./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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 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 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:40:39,638 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:40:39,689 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:40:39,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:40:39,696 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:40:39,725 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:40:39,725 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:40:39,726 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:40:39,726 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:40:39,727 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:40:39,728 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:40:39,728 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:40:39,729 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:40:39,729 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:40:39,730 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:40:39,731 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:40:39,731 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:40:39,731 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:40:39,731 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:40:39,731 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:40:39,731 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:40:39,732 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:40:39,732 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:40:39,732 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:40:39,732 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:40:39,732 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:40:39,733 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:40:39,733 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:40:39,733 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:40:39,733 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:40:39,733 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:40:39,733 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:40:39,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:40:39,734 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:40:39,734 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:40:39,734 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:40:39,734 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:40:39,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:40:39,735 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:40:39,735 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:40:39,735 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:40:39,738 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:40:39,738 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:40:39,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:40:39,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:40:39,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:40:39,935 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:40:39,935 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:40:39,936 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de32.c [2024-09-18 15:40:41,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:40:41,412 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:40:41,412 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de32.c [2024-09-18 15:40:41,420 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/df9d36f8e/d0be8fd7584241d4b8e83da325f9f051/FLAG01d68f44b [2024-09-18 15:40:41,823 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/df9d36f8e/d0be8fd7584241d4b8e83da325f9f051 [2024-09-18 15:40:41,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:40:41,826 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:40:41,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:40:41,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:40:41,831 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:40:41,832 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:40:41" (1/1) ... [2024-09-18 15:40:41,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d7afe4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:41, skipping insertion in model container [2024-09-18 15:40:41,832 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:40:41" (1/1) ... [2024-09-18 15:40:41,847 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:40:41,968 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2024-09-18 15:40:41,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:40:41,998 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:40:42,007 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2024-09-18 15:40:42,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:40:42,028 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:40:42,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42 WrapperNode [2024-09-18 15:40:42,029 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:40:42,030 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:40:42,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:40:42,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:40:42,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,041 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,046 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:40:42,046 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:40:42,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:40:42,047 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:40:42,047 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:40:42,054 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,055 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,063 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]. [2024-09-18 15:40:42,063 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,065 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,068 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,068 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,069 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,070 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:40:42,070 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:40:42,070 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:40:42,071 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:40:42,071 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (1/1) ... [2024-09-18 15:40:42,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:40:42,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:42,100 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) [2024-09-18 15:40:42,104 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 [2024-09-18 15:40:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:40:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:40:42,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:40:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:40:42,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:40:42,137 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:40:42,138 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:40:42,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:40:42,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:40:42,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:40:42,184 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:40:42,186 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:40:42,290 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-18 15:40:42,290 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:40:42,308 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:40:42,308 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-18 15:40:42,309 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:40:42 BoogieIcfgContainer [2024-09-18 15:40:42,309 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:40:42,310 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:40:42,310 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:40:42,313 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:40:42,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:40:41" (1/3) ... [2024-09-18 15:40:42,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fa5d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:40:42, skipping insertion in model container [2024-09-18 15:40:42,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:40:42" (2/3) ... [2024-09-18 15:40:42,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fa5d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:40:42, skipping insertion in model container [2024-09-18 15:40:42,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:40:42" (3/3) ... [2024-09-18 15:40:42,315 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de32.c [2024-09-18 15:40:42,332 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:40:42,332 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:40:42,423 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:40:42,429 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;@78125f5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:40:42,429 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:40:42,433 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) [2024-09-18 15:40:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-18 15:40:42,438 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:42,439 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:42,439 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:42,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:42,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1284096195, now seen corresponding path program 1 times [2024-09-18 15:40:42,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:42,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139629115] [2024-09-18 15:40:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:42,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:42,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:42,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139629115] [2024-09-18 15:40:42,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139629115] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:40:42,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:40:42,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:40:42,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452588849] [2024-09-18 15:40:42,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:40:42,572 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:40:42,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:42,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:40:42,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:40:42,591 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) [2024-09-18 15:40:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:42,608 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-09-18 15:40:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:40:42,609 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 [2024-09-18 15:40:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:42,614 INFO L225 Difference]: With dead ends: 34 [2024-09-18 15:40:42,614 INFO L226 Difference]: Without dead ends: 14 [2024-09-18 15:40:42,616 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 [2024-09-18 15:40:42,618 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 [2024-09-18 15:40:42,619 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] [2024-09-18 15:40:42,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-18 15:40:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-18 15:40:42,639 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) [2024-09-18 15:40:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-09-18 15:40:42,641 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 13 [2024-09-18 15:40:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:42,641 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-09-18 15:40:42,641 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) [2024-09-18 15:40:42,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-09-18 15:40:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-18 15:40:42,642 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:42,643 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:42,643 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:40:42,643 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:42,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:42,644 INFO L85 PathProgramCache]: Analyzing trace with hash 334597057, now seen corresponding path program 1 times [2024-09-18 15:40:42,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:42,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669702683] [2024-09-18 15:40:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:42,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:42,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:42,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:42,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669702683] [2024-09-18 15:40:42,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669702683] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:40:42,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:40:42,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:40:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324982114] [2024-09-18 15:40:42,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:40:42,811 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:40:42,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:42,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:40:42,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:40:42,813 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) [2024-09-18 15:40:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:42,847 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-09-18 15:40:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:40:42,848 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 [2024-09-18 15:40:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:42,849 INFO L225 Difference]: With dead ends: 21 [2024-09-18 15:40:42,849 INFO L226 Difference]: Without dead ends: 16 [2024-09-18 15:40:42,849 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 [2024-09-18 15:40:42,850 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 [2024-09-18 15:40:42,850 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] [2024-09-18 15:40:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-18 15:40:42,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-18 15:40:42,854 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) [2024-09-18 15:40:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-09-18 15:40:42,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2024-09-18 15:40:42,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:42,855 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-09-18 15:40:42,855 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) [2024-09-18 15:40:42,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:42,855 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-09-18 15:40:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-18 15:40:42,856 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:42,856 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:42,856 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:40:42,857 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:42,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1818111943, now seen corresponding path program 1 times [2024-09-18 15:40:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:42,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450345836] [2024-09-18 15:40:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:42,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:42,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:42,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450345836] [2024-09-18 15:40:42,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450345836] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:40:42,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:40:42,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 15:40:42,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142700319] [2024-09-18 15:40:42,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:40:42,901 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 15:40:42,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:42,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 15:40:42,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:40:42,902 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) [2024-09-18 15:40:42,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:42,914 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-09-18 15:40:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 15:40:42,915 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 [2024-09-18 15:40:42,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:42,915 INFO L225 Difference]: With dead ends: 28 [2024-09-18 15:40:42,915 INFO L226 Difference]: Without dead ends: 21 [2024-09-18 15:40:42,916 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 [2024-09-18 15:40:42,917 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 [2024-09-18 15:40:42,917 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] [2024-09-18 15:40:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-18 15:40:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-18 15:40:42,922 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) [2024-09-18 15:40:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-18 15:40:42,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2024-09-18 15:40:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:42,923 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-18 15:40:42,923 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) [2024-09-18 15:40:42,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-18 15:40:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-18 15:40:42,924 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:42,925 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:42,925 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 15:40:42,925 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:42,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:42,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1074026954, now seen corresponding path program 1 times [2024-09-18 15:40:42,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:42,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054822291] [2024-09-18 15:40:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:42,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:42,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:42,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:42,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054822291] [2024-09-18 15:40:42,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054822291] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:40:42,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:40:42,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 15:40:42,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670721531] [2024-09-18 15:40:42,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:40:42,975 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 15:40:42,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:42,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 15:40:42,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-18 15:40:42,976 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) [2024-09-18 15:40:42,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:42,996 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-09-18 15:40:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 15:40:42,996 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 [2024-09-18 15:40:42,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:42,997 INFO L225 Difference]: With dead ends: 26 [2024-09-18 15:40:42,997 INFO L226 Difference]: Without dead ends: 17 [2024-09-18 15:40:42,998 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 [2024-09-18 15:40:42,998 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 [2024-09-18 15:40:42,999 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] [2024-09-18 15:40:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-18 15:40:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-18 15:40:43,002 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) [2024-09-18 15:40:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-09-18 15:40:43,003 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2024-09-18 15:40:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:43,003 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-09-18 15:40:43,003 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) [2024-09-18 15:40:43,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-09-18 15:40:43,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-18 15:40:43,004 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:43,004 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:43,005 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-18 15:40:43,005 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:43,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash 161814611, now seen corresponding path program 1 times [2024-09-18 15:40:43,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:43,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549998854] [2024-09-18 15:40:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:43,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:43,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:43,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:43,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549998854] [2024-09-18 15:40:43,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549998854] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:43,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955091061] [2024-09-18 15:40:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:43,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:43,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:43,076 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) [2024-09-18 15:40:43,077 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:40:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:43,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-18 15:40:43,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:43,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:43,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955091061] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:43,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:40:43,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-18 