 INFO L226 Difference]: Without dead ends: 425 [2024-09-13 08:52:50,463 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16165 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=3240, Invalid=54120, Unknown=0, NotChecked=0, Total=57360 [2024-09-13 08:52:50,463 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 221 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 6824 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 7011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 6824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:50,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 854 Invalid, 7011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 6824 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-13 08:52:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-09-13 08:52:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 370. [2024-09-13 08:52:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.1424657534246576) internal successors, (417), 365 states have internal predecessors, (417), 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 08:52:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 421 transitions. [2024-09-13 08:52:50,866 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 421 transitions. Word has length 52 [2024-09-13 08:52:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:50,866 INFO L474 AbstractCegarLoop]: Abstraction has 370 states and 421 transitions. [2024-09-13 08:52:50,866 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 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 08:52:50,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 421 transitions. [2024-09-13 08:52:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-13 08:52:50,868 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:50,868 INFO L216 NwaCegarLoop]: trace histogram [23, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:50,880 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 08:52:51,068 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:51,068 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:51,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:51,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1732839874, now seen corresponding path program 40 times [2024-09-13 08:52:51,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:51,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732580774] [2024-09-13 08:52:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:51,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:51,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:52:51,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:51,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732580774] [2024-09-13 08:52:51,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732580774] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:51,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512360513] [2024-09-13 08:52:51,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:52:51,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:51,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:51,718 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 08:52:51,719 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 08:52:51,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:52:51,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:52:51,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-13 08:52:51,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:52:52,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-13 08:52:52,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512360513] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:52,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:52,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 20] total 63 [2024-09-13 08:52:52,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26588606] [2024-09-13 08:52:52,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:52,726 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-13 08:52:52,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:52,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-13 08:52:52,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=3162, Unknown=0, NotChecked=0, Total=3906 [2024-09-13 08:52:52,728 INFO L87 Difference]: Start difference. First operand 370 states and 421 transitions. Second operand has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 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 08:52:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:52:57,416 INFO L93 Difference]: Finished difference Result 720 states and 838 transitions. [2024-09-13 08:52:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2024-09-13 08:52:57,416 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 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 53 [2024-09-13 08:52:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:52:57,419 INFO L225 Difference]: With dead ends: 720 [2024-09-13 08:52:57,419 INFO L226 Difference]: Without dead ends: 702 [2024-09-13 08:52:57,421 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5119, Invalid=15761, Unknown=0, NotChecked=0, Total=20880 [2024-09-13 08:52:57,421 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 576 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 3198 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 3198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:52:57,421 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 787 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 3198 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 08:52:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2024-09-13 08:52:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 376. [2024-09-13 08:52:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.1320754716981132) internal successors, (420), 371 states have internal predecessors, (420), 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 08:52:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 424 transitions. [2024-09-13 08:52:57,819 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 424 transitions. Word has length 53 [2024-09-13 08:52:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:52:57,819 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 424 transitions. [2024-09-13 08:52:57,820 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 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 08:52:57,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 424 transitions. [2024-09-13 08:52:57,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-13 08:52:57,821 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:52:57,821 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:52:57,844 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-09-13 08:52:58,025 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:58,026 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:52:58,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:52:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1452158177, now seen corresponding path program 41 times [2024-09-13 08:52:58,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:52:58,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626232613] [2024-09-13 08:52:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:52:58,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:52:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:58,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:52:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:52:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-13 08:52:58,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:52:58,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626232613] [2024-09-13 08:52:58,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626232613] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:52:58,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074627355] [2024-09-13 08:52:58,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:52:58,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:52:58,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:52:58,427 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 08:52:58,429 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 08:52:59,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-13 08:52:59,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:52:59,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-13 08:52:59,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:52:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-13 08:52:59,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:52:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-13 08:52:59,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074627355] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:52:59,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:52:59,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2024-09-13 08:52:59,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964206730] [2024-09-13 08:52:59,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:52:59,585 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 08:52:59,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:52:59,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 08:52:59,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:52:59,586 INFO L87 Difference]: Start difference. First operand 376 states and 424 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 2 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 08:53:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:53:00,468 INFO L93 Difference]: Finished difference Result 459 states and 516 transitions. [2024-09-13 08:53:00,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 08:53:00,469 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 2 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 55 [2024-09-13 08:53:00,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:53:00,470 INFO L225 Difference]: With dead ends: 459 [2024-09-13 08:53:00,470 INFO L226 Difference]: Without dead ends: 439 [2024-09-13 08:53:00,470 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 90 SyntacticMatches, 35 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2024-09-13 08:53:00,471 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:53:00,471 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 470 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:53:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-09-13 08:53:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 388. [2024-09-13 08:53:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.133159268929504) internal successors, (434), 383 states have internal predecessors, (434), 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 08:53:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 438 transitions. [2024-09-13 08:53:00,969 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 438 transitions. Word has length 55 [2024-09-13 08:53:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:53:00,969 INFO L474 AbstractCegarLoop]: Abstraction has 388 states and 438 transitions. [2024-09-13 08:53:00,969 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 2 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 08:53:00,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:53:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 438 transitions. [2024-09-13 08:53:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-13 08:53:00,971 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:53:00,971 INFO L216 NwaCegarLoop]: trace histogram [24, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:53:00,985 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-09-13 08:53:01,171 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-09-13 08:53:01,171 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:53:01,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:53:01,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1240281910, now seen corresponding path program 42 times [2024-09-13 08:53:01,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:53:01,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352416088] [2024-09-13 08:53:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:53:01,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:53:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:53:01,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:53:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:53:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-13 08:53:01,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:53:01,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352416088] [2024-09-13 08:53:01,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352416088] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:53:01,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136707845] [2024-09-13 08:53:01,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:53:01,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:53:01,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:53:01,881 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 08:53:01,882 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 08:53:02,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-13 08:53:02,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:53:02,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-13 08:53:02,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:53:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-09-13 08:53:02,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:53:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-09-13 08:53:03,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136707845] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:53:03,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:53:03,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 22, 22] total 67 [2024-09-13 08:53:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36263228] [2024-09-13 08:53:03,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:53:03,646 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-13 08:53:03,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:53:03,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-13 08:53:03,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4142, Unknown=0, NotChecked=0, Total=4422 [2024-09-13 08:53:03,647 INFO L87 Difference]: Start difference. First operand 388 states and 438 transitions. Second operand has 67 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 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)