15:40:43,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98170382] [2024-09-18 15:40:43,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:40:43,272 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 15:40:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 15:40:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:40:43,273 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) [2024-09-18 15:40:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:43,294 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-09-18 15:40:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 15:40:43,294 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 [2024-09-18 15:40:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:43,295 INFO L225 Difference]: With dead ends: 23 [2024-09-18 15:40:43,295 INFO L226 Difference]: Without dead ends: 16 [2024-09-18 15:40:43,295 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 [2024-09-18 15:40:43,296 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 [2024-09-18 15:40:43,296 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] [2024-09-18 15:40:43,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-18 15:40:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-18 15:40:43,299 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) [2024-09-18 15:40:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-18 15:40:43,299 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 15 [2024-09-18 15:40:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:43,300 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-18 15:40:43,300 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) [2024-09-18 15:40:43,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-18 15:40:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-18 15:40:43,301 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:43,301 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:43,313 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 15:40:43,504 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 [2024-09-18 15:40:43,505 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:43,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:43,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1564643010, now seen corresponding path program 1 times [2024-09-18 15:40:43,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:43,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674900721] [2024-09-18 15:40:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:43,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:43,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:43,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:43,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674900721] [2024-09-18 15:40:43,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674900721] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:43,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483772825] [2024-09-18 15:40:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:43,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:43,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:43,564 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) [2024-09-18 15:40:43,565 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:40:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:43,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-18 15:40:43,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:43,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:43,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483772825] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:43,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:40:43,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2024-09-18 15:40:43,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140833476] [2024-09-18 15:40:43,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:40:43,641 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-18 15:40:43,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:43,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-18 15:40:43,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:40:43,642 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) [2024-09-18 15:40:43,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:43,651 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-09-18 15:40:43,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-18 15:40:43,652 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 [2024-09-18 15:40:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:43,655 INFO L225 Difference]: With dead ends: 22 [2024-09-18 15:40:43,655 INFO L226 Difference]: Without dead ends: 17 [2024-09-18 15:40:43,656 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 [2024-09-18 15:40:43,656 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 [2024-09-18 15:40:43,656 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] [2024-09-18 15:40:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-18 15:40:43,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-18 15:40:43,659 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) [2024-09-18 15:40:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-09-18 15:40:43,659 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2024-09-18 15:40:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:43,660 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-09-18 15:40:43,660 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) [2024-09-18 15:40:43,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-09-18 15:40:43,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-18 15:40:43,661 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:43,661 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:43,673 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 15:40:43,865 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 [2024-09-18 15:40:43,866 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:43,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1294830822, now seen corresponding path program 1 times [2024-09-18 15:40:43,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:43,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366384797] [2024-09-18 15:40:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:43,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:44,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:44,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:44,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366384797] [2024-09-18 15:40:44,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366384797] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:44,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019067305] [2024-09-18 15:40:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:44,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:44,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:44,009 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) [2024-09-18 15:40:44,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:40:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:44,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-18 15:40:44,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:44,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:44,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019067305] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:44,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:44,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-18 15:40:44,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470483212] [2024-09-18 15:40:44,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:44,164 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 15:40:44,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:44,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 15:40:44,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:40:44,165 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) [2024-09-18 15:40:44,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:44,192 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-09-18 15:40:44,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:40:44,193 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 [2024-09-18 15:40:44,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:44,193 INFO L225 Difference]: With dead ends: 25 [2024-09-18 15:40:44,193 INFO L226 Difference]: Without dead ends: 20 [2024-09-18 15:40:44,194 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:40:44,194 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 [2024-09-18 15:40:44,194 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] [2024-09-18 15:40:44,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-18 15:40:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-09-18 15:40:44,197 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) [2024-09-18 15:40:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-09-18 15:40:44,198 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2024-09-18 15:40:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:44,198 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-09-18 15:40:44,198 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) [2024-09-18 15:40:44,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-09-18 15:40:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-18 15:40:44,199 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:44,199 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:44,213 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:40:44,403 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 [2024-09-18 15:40:44,404 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:44,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1520587586, now seen corresponding path program 2 times [2024-09-18 15:40:44,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:44,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871216623] [2024-09-18 15:40:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:44,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:44,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:44,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:44,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871216623] [2024-09-18 15:40:44,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871216623] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:44,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118564553] [2024-09-18 15:40:44,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:40:44,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:44,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:44,470 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) [2024-09-18 15:40:44,471 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:40:44,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:40:44,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:44,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 15:40:44,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:44,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:44,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118564553] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:44,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:44,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-09-18 15:40:44,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248072453] [2024-09-18 15:40:44,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:44,578 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 15:40:44,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:44,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 15:40:44,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:40:44,579 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) [2024-09-18 15:40:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:44,660 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2024-09-18 15:40:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:40:44,661 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 [2024-09-18 15:40:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:44,663 INFO L225 Difference]: With dead ends: 60 [2024-09-18 15:40:44,663 INFO L226 Difference]: Without dead ends: 52 [2024-09-18 15:40:44,663 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:40:44,664 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-18 15:40:44,664 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] [2024-09-18 15:40:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-18 15:40:44,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2024-09-18 15:40:44,675 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) [2024-09-18 15:40:44,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2024-09-18 15:40:44,677 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 17 [2024-09-18 15:40:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:44,677 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2024-09-18 15:40:44,677 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) [2024-09-18 15:40:44,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2024-09-18 15:40:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-18 15:40:44,679 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:44,679 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:44,691 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 15:40:44,879 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 [2024-09-18 15:40:44,880 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:44,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:44,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2058594995, now seen corresponding path program 3 times [2024-09-18 15:40:44,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:44,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961939281] [2024-09-18 15:40:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:44,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:44,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:44,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:44,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961939281] [2024-09-18 15:40:44,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961939281] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:44,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748657311] [2024-09-18 15:40:44,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:40:44,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:44,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:44,928 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) [2024-09-18 15:40:44,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:40:44,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-18 15:40:44,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:44,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 15:40:44,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:44,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:45,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748657311] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:45,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:45,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-09-18 15:40:45,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423320178] [2024-09-18 15:40:45,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:45,045 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-18 15:40:45,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:45,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-18 15:40:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:40:45,045 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) [2024-09-18 15:40:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:45,165 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2024-09-18 15:40:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 15:40:45,165 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 [2024-09-18 15:40:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:45,166 INFO L225 Difference]: With dead ends: 56 [2024-09-18 15:40:45,166 INFO L226 Difference]: Without dead ends: 41 [2024-09-18 15:40:45,166 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:40:45,166 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:45,166 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:40:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-18 15:40:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-09-18 15:40:45,173 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) [2024-09-18 15:40:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2024-09-18 15:40:45,173 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 17 [2024-09-18 15:40:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:45,173 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2024-09-18 15:40:45,174 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) [2024-09-18 15:40:45,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2024-09-18 15:40:45,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-18 15:40:45,174 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:45,174 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:45,186 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-18 15:40:45,375 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 [2024-09-18 15:40:45,376 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:45,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:45,376 INFO L85 PathProgramCache]: Analyzing trace with hash 891793825, now seen corresponding path program 4 times [2024-09-18 15:40:45,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:45,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022642155] [2024-09-18 15:40:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:45,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:45,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:40:45,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:45,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022642155] [2024-09-18 15:40:45,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022642155] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:45,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364178303] [2024-09-18 15:40:45,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:40:45,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:45,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:45,505 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) [2024-09-18 15:40:45,509 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:40:45,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:40:45,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:45,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-18 15:40:45,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:40:45,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:40:45,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364178303] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:45,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:45,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-09-18 15:40:45,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248367700] [2024-09-18 15:40:45,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:45,637 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:40:45,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:45,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:40:45,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:40:45,638 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) [2024-09-18 15:40:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:45,683 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2024-09-18 15:40:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:40:45,683 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 [2024-09-18 15:40:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:45,684 INFO L225 Difference]: With dead ends: 59 [2024-09-18 15:40:45,684 INFO L226 Difference]: Without dead ends: 54 [2024-09-18 15:40:45,684 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:40:45,685 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:45,685 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 87 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:40:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-18 15:40:45,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2024-09-18 15:40:45,693 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) [2024-09-18 15:40:45,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2024-09-18 15:40:45,693 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 19 [2024-09-18 15:40:45,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:45,694 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2024-09-18 15:40:45,694 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) [2024-09-18 15:40:45,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2024-09-18 15:40:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:40:45,694 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:45,695 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:45,707 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-18 15:40:45,895 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 [2024-09-18 15:40:45,895 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:45,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1911342567, now seen corresponding path program 5 times [2024-09-18 15:40:45,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:45,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206102930] [2024-09-18 15:40:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:45,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:45,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:40:45,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:45,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206102930] [2024-09-18 15:40:45,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206102930] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:45,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606108504] [2024-09-18 15:40:45,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:40:45,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:45,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:45,950 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) [2024-09-18 15:40:45,951 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:40:45,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-18 15:40:45,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:45,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 15:40:45,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:40:46,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:40:46,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606108504] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:46,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:46,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2024-09-18 15:40:46,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615173685] [2024-09-18 15:40:46,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:46,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-18 15:40:46,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:46,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-18 15:40:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:40:46,048 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) [2024-09-18 15:40:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:46,151 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2024-09-18 15:40:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 15:40:46,151 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 [2024-09-18 15:40:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:46,152 INFO L225 Difference]: With dead ends: 88 [2024-09-18 15:40:46,152 INFO L226 Difference]: Without dead ends: 79 [2024-09-18 15:40:46,153 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 [2024-09-18 15:40:46,153 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 [2024-09-18 15:40:46,153 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] [2024-09-18 15:40:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-18 15:40:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2024-09-18 15:40:46,164 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) [2024-09-18 15:40:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2024-09-18 15:40:46,165 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 20 [2024-09-18 15:40:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:46,165 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2024-09-18 15:40:46,165 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) [2024-09-18 15:40:46,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2024-09-18 15:40:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:40:46,166 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:46,166 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:46,181 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 15:40:46,366 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 [2024-09-18 15:40:46,367 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:46,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:46,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1409703062, now seen corresponding path program 6 times [2024-09-18 15:40:46,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:46,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090007922] [2024-09-18 15:40:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:46,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:46,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:40:46,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:46,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090007922] [2024-09-18 15:40:46,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090007922] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:46,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761869976] [2024-09-18 15:40:46,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:40:46,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:46,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:46,462 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) [2024-09-18 15:40:46,466 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:40:46,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-18 15:40:46,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:46,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-18 15:40:46,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:40:46,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-18 15:40:46,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761869976] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:46,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:46,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-09-18 15:40:46,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517394905] [2024-09-18 15:40:46,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:46,886 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 15:40:46,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 15:40:46,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:40:46,887 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) [2024-09-18 15:40:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:47,048 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2024-09-18 15:40:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-18 15:40:47,049 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 [2024-09-18 15:40:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:47,054 INFO L225 Difference]: With dead ends: 80 [2024-09-18 15:40:47,054 INFO L226 Difference]: Without dead ends: 67 [2024-09-18 15:40:47,054 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:40:47,054 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 [2024-09-18 15:40:47,054 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] [2024-09-18 15:40:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-18 15:40:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2024-09-18 15:40:47,077 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) [2024-09-18 15:40:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2024-09-18 15:40:47,078 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 20 [2024-09-18 15:40:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:47,078 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2024-09-18 15:40:47,078 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) [2024-09-18 15:40:47,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2024-09-18 15:40:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:40:47,079 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:47,079 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:47,102 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-18 15:40:47,283 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 [2024-09-18 15:40:47,284 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:47,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:47,284 INFO L85 PathProgramCache]: Analyzing trace with hash -457266714, now seen corresponding path program 7 times [2024-09-18 15:40:47,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:47,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869528100] [2024-09-18 15:40:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:47,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:47,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:40:47,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:47,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869528100] [2024-09-18 15:40:47,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869528100] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:47,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456274557] [2024-09-18 15:40:47,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:40:47,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:47,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:47,403 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) [2024-09-18 15:40:47,407 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:40:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:47,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-18 15:40:47,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:40:47,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:40:47,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456274557] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:47,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:47,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2024-09-18 15:40:47,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785924219] [2024-09-18 15:40:47,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:47,529 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-18 15:40:47,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-18 15:40:47,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-18 15:40:47,530 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) [2024-09-18 15:40:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:47,622 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2024-09-18 15:40:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 15:40:47,622 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 [2024-09-18 15:40:47,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:47,623 INFO L225 Difference]: With dead ends: 61 [2024-09-18 15:40:47,623 INFO L226 Difference]: Without dead ends: 48 [2024-09-18 15:40:47,623 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 [2024-09-18 15:40:47,624 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 [2024-09-18 15:40:47,624 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] [2024-09-18 15:40:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-18 15:40:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-18 15:40:47,639 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) [2024-09-18 15:40:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2024-09-18 15:40:47,640 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 20 [2024-09-18 15:40:47,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:47,641 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2024-09-18 15:40:47,641 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) [2024-09-18 15:40:47,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2024-09-18 15:40:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-18 15:40:47,641 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:47,641 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:47,653 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 15:40:47,842 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 [2024-09-18 15:40:47,842 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:47,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2034432077, now seen corresponding path program 8 times [2024-09-18 15:40:47,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:47,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394577877] [2024-09-18 15:40:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:47,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:47,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:40:47,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:47,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394577877] [2024-09-18 15:40:47,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394577877] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:47,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956087327] [2024-09-18 15:40:47,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:40:47,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:47,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:47,938 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) [2024-09-18 15:40:47,940 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:40:47,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:40:47,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:47,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-18 15:40:47,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:48,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 15:40:48,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956087327] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:48,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:48,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 17 [2024-09-18 15:40:48,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092853712] [2024-09-18 15:40:48,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:48,063 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 15:40:48,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 15:40:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:40:48,064 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) [2024-09-18 15:40:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:48,215 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2024-09-18 15:40:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-18 15:40:48,215 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 [2024-09-18 15:40:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:48,216 INFO L225 Difference]: With dead ends: 75 [2024-09-18 15:40:48,216 INFO L226 Difference]: Without dead ends: 65 [2024-09-18 15:40:48,216 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:40:48,217 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 [2024-09-18 15:40:48,217 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] [2024-09-18 15:40:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-18 15:40:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2024-09-18 15:40:48,227 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) [2024-09-18 15:40:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-09-18 15:40:48,228 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 21 [2024-09-18 15:40:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:48,228 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-09-18 15:40:48,228 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) [2024-09-18 15:40:48,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-09-18 15:40:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-18 15:40:48,228 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:48,228 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:48,242 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-18 15:40:48,429 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 [2024-09-18 15:40:48,429 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:48,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:48,429 INFO L85 PathProgramCache]: Analyzing trace with hash 380377990, now seen corresponding path program 9 times [2024-09-18 15:40:48,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:48,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170876785] [2024-09-18 15:40:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:48,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:48,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:48,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:40:48,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:48,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170876785] [2024-09-18 15:40:48,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170876785] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:48,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344580620] [2024-09-18 15:40:48,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:40:48,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:48,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:48,587 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) [2024-09-18 15:40:48,588 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 15:40:48,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:40:48,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:48,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-18 15:40:48,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:40:48,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:40:48,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344580620] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:48,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:48,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2024-09-18 15:40:48,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849490426] [2024-09-18 15:40:48,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:48,730 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-18 15:40:48,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-18 15:40:48,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-18 15:40:48,731 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) [2024-09-18 15:40:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:48,795 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2024-09-18 15:40:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:40:48,796 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 [2024-09-18 15:40:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:48,796 INFO L225 Difference]: With dead ends: 87 [2024-09-18 15:40:48,796 INFO L226 Difference]: Without dead ends: 78 [2024-09-18 15:40:48,797 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:40:48,797 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:48,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:40:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-18 15:40:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2024-09-18 15:40:48,809 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) [2024-09-18 15:40:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-18 15:40:48,809 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 22 [2024-09-18 15:40:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:48,809 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-18 15:40:48,809 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) [2024-09-18 15:40:48,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-18 15:40:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-18 15:40:48,810 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:48,810 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:48,823 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-18 15:40:49,014 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 [2024-09-18 15:40:49,014 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:49,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash 571398099, now seen corresponding path program 10 times [2024-09-18 15:40:49,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:49,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741395332] [2024-09-18 15:40:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:49,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:49,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:40:49,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:49,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741395332] [2024-09-18 15:40:49,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741395332] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:49,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108483911] [2024-09-18 15:40:49,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:40:49,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:49,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:49,094 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) [2024-09-18 15:40:49,095 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 15:40:49,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:40:49,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:49,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-18 15:40:49,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:40:49,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:40:49,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108483911] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:49,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:49,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2024-09-18 15:40:49,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656941470] [2024-09-18 15:40:49,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:49,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-18 15:40:49,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:49,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-18 15:40:49,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:40:49,300 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) [2024-09-18 15:40:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:49,998 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2024-09-18 15:40:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-18 15:40:49,998 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 [2024-09-18 15:40:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:49,999 INFO L225 Difference]: With dead ends: 96 [2024-09-18 15:40:49,999 INFO L226 Difference]: Without dead ends: 74 [2024-09-18 15:40:50,000 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2024-09-18 15:40:50,000 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:50,000 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 135 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:40:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-18 15:40:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2024-09-18 15:40:50,013 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) [2024-09-18 15:40:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-18 15:40:50,013 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 23 [2024-09-18 15:40:50,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:50,013 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-18 15:40:50,013 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) [2024-09-18 15:40:50,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:50,014 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-18 15:40:50,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-18 15:40:50,014 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:50,014 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:50,031 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-18 15:40:50,214 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 [2024-09-18 15:40:50,215 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:50,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:50,215 INFO L85 PathProgramCache]: Analyzing trace with hash 247533441, now seen corresponding path program 11 times [2024-09-18 15:40:50,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:50,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607470992] [2024-09-18 15:40:50,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:50,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:50,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:40:50,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:50,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607470992] [2024-09-18 15:40:50,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607470992] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:50,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889706530] [2024-09-18 15:40:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:40:50,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:50,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:50,369 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) [2024-09-18 15:40:50,370 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-18 15:40:50,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-18 15:40:50,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:50,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-18 15:40:50,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:40:50,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:40:50,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889706530] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:50,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:50,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2024-09-18 15:40:50,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501268335] [2024-09-18 15:40:50,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:50,575 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 15:40:50,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:50,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 15:40:50,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:40:50,576 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) [2024-09-18 15:40:50,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:50,688 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2024-09-18 15:40:50,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:40:50,688 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 [2024-09-18 15:40:50,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:50,689 INFO L225 Difference]: With dead ends: 87 [2024-09-18 15:40:50,693 INFO L226 Difference]: Without dead ends: 77 [2024-09-18 15:40:50,693 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:40:50,694 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 [2024-09-18 15:40:50,694 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] [2024-09-18 15:40:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-18 15:40:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2024-09-18 15:40:50,719 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) [2024-09-18 15:40:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-09-18 15:40:50,721 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 25 [2024-09-18 15:40:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:50,721 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-09-18 15:40:50,721 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) [2024-09-18 15:40:50,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-09-18 15:40:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-18 15:40:50,722 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:50,722 INFO L216 NwaCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:50,742 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-18 15:40:50,922 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 [2024-09-18 15:40:50,923 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:50,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:50,923 INFO L85 PathProgramCache]: Analyzing trace with hash -874703007, now seen corresponding path program 12 times [2024-09-18 15:40:50,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:50,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060684523] [2024-09-18 15:40:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:50,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:51,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:40:51,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:51,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060684523] [2024-09-18 15:40:51,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060684523] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:51,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379114710] [2024-09-18 15:40:51,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:40:51,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:51,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:51,086 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) [2024-09-18 15:40:51,091 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-18 15:40:51,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-18 15:40:51,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:51,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-18 15:40:51,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:40:51,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-18 15:40:51,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379114710] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:51,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:51,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2024-09-18 15:40:51,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051866515] [2024-09-18 15:40:51,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:51,364 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:40:51,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:51,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:40:51,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:40:51,365 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) [2024-09-18 15:40:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:51,741 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-09-18 15:40:51,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-18 15:40:51,742 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 [2024-09-18 15:40:51,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:51,742 INFO L225 Difference]: With dead ends: 89 [2024-09-18 15:40:51,742 INFO L226 Difference]: Without dead ends: 76 [2024-09-18 15:40:51,743 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 [2024-09-18 15:40:51,743 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:51,743 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 126 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:40:51,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-18 15:40:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2024-09-18 15:40:51,757 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) [2024-09-18 15:40:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2024-09-18 15:40:51,758 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 25 [2024-09-18 15:40:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:51,758 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2024-09-18 15:40:51,758 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) [2024-09-18 15:40:51,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2024-09-18 15:40:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-18 15:40:51,759 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:51,759 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:51,771 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-18 15:40:51,963 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 [2024-09-18 15:40:51,964 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:51,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1920087306, now seen corresponding path program 13 times [2024-09-18 15:40:51,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:51,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642592381] [2024-09-18 15:40:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:51,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:52,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:40:52,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:52,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642592381] [2024-09-18 15:40:52,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642592381] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:52,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107648481] [2024-09-18 15:40:52,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:40:52,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:52,122 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) [2024-09-18 15:40:52,123 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-18 15:40:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:52,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 15:40:52,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:40:52,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:40:52,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107648481] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:52,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:52,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 24 [2024-09-18 15:40:52,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166320692] [2024-09-18 15:40:52,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:52,379 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 15:40:52,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:52,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 15:40:52,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-09-18 15:40:52,380 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) [2024-09-18 15:40:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:53,739 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2024-09-18 15:40:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-18 15:40:53,739 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 [2024-09-18 15:40:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:53,740 INFO L225 Difference]: With dead ends: 134 [2024-09-18 15:40:53,740 INFO L226 Difference]: Without dead ends: 108 [2024-09-18 15:40:53,741 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=678, Invalid=3744, Unknown=0, NotChecked=0, Total=4422 [2024-09-18 15:40:53,742 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 [2024-09-18 15:40:53,742 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] [2024-09-18 15:40:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-18 15:40:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2024-09-18 15:40:53,758 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) [2024-09-18 15:40:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2024-09-18 15:40:53,758 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 26 [2024-09-18 15:40:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:53,759 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2024-09-18 15:40:53,759 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) [2024-09-18 15:40:53,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2024-09-18 15:40:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-18 15:40:53,759 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:53,759 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:53,771 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-18 15:40:53,963 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 [2024-09-18 15:40:53,964 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:53,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1321611814, now seen corresponding path program 14 times [2024-09-18 15:40:53,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:53,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925496377] [2024-09-18 15:40:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:53,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:54,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 15:40:54,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:54,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925496377] [2024-09-18 15:40:54,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925496377] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:54,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864674451] [2024-09-18 15:40:54,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:40:54,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:54,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:54,127 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) [2024-09-18 15:40:54,137 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-18 15:40:54,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:40:54,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:54,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-18 15:40:54,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 15:40:54,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-18 15:40:54,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864674451] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:54,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:54,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-09-18 15:40:54,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739400022] [2024-09-18 15:40:54,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:54,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-18 15:40:54,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:54,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-18 15:40:54,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:40:54,299 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) [2024-09-18 15:40:54,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:54,395 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2024-09-18 15:40:54,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-18 15:40:54,395 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 [2024-09-18 15:40:54,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:54,396 INFO L225 Difference]: With dead ends: 101 [2024-09-18 15:40:54,396 INFO L226 Difference]: Without dead ends: 90 [2024-09-18 15:40:54,396 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 14 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:40:54,397 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 [2024-09-18 15:40:54,397 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] [2024-09-18 15:40:54,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-18 15:40:54,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2024-09-18 15:40:54,415 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) [2024-09-18 15:40:54,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2024-09-18 15:40:54,415 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 28 [2024-09-18 15:40:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:54,415 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2024-09-18 15:40:54,415 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) [2024-09-18 15:40:54,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2024-09-18 15:40:54,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-18 15:40:54,416 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:54,416 INFO L216 NwaCegarLoop]: trace histogram [8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:54,427 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-18 15:40:54,616 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 [2024-09-18 15:40:54,616 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:54,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:54,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1371434858, now seen corresponding path program 15 times [2024-09-18 15:40:54,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:54,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046218579] [2024-09-18 15:40:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:54,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:54,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:40:54,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:54,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046218579] [2024-09-18 15:40:54,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046218579] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:54,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736207111] [2024-09-18 15:40:54,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:40:54,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:54,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:54,770 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) [2024-09-18 15:40:54,771 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-18 15:40:54,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-18 15:40:54,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:54,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-18 15:40:54,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:40:54,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:40:55,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736207111] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:55,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:55,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 27 [2024-09-18 15:40:55,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220883593] [2024-09-18 15:40:55,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:55,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-18 15:40:55,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:55,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-18 15:40:55,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-09-18 15:40:55,083 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) [2024-09-18 15:40:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:55,973 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2024-09-18 15:40:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-18 15:40:55,974 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 [2024-09-18 15:40:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:55,975 INFO L225 Difference]: With dead ends: 127 [2024-09-18 15:40:55,975 INFO L226 Difference]: Without dead ends: 106 [2024-09-18 15:40:55,975 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=373, Invalid=2933, Unknown=0, NotChecked=0, Total=3306 [2024-09-18 15:40:55,976 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, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:40:55,976 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 264 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:40:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-18 15:40:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2024-09-18 15:40:55,999 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) [2024-09-18 15:40:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2024-09-18 15:40:55,999 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 28 [2024-09-18 15:40:55,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:55,999 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2024-09-18 15:40:56,000 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) [2024-09-18 15:40:56,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:56,000 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2024-09-18 15:40:56,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-18 15:40:56,000 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:56,000 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:56,012 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-18 15:40:56,204 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 [2024-09-18 15:40:56,205 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:56,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:56,205 INFO L85 PathProgramCache]: Analyzing trace with hash -160836781, now seen corresponding path program 16 times [2024-09-18 15:40:56,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:56,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440199532] [2024-09-18 15:40:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:56,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:56,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-18 15:40:56,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:56,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440199532] [2024-09-18 15:40:56,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440199532] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:56,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565334414] [2024-09-18 15:40:56,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:40:56,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:56,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:56,401 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) [2024-09-18 15:40:56,404 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-18 15:40:56,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:40:56,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:56,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 15:40:56,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:40:56,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:40:56,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565334414] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:56,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:56,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 10] total 29 [2024-09-18 15:40:56,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938340069] [2024-09-18 15:40:56,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:56,684 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-18 15:40:56,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:56,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-18 15:40:56,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2024-09-18 15:40:56,686 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) [2024-09-18 15:40:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:57,184 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2024-09-18 15:40:57,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-18 15:40:57,185 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 [2024-09-18 15:40:57,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:57,186 INFO L225 Difference]: With dead ends: 172 [2024-09-18 15:40:57,186 INFO L226 Difference]: Without dead ends: 161 [2024-09-18 15:40:57,187 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 [2024-09-18 15:40:57,187 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 [2024-09-18 15:40:57,187 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] [2024-09-18 15:40:57,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-18 15:40:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 97. [2024-09-18 15:40:57,235 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) [2024-09-18 15:40:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2024-09-18 15:40:57,236 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 29 [2024-09-18 15:40:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:57,236 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2024-09-18 15:40:57,236 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) [2024-09-18 15:40:57,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2024-09-18 15:40:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 15:40:57,237 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:57,237 INFO L216 NwaCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:57,251 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-18 15:40:57,438 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 [2024-09-18 15:40:57,438 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:57,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash -511416493, now seen corresponding path program 17 times [2024-09-18 15:40:57,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:57,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251276846] [2024-09-18 15:40:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:57,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:57,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 15:40:57,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:57,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251276846] [2024-09-18 15:40:57,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251276846] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:57,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230559004] [2024-09-18 15:40:57,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:40:57,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:57,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:57,569 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) [2024-09-18 15:40:57,578 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-18 15:40:57,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-18 15:40:57,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:57,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 15:40:57,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 15:40:57,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-18 15:40:58,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230559004] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:58,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:58,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2024-09-18 15:40:58,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688620927] [2024-09-18 15:40:58,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:58,035 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-18 15:40:58,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:58,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-18 15:40:58,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2024-09-18 15:40:58,036 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) [2024-09-18 15:40:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:58,673 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2024-09-18 15:40:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-18 15:40:58,673 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 [2024-09-18 15:40:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:58,674 INFO L225 Difference]: With dead ends: 171 [2024-09-18 15:40:58,674 INFO L226 Difference]: Without dead ends: 150 [2024-09-18 15:40:58,675 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 [2024-09-18 15:40:58,675 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 [2024-09-18 15:40:58,676 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] [2024-09-18 15:40:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-18 15:40:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 94. [2024-09-18 15:40:58,707 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) [2024-09-18 15:40:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2024-09-18 15:40:58,708 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 31 [2024-09-18 15:40:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:58,708 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2024-09-18 15:40:58,708 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) [2024-09-18 15:40:58,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2024-09-18 15:40:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 15:40:58,709 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:58,709 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:58,721 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-18 15:40:58,913 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 [2024-09-18 15:40:58,913 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:58,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:58,914 INFO L85 PathProgramCache]: Analyzing trace with hash -769153695, now seen corresponding path program 18 times [2024-09-18 15:40:58,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:58,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385574468] [2024-09-18 15:40:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:58,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:59,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:40:59,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:59,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385574468] [2024-09-18 15:40:59,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385574468] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:59,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443364508] [2024-09-18 15:40:59,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:40:59,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:59,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:59,082 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) [2024-09-18 15:40:59,083 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-18 15:40:59,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-18 15:40:59,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:40:59,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-18 15:40:59,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:40:59,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:40:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:40:59,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443364508] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:40:59,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:40:59,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2024-09-18 15:40:59,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383295030] [2024-09-18 15:40:59,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:40:59,297 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 15:40:59,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:40:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 15:40:59,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:40:59,298 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) [2024-09-18 15:40:59,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:40:59,441 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2024-09-18 15:40:59,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-18 15:40:59,442 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 [2024-09-18 15:40:59,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:40:59,442 INFO L225 Difference]: With dead ends: 149 [2024-09-18 15:40:59,443 INFO L226 Difference]: Without dead ends: 137 [2024-09-18 15:40:59,443 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 16 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-09-18 15:40:59,443 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 [2024-09-18 15:40:59,443 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] [2024-09-18 15:40:59,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-09-18 15:40:59,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 105. [2024-09-18 15:40:59,475 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) [2024-09-18 15:40:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2024-09-18 15:40:59,476 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 31 [2024-09-18 15:40:59,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:40:59,476 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2024-09-18 15:40:59,476 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) [2024-09-18 15:40:59,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2024-09-18 15:40:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-18 15:40:59,477 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:40:59,477 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:40:59,489 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-18 15:40:59,681 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 [2024-09-18 15:40:59,682 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:40:59,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:40:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1253123073, now seen corresponding path program 19 times [2024-09-18 15:40:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:40:59,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500006476] [2024-09-18 15:40:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:40:59,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:40:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:59,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:40:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-18 15:40:59,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:40:59,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500006476] [2024-09-18 15:40:59,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500006476] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:40:59,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745044606] [2024-09-18 15:40:59,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:40:59,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:40:59,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:40:59,849 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) [2024-09-18 15:40:59,851 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-18 15:40:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:40:59,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-18 15:40:59,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:40:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:40:59,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:41:00,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745044606] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:00,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:00,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 34 [2024-09-18 15:41:00,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664737454] [2024-09-18 15:41:00,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:00,305 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-18 15:41:00,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-18 15:41:00,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 15:41:00,308 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) [2024-09-18 15:41:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:05,029 INFO L93 Difference]: Finished difference Result 237 states and 293 transitions. [2024-09-18 15:41:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-09-18 15:41:05,029 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 [2024-09-18 15:41:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:05,034 INFO L225 Difference]: With dead ends: 237 [2024-09-18 15:41:05,034 INFO L226 Difference]: Without dead ends: 194 [2024-09-18 15:41:05,036 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4587 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2042, Invalid=13708, Unknown=0, NotChecked=0, Total=15750 [2024-09-18 15:41:05,037 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 [2024-09-18 15:41:05,037 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] [2024-09-18 15:41:05,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-09-18 15:41:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 131. [2024-09-18 15:41:05,092 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) [2024-09-18 15:41:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 160 transitions. [2024-09-18 15:41:05,092 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 160 transitions. Word has length 33 [2024-09-18 15:41:05,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:05,093 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 160 transitions. [2024-09-18 15:41:05,093 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) [2024-09-18 15:41:05,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 160 transitions. [2024-09-18 15:41:05,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-18 15:41:05,093 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:05,094 INFO L216 NwaCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:05,114 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-18 15:41:05,297 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 [2024-09-18 15:41:05,298 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:05,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:05,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1779115071, now seen corresponding path program 20 times [2024-09-18 15:41:05,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:05,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577752537] [2024-09-18 15:41:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:05,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:05,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:41:05,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:05,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577752537] [2024-09-18 15:41:05,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577752537] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:05,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347948067] [2024-09-18 15:41:05,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:41:05,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:05,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:05,574 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) [2024-09-18 15:41:05,582 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-18 15:41:05,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:41:05,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:05,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-18 15:41:05,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:41:05,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-18 15:41:05,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347948067] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:05,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:05,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 33 [2024-09-18 15:41:05,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591324769] [2024-09-18 15:41:05,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:05,926 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-18 15:41:05,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:05,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-18 15:41:05,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-09-18 15:41:05,927 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) [2024-09-18 15:41:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:07,090 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2024-09-18 15:41:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-18 15:41:07,091 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 [2024-09-18 15:41:07,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:07,092 INFO L225 Difference]: With dead ends: 156 [2024-09-18 15:41:07,092 INFO L226 Difference]: Without dead ends: 139 [2024-09-18 15:41:07,093 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=469, Invalid=3313, Unknown=0, NotChecked=0, Total=3782 [2024-09-18 15:41:07,093 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 [2024-09-18 15:41:07,093 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] [2024-09-18 15:41:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-18 15:41:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2024-09-18 15:41:07,139 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) [2024-09-18 15:41:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2024-09-18 15:41:07,140 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 33 [2024-09-18 15:41:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:07,140 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2024-09-18 15:41:07,140 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) [2024-09-18 15:41:07,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2024-09-18 15:41:07,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-18 15:41:07,141 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:07,141 INFO L216 NwaCegarLoop]: trace histogram [11, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:07,153 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-18 15:41:07,345 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 [2024-09-18 15:41:07,345 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:07,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:07,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1898873598, now seen corresponding path program 21 times [2024-09-18 15:41:07,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:07,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333380966] [2024-09-18 15:41:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:07,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:07,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-18 15:41:07,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:07,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333380966] [2024-09-18 15:41:07,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333380966] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:07,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744743350] [2024-09-18 15:41:07,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:41:07,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:07,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:07,575 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) [2024-09-18 15:41:07,577 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-18 15:41:07,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:41:07,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:07,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-18 15:41:07,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:41:07,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:41:08,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744743350] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:08,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:08,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 35 [2024-09-18 15:41:08,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249173190] [2024-09-18 15:41:08,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:08,083 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-18 15:41:08,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:08,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-18 15:41:08,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 15:41:08,085 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) [2024-09-18 15:41:09,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:09,632 INFO L93 Difference]: Finished difference Result 174 states and 210 transitions. [2024-09-18 15:41:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-09-18 15:41:09,632 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 [2024-09-18 15:41:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:09,633 INFO L225 Difference]: With dead ends: 174 [2024-09-18 15:41:09,633 INFO L226 Difference]: Without dead ends: 162 [2024-09-18 15:41:09,635 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1288, Invalid=6194, Unknown=0, NotChecked=0, Total=7482 [2024-09-18 15:41:09,635 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, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:09,635 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 314 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:41:09,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-18 15:41:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2024-09-18 15:41:09,691 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) [2024-09-18 15:41:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2024-09-18 15:41:09,693 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 33 [2024-09-18 15:41:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:09,694 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2024-09-18 15:41:09,694 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) [2024-09-18 15:41:09,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2024-09-18 15:41:09,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-18 15:41:09,697 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:09,697 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:09,711 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-18 15:41:09,897 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 [2024-09-18 15:41:09,898 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:09,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:09,898 INFO L85 PathProgramCache]: Analyzing trace with hash 158453958, now seen corresponding path program 22 times [2024-09-18 15:41:09,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:09,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518188234] [2024-09-18 15:41:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:10,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 15:41:10,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:10,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518188234] [2024-09-18 15:41:10,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518188234] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:10,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610501089] [2024-09-18 15:41:10,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:41:10,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:10,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:10,200 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) [2024-09-18 15:41:10,201 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-18 15:41:10,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:41:10,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:10,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-18 15:41:10,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 15:41:10,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 15:41:10,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610501089] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:10,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:10,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2024-09-18 15:41:10,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678515131] [2024-09-18 15:41:10,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:10,412 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-18 15:41:10,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-18 15:41:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-18 15:41:10,413 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) [2024-09-18 15:41:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:10,559 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2024-09-18 15:41:10,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-18 15:41:10,559 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 [2024-09-18 15:41:10,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:10,560 INFO L225 Difference]: With dead ends: 157 [2024-09-18 15:41:10,560 INFO L226 Difference]: Without dead ends: 144 [2024-09-18 15:41:10,560 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 16 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:41:10,561 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 [2024-09-18 15:41:10,561 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] [2024-09-18 15:41:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-18 15:41:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2024-09-18 15:41:10,617 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) [2024-09-18 15:41:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2024-09-18 15:41:10,618 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 34 [2024-09-18 15:41:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:10,618 INFO L474 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2024-09-18 15:41:10,618 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) [2024-09-18 15:41:10,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2024-09-18 15:41:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-18 15:41:10,619 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:10,619 INFO L216 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:10,630 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-18 15:41:10,822 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 [2024-09-18 15:41:10,822 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:10,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:10,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1701774746, now seen corresponding path program 23 times [2024-09-18 15:41:10,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:10,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432160034] [2024-09-18 15:41:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:11,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-18 15:41:11,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432160034] [2024-09-18 15:41:11,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432160034] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389221637] [2024-09-18 15:41:11,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:41:11,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:11,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:11,091 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) [2024-09-18 15:41:11,093 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-18 15:41:11,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-18 15:41:11,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:11,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-18 15:41:11,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-18 15:41:11,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-18 15:41:11,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389221637] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:11,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:11,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2024-09-18 15:41:11,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742032937] [2024-09-18 15:41:11,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:11,736 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-18 15:41:11,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:11,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-18 15:41:11,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2024-09-18 15:41:11,737 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) [2024-09-18 15:41:13,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:13,154 INFO L93 Difference]: Finished difference Result 263 states and 301 transitions. [2024-09-18 15:41:13,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-09-18 15:41:13,154 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 [2024-09-18 15:41:13,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:13,155 INFO L225 Difference]: With dead ends: 263 [2024-09-18 15:41:13,155 INFO L226 Difference]: Without dead ends: 239 [2024-09-18 15:41:13,156 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 [2024-09-18 15:41:13,163 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 [2024-09-18 15:41:13,163 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] [2024-09-18 15:41:13,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-18 15:41:13,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 131. [2024-09-18 15:41:13,223 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) [2024-09-18 15:41:13,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2024-09-18 15:41:13,224 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 36 [2024-09-18 15:41:13,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:13,224 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2024-09-18 15:41:13,224 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) [2024-09-18 15:41:13,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:13,224 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2024-09-18 15:41:13,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-18 15:41:13,224 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:13,224 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:13,236 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:13,425 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 [2024-09-18 15:41:13,425 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:13,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1044738881, now seen corresponding path program 24 times [2024-09-18 15:41:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118033160] [2024-09-18 15:41:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:13,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:41:13,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:13,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118033160] [2024-09-18 15:41:13,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118033160] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:13,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352959091] [2024-09-18 15:41:13,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:41:13,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:13,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:13,759 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) [2024-09-18 15:41:13,760 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-18 15:41:13,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-18 15:41:13,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:13,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 15:41:13,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:41:13,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:41:14,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352959091] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:14,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:14,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-18 15:41:14,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781436291] [2024-09-18 15:41:14,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:14,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:41:14,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:41:14,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:41:14,082 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) [2024-09-18 15:41:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:14,308 INFO L93 Difference]: Finished difference Result 206 states and 237 transitions. [2024-09-18 15:41:14,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 15:41:14,308 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 [2024-09-18 15:41:14,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:14,309 INFO L225 Difference]: With dead ends: 206 [2024-09-18 15:41:14,309 INFO L226 Difference]: Without dead ends: 192 [2024-09-18 15:41:14,309 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 20 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-09-18 15:41:14,310 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 [2024-09-18 15:41:14,310 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] [2024-09-18 15:41:14,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-09-18 15:41:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2024-09-18 15:41:14,376 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) [2024-09-18 15:41:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 177 transitions. [2024-09-18 15:41:14,377 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 177 transitions. Word has length 37 [2024-09-18 15:41:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:14,377 INFO L474 AbstractCegarLoop]: Abstraction has 148 states and 177 transitions. [2024-09-18 15:41:14,377 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) [2024-09-18 15:41:14,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 177 transitions. [2024-09-18 15:41:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-18 15:41:14,378 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:14,378 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:14,390 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-18 15:41:14,580 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 [2024-09-18 15:41:14,580 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:14,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:14,581 INFO L85 PathProgramCache]: Analyzing trace with hash -939864138, now seen corresponding path program 25 times [2024-09-18 15:41:14,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:14,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336553474] [2024-09-18 15:41:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:14,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:14,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:41:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336553474] [2024-09-18 15:41:14,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336553474] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:14,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146859870] [2024-09-18 15:41:14,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:41:14,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:14,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:14,867 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) [2024-09-18 15:41:14,868 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-18 15:41:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:14,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-18 15:41:14,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:41:14,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:41:15,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146859870] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:15,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:15,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 40 [2024-09-18 15:41:15,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878070847] [2024-09-18 15:41:15,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:15,403 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-18 15:41:15,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-18 15:41:15,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2024-09-18 15:41:15,404 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) [2024-09-18 15:41:26,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:26,775 INFO L93 Difference]: Finished difference Result 312 states and 375 transitions. [2024-09-18 15:41:26,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2024-09-18 15:41:26,775 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 [2024-09-18 15:41:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:26,776 INFO L225 Difference]: With dead ends: 312 [2024-09-18 15:41:26,780 INFO L226 Difference]: Without dead ends: 260 [2024-09-18 15:41:26,784 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9895 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=4521, Invalid=25235, Unknown=0, NotChecked=0, Total=29756 [2024-09-18 15:41:26,785 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 [2024-09-18 15:41:26,788 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] [2024-09-18 15:41:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-09-18 15:41:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 159. [2024-09-18 15:41:26,888 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) [2024-09-18 15:41:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2024-09-18 15:41:26,889 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 38 [2024-09-18 15:41:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:26,892 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2024-09-18 15:41:26,892 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) [2024-09-18 15:41:26,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:26,892 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2024-09-18 15:41:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-18 15:41:26,893 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:26,893 INFO L216 NwaCegarLoop]: trace histogram [15, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:26,905 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:27,093 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 [2024-09-18 15:41:27,094 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:27,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:27,094 INFO L85 PathProgramCache]: Analyzing trace with hash -981807486, now seen corresponding path program 26 times [2024-09-18 15:41:27,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:27,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157999056] [2024-09-18 15:41:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:27,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:27,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:41:27,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:27,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157999056] [2024-09-18 15:41:27,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157999056] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:27,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549247371] [2024-09-18 15:41:27,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:41:27,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:27,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:27,389 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) [2024-09-18 15:41:27,390 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-18 15:41:27,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:41:27,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:27,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-18 15:41:27,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:41:27,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-18 15:41:27,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549247371] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:27,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:27,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 14] total 42 [2024-09-18 15:41:27,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895793195] [2024-09-18 15:41:27,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:27,897 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-18 15:41:27,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:27,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-18 15:41:27,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2024-09-18 15:41:27,898 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) [2024-09-18 15:41:30,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:30,751 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2024-09-18 15:41:30,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-09-18 15:41:30,751 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 [2024-09-18 15:41:30,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:30,752 INFO L225 Difference]: With dead ends: 249 [2024-09-18 15:41:30,752 INFO L226 Difference]: Without dead ends: 222 [2024-09-18 15:41:30,753 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 [2024-09-18 15:41:30,754 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 [2024-09-18 15:41:30,754 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] [2024-09-18 15:41:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-18 15:41:30,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 186. [2024-09-18 15:41:30,864 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) [2024-09-18 15:41:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2024-09-18 15:41:30,865 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 39 [2024-09-18 15:41:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:30,865 INFO L474 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2024-09-18 15:41:30,865 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) [2024-09-18 15:41:30,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2024-09-18 15:41:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-18 15:41:30,866 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:30,866 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:30,878 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:31,066 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 [2024-09-18 15:41:31,067 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:31,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash -316344474, now seen corresponding path program 27 times [2024-09-18 15:41:31,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:31,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147873950] [2024-09-18 15:41:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:31,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:31,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:41:31,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:31,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147873950] [2024-09-18 15:41:31,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147873950] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:31,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833705032] [2024-09-18 15:41:31,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:41:31,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:31,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:31,322 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) [2024-09-18 15:41:31,333 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-18 15:41:31,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-18 15:41:31,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:31,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-18 15:41:31,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:41:31,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:41:31,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833705032] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:31,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:31,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2024-09-18 15:41:31,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168618946] [2024-09-18 15:41:31,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:31,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 15:41:31,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:31,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 15:41:31,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2024-09-18 15:41:31,689 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) [2024-09-18 15:41:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:31,969 INFO L93 Difference]: Finished difference Result 225 states and 258 transitions. [2024-09-18 15:41:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 15:41:31,969 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 [2024-09-18 15:41:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:31,970 INFO L225 Difference]: With dead ends: 225 [2024-09-18 15:41:31,970 INFO L226 Difference]: Without dead ends: 210 [2024-09-18 15:41:31,971 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 68 SyntacticMatches, 22 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:41:31,971 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 [2024-09-18 15:41:31,971 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] [2024-09-18 15:41:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-09-18 15:41:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2024-09-18 15:41:32,078 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) [2024-09-18 15:41:32,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 225 transitions. [2024-09-18 15:41:32,079 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 225 transitions. Word has length 40 [2024-09-18 15:41:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:32,079 INFO L474 AbstractCegarLoop]: Abstraction has 195 states and 225 transitions. [2024-09-18 15:41:32,080 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) [2024-09-18 15:41:32,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 225 transitions. [2024-09-18 15:41:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-18 15:41:32,085 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:32,085 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:32,100 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-18 15:41:32,285 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 [2024-09-18 15:41:32,285 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:32,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:32,286 INFO L85 PathProgramCache]: Analyzing trace with hash -325611725, now seen corresponding path program 28 times [2024-09-18 15:41:32,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:32,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855935314] [2024-09-18 15:41:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:32,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:32,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:41:32,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:32,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855935314] [2024-09-18 15:41:32,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855935314] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:32,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469491405] [2024-09-18 15:41:32,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:41:32,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:32,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:32,555 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) [2024-09-18 15:41:32,556 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-18 15:41:32,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:41:32,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:32,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-18 15:41:32,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:41:32,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:41:33,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469491405] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:33,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:33,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 44 [2024-09-18 15:41:33,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933563158] [2024-09-18 15:41:33,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:33,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-18 15:41:33,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:33,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-18 15:41:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-18 15:41:33,133 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) [2024-09-18 15:41:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:51,838 INFO L93 Difference]: Finished difference Result 404 states and 469 transitions. [2024-09-18 15:41:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2024-09-18 15:41:51,838 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 [2024-09-18 15:41:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:51,840 INFO L225 Difference]: With dead ends: 404 [2024-09-18 15:41:51,840 INFO L226 Difference]: Without dead ends: 349 [2024-09-18 15:41:51,842 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14929 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=6503, Invalid=36139, Unknown=0, NotChecked=0, Total=42642 [2024-09-18 15:41:51,842 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 852 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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 [2024-09-18 15:41:51,842 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] [2024-09-18 15:41:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-18 15:41:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 209. [2024-09-18 15:41:51,987 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) [2024-09-18 15:41:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 244 transitions. [2024-09-18 15:41:51,988 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 244 transitions. Word has length 41 [2024-09-18 15:41:51,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:51,988 INFO L474 AbstractCegarLoop]: Abstraction has 209 states and 244 transitions. [2024-09-18 15:41:51,988 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) [2024-09-18 15:41:51,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 244 transitions. [2024-09-18 15:41:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-18 15:41:51,989 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:51,990 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:52,001 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:52,190 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 [2024-09-18 15:41:52,190 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:52,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:52,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1065646369, now seen corresponding path program 29 times [2024-09-18 15:41:52,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:52,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024910593] [2024-09-18 15:41:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:52,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:52,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-18 15:41:52,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:52,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024910593] [2024-09-18 15:41:52,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024910593] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:52,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996351515] [2024-09-18 15:41:52,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:41:52,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:52,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:52,463 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) [2024-09-18 15:41:52,464 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-18 15:41:52,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-18 15:41:52,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:52,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-18 15:41:52,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-18 15:41:52,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-18 15:41:52,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996351515] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:52,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:52,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2024-09-18 15:41:52,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243468078] [2024-09-18 15:41:52,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:52,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 15:41:52,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:52,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 15:41:52,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:41:52,830 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) [2024-09-18 15:41:53,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:53,155 INFO L93 Difference]: Finished difference Result 251 states and 292 transitions. [2024-09-18 15:41:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 15:41:53,156 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 [2024-09-18 15:41:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:53,157 INFO L225 Difference]: With dead ends: 251 [2024-09-18 15:41:53,157 INFO L226 Difference]: Without dead ends: 235 [2024-09-18 15:41:53,157 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 22 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2024-09-18 15:41:53,160 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 [2024-09-18 15:41:53,160 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] [2024-09-18 15:41:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-18 15:41:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 220. [2024-09-18 15:41:53,341 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) [2024-09-18 15:41:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 258 transitions. [2024-09-18 15:41:53,342 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 258 transitions. Word has length 43 [2024-09-18 15:41:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:53,342 INFO L474 AbstractCegarLoop]: Abstraction has 220 states and 258 transitions. [2024-09-18 15:41:53,342 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) [2024-09-18 15:41:53,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 258 transitions. [2024-09-18 15:41:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-18 15:41:53,342 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:53,342 INFO L216 NwaCegarLoop]: trace histogram [16, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:53,354 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-18 15:41:53,543 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 [2024-09-18 15:41:53,543 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:53,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:53,543 INFO L85 PathProgramCache]: Analyzing trace with hash -133663071, now seen corresponding path program 30 times [2024-09-18 15:41:53,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:53,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799987925] [2024-09-18 15:41:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:53,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:53,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:41:53,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:53,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799987925] [2024-09-18 15:41:53,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799987925] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:53,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158446496] [2024-09-18 15:41:53,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:41:53,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:53,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:53,846 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) [2024-09-18 15:41:53,847 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-18 15:41:53,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-18 15:41:53,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:41:53,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-18 15:41:53,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:41:54,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-09-18 15:41:54,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158446496] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:54,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:54,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 16] total 47 [2024-09-18 15:41:54,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38128293] [2024-09-18 15:41:54,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:54,527 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-18 15:41:54,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-18 15:41:54,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2024-09-18 15:41:54,528 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) [2024-09-18 15:41:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:41:57,806 INFO L93 Difference]: Finished difference Result 284 states and 339 transitions. [2024-09-18 15:41:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-18 15:41:57,807 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 [2024-09-18 15:41:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:41:57,808 INFO L225 Difference]: With dead ends: 284 [2024-09-18 15:41:57,808 INFO L226 Difference]: Without dead ends: 240 [2024-09-18 15:41:57,809 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3156 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1183, Invalid=12389, Unknown=0, NotChecked=0, Total=13572 [2024-09-18 15:41:57,810 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-18 15:41:57,810 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 556 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-18 15:41:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-09-18 15:41:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2024-09-18 15:41:57,949 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) [2024-09-18 15:41:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 258 transitions. [2024-09-18 15:41:57,950 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 258 transitions. Word has length 43 [2024-09-18 15:41:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:41:57,950 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 258 transitions. [2024-09-18 15:41:57,950 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) [2024-09-18 15:41:57,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 258 transitions. [2024-09-18 15:41:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-18 15:41:57,951 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:41:57,951 INFO L216 NwaCegarLoop]: trace histogram [17, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:41:57,963 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-18 15:41:58,151 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 [2024-09-18 15:41:58,152 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:41:58,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:41:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1260222622, now seen corresponding path program 31 times [2024-09-18 15:41:58,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:41:58,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583791008] [2024-09-18 15:41:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:41:58,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:41:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:58,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:41:58,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-18 15:41:58,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:41:58,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583791008] [2024-09-18 15:41:58,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583791008] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:41:58,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370037188] [2024-09-18 15:41:58,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:41:58,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:41:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:41:58,601 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) [2024-09-18 15:41:58,602 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-18 15:41:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:41:58,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-18 15:41:58,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:41:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:41:58,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:41:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-18 15:41:59,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370037188] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:41:59,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:41:59,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 16] total 49 [2024-09-18 15:41:59,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83502335] [2024-09-18 15:41:59,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:41:59,123 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-18 15:41:59,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:41:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-18 15:41:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1886, Unknown=0, NotChecked=0, Total=2352 [2024-09-18 15:41:59,124 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) [2024-09-18 15:42:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:42:00,989 INFO L93 Difference]: Finished difference Result 409 states and 484 transitions. [2024-09-18 15:42:00,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-09-18 15:42:00,989 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 [2024-09-18 15:42:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:42:00,991 INFO L225 Difference]: With dead ends: 409 [2024-09-18 15:42:00,991 INFO L226 Difference]: Without dead ends: 395 [2024-09-18 15:42:00,991 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2360, Invalid=7342, Unknown=0, NotChecked=0, Total=9702 [2024-09-18 15:42:00,992 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, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:42:00,992 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 542 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:42:00,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-09-18 15:42:01,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 223. [2024-09-18 15:42:01,132 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) [2024-09-18 15:42:01,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2024-09-18 15:42:01,133 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 43 [2024-09-18 15:42:01,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:42:01,133 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2024-09-18 15:42:01,133 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) [2024-09-18 15:42:01,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:01,134 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2024-09-18 15:42:01,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-18 15:42:01,134 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:42:01,134 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:42:01,146 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-18 15:42:01,338 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 [2024-09-18 15:42:01,338 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:42:01,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:01,339 INFO L85 PathProgramCache]: Analyzing trace with hash -535534058, now seen corresponding path program 32 times [2024-09-18 15:42:01,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:42:01,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753209488] [2024-09-18 15:42:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:42:01,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:42:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:01,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:42:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-18 15:42:01,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:42:01,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753209488] [2024-09-18 15:42:01,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753209488] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:42:01,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179851297] [2024-09-18 15:42:01,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:42:01,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:42:01,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:42:01,650 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) [2024-09-18 15:42:01,650 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-18 15:42:01,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:42:01,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:42:01,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-18 15:42:01,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:42:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-18 15:42:01,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:42:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-18 15:42:02,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179851297] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:42:02,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:42:02,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 48 [2024-09-18 15:42:02,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229151997] [2024-09-18 15:42:02,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:42:02,398 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-18 15:42:02,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:42:02,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-18 15:42:02,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2024-09-18 15:42:02,399 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) [2024-09-18 15:42:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:42:32,011 INFO L93 Difference]: Finished difference Result 463 states and 527 transitions. [2024-09-18 15:42:32,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2024-09-18 15:42:32,011 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 [2024-09-18 15:42:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:42:32,013 INFO L225 Difference]: With dead ends: 463 [2024-09-18 15:42:32,013 INFO L226 Difference]: Without dead ends: 399 [2024-09-18 15:42:32,015 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21643 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=9078, Invalid=50214, Unknown=0, NotChecked=0, Total=59292 [2024-09-18 15:42:32,015 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, 1.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:42:32,015 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 299 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-18 15:42:32,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-09-18 15:42:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 238. [2024-09-18 15:42:32,177 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) [2024-09-18 15:42:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 274 transitions. [2024-09-18 15:42:32,178 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 274 transitions. Word has length 44 [2024-09-18 15:42:32,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:42:32,178 INFO L474 AbstractCegarLoop]: Abstraction has 238 states and 274 transitions. [2024-09-18 15:42:32,178 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) [2024-09-18 15:42:32,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 274 transitions. [2024-09-18 15:42:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 15:42:32,179 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:42:32,179 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:42:32,192 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-18 15:42:32,379 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 [2024-09-18 15:42:32,380 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:42:32,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:32,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1831492090, now seen corresponding path program 33 times [2024-09-18 15:42:32,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:42:32,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644431519] [2024-09-18 15:42:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:42:32,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:42:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:32,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:42:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:42:32,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:42:32,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644431519] [2024-09-18 15:42:32,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644431519] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:42:32,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435582909] [2024-09-18 15:42:32,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:42:32,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:42:32,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:42:32,701 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) [2024-09-18 15:42:32,704 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-18 15:42:32,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-18 15:42:32,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:42:32,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-18 15:42:32,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:42:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:42:32,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:42:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:42:33,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435582909] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:42:33,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:42:33,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2024-09-18 15:42:33,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142589761] [2024-09-18 15:42:33,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:42:33,073 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-18 15:42:33,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:42:33,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-18 15:42:33,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2024-09-18 15:42:33,074 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) [2024-09-18 15:42:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:42:33,408 INFO L93 Difference]: Finished difference Result 280 states and 321 transitions. [2024-09-18 15:42:33,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 15:42:33,408 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 [2024-09-18 15:42:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:42:33,409 INFO L225 Difference]: With dead ends: 280 [2024-09-18 15:42:33,409 INFO L226 Difference]: Without dead ends: 263 [2024-09-18 15:42:33,409 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 78 SyntacticMatches, 26 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:42:33,410 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:42:33,410 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 299 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:42:33,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-09-18 15:42:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 249. [2024-09-18 15:42:33,577 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) [2024-09-18 15:42:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2024-09-18 15:42:33,578 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 46 [2024-09-18 15:42:33,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:42:33,578 INFO L474 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2024-09-18 15:42:33,579 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) [2024-09-18 15:42:33,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2024-09-18 15:42:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-18 15:42:33,579 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:42:33,579 INFO L216 NwaCegarLoop]: trace histogram [18, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:42:33,591 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-18 15:42:33,783 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 [2024-09-18 15:42:33,783 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:42:33,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:33,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1201296938, now seen corresponding path program 34 times [2024-09-18 15:42:33,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:42:33,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391320249] [2024-09-18 15:42:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:42:33,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:42:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:34,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:42:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:42:34,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:42:34,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391320249] [2024-09-18 15:42:34,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391320249] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:42:34,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16410429] [2024-09-18 15:42:34,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:42:34,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:42:34,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:42:34,175 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) [2024-09-18 15:42:34,176 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-18 15:42:34,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:42:34,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:42:34,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-18 15:42:34,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:42:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:42:34,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:42:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-18 15:42:34,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16410429] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:42:34,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:42:34,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 18] total 53 [2024-09-18 15:42:34,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332764310] [2024-09-18 15:42:34,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:42:34,922 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-18 15:42:34,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:42:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-18 15:42:34,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2024-09-18 15:42:34,923 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) [2024-09-18 15:42:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:42:40,288 INFO L93 Difference]: Finished difference Result 319 states and 376 transitions. [2024-09-18 15:42:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-09-18 15:42:40,289 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 [2024-09-18 15:42:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:42:40,290 INFO L225 Difference]: With dead ends: 319 [2024-09-18 15:42:40,290 INFO L226 Difference]: Without dead ends: 279 [2024-09-18 15:42:40,291 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5249 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1655, Invalid=19225, Unknown=0, NotChecked=0, Total=20880 [2024-09-18 15:42:40,291 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2024-09-18 15:42:40,291 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 618 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2839 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-18 15:42:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-09-18 15:42:40,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 261. [2024-09-18 15:42:40,474 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) [2024-09-18 15:42:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 295 transitions. [2024-09-18 15:42:40,475 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 295 transitions. Word has length 46 [2024-09-18 15:42:40,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:42:40,475 INFO L474 AbstractCegarLoop]: Abstraction has 261 states and 295 transitions. [2024-09-18 15:42:40,475 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) [2024-09-18 15:42:40,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:40,476 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 295 transitions. [2024-09-18 15:42:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-18 15:42:40,476 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:42:40,476 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:42:40,501 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-18 15:42:40,677 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 [2024-09-18 15:42:40,677 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:42:40,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:40,677 INFO L85 PathProgramCache]: Analyzing trace with hash 981523539, now seen corresponding path program 35 times [2024-09-18 15:42:40,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:42:40,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541113411] [2024-09-18 15:42:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:42:40,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:42:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:40,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:42:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:42:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:42:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541113411] [2024-09-18 15:42:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541113411] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:42:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137942747] [2024-09-18 15:42:40,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:42:40,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:42:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:42:40,999 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) [2024-09-18 15:42:41,000 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-18 15:42:41,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-18 15:42:41,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:42:41,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-18 15:42:41,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:42:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:42:41,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:42:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-18 15:42:42,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137942747] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:42:42,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:42:42,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 62 [2024-09-18 15:42:42,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555084035] [2024-09-18 15:42:42,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:42:42,541 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-18 15:42:42,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:42:42,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-18 15:42:42,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-18 15:42:42,542 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) [2024-09-18 15:42:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:42:48,288 INFO L93 Difference]: Finished difference Result 549 states and 622 transitions. [2024-09-18 15:42:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-09-18 15:42:48,288 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 [2024-09-18 15:42:48,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:42:48,290 INFO L225 Difference]: With dead ends: 549 [2024-09-18 15:42:48,294 INFO L226 Difference]: Without dead ends: 518 [2024-09-18 15:42:48,295 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 [2024-09-18 15:42:48,296 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, 0.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:42:48,296 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 353 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-18 15:42:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-09-18 15:42:48,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 296. [2024-09-18 15:42:48,539 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) [2024-09-18 15:42:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 337 transitions. [2024-09-18 15:42:48,540 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 337 transitions. Word has length 47 [2024-09-18 15:42:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:42:48,541 INFO L474 AbstractCegarLoop]: Abstraction has 296 states and 337 transitions. [2024-09-18 15:42:48,542 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) [2024-09-18 15:42:48,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 337 transitions. [2024-09-18 15:42:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-18 15:42:48,546 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:42:48,546 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:42:48,570 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-18 15:42:48,747 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 [2024-09-18 15:42:48,747 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:42:48,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:48,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1882278143, now seen corresponding path program 36 times [2024-09-18 15:42:48,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:42:48,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360460820] [2024-09-18 15:42:48,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:42:48,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:42:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:49,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:42:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-18 15:42:49,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:42:49,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360460820] [2024-09-18 15:42:49,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360460820] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:42:49,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108767283] [2024-09-18 15:42:49,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:42:49,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:42:49,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:42:49,326 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) [2024-09-18 15:42:49,327 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-18 15:42:49,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-18 15:42:49,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:42:49,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-18 15:42:49,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:42:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-18 15:42:49,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:42:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-18 15:42:49,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108767283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:42:49,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:42:49,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2024-09-18 15:42:49,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056662289] [2024-09-18 15:42:49,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:42:49,894 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 15:42:49,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:42:49,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 15:42:49,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:42:49,895 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) [2024-09-18 15:42:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:42:50,496 INFO L93 Difference]: Finished difference Result 469 states and 535 transitions. [2024-09-18 15:42:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-18 15:42:50,496 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 [2024-09-18 15:42:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:42:50,498 INFO L225 Difference]: With dead ends: 469 [2024-09-18 15:42:50,498 INFO L226 Difference]: Without dead ends: 451 [2024-09-18 15:42:50,498 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 28 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:42:50,499 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-18 15:42:50,499 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] [2024-09-18 15:42:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-09-18 15:42:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 332. [2024-09-18 15:42:50,864 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) [2024-09-18 15:42:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 383 transitions. [2024-09-18 15:42:50,866 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 383 transitions. Word has length 49 [2024-09-18 15:42:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:42:50,869 INFO L474 AbstractCegarLoop]: Abstraction has 332 states and 383 transitions. [2024-09-18 15:42:50,869 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) [2024-09-18 15:42:50,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 383 transitions. [2024-09-18 15:42:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-18 15:42:50,870 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:42:50,870 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:42:50,885 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-09-18 15:42:51,070 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 [2024-09-18 15:42:51,071 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:42:51,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:42:51,074 INFO L85 PathProgramCache]: Analyzing trace with hash 202552438, now seen corresponding path program 37 times [2024-09-18 15:42:51,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:42:51,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240968238] [2024-09-18 15:42:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:42:51,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:42:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:51,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:42:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-18 15:42:51,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:42:51,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240968238] [2024-09-18 15:42:51,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240968238] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:42:51,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275216326] [2024-09-18 15:42:51,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:42:51,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:42:51,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:42:51,462 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) [2024-09-18 15:42:51,463 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-18 15:42:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:42:51,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-18 15:42:51,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:42:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-18 15:42:51,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:42:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-18 15:42:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275216326] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:42:52,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:42:52,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 56 [2024-09-18 15:42:52,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047918533] [2024-09-18 15:42:52,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:42:52,450 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-18 15:42:52,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:42:52,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-18 15:42:52,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2631, Unknown=0, NotChecked=0, Total=3080 [2024-09-18 15:42:52,451 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) [2024-09-18 15:44:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:44:02,618 INFO L93 Difference]: Finished difference Result 693 states and 810 transitions. [2024-09-18 15:44:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2024-09-18 15:44:02,619 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 [2024-09-18 15:44:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:44:02,620 INFO L225 Difference]: With dead ends: 693 [2024-09-18 15:44:02,621 INFO L226 Difference]: Without dead ends: 586 [2024-09-18 15:44:02,624 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41658 ImplicationChecksByTransitivity, 68.4s TimeCoverageRelationStatistics Valid=16448, Invalid=90154, Unknown=0, NotChecked=0, Total=106602 [2024-09-18 15:44:02,625 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, 2.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:44:02,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 335 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-18 15:44:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2024-09-18 15:44:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 339. [2024-09-18 15:44:02,932 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) [2024-09-18 15:44:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 391 transitions. [2024-09-18 15:44:02,934 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 391 transitions. Word has length 50 [2024-09-18 15:44:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:44:02,934 INFO L474 AbstractCegarLoop]: Abstraction has 339 states and 391 transitions. [2024-09-18 15:44:02,935 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) [2024-09-18 15:44:02,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 391 transitions. [2024-09-18 15:44:02,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-18 15:44:02,935 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:44:02,936 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:44:02,948 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-18 15:44:03,136 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 [2024-09-18 15:44:03,136 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:44:03,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:03,137 INFO L85 PathProgramCache]: Analyzing trace with hash -436609882, now seen corresponding path program 38 times [2024-09-18 15:44:03,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:44:03,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257930136] [2024-09-18 15:44:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:44:03,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:44:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:03,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:44:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-18 15:44:03,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:44:03,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257930136] [2024-09-18 15:44:03,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257930136] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:44:03,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776936759] [2024-09-18 15:44:03,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:44:03,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:44:03,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:44:03,532 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) [2024-09-18 15:44:03,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-18 15:44:03,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:44:03,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:44:03,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-18 15:44:03,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:44:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-18 15:44:03,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:44:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-18 15:44:03,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776936759] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:44:03,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:44:03,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2024-09-18 15:44:03,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341485713] [2024-09-18 15:44:03,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:44:03,973 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-18 15:44:03,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:44:03,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-18 15:44:03,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:44:03,974 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) [2024-09-18 15:44:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:44:04,630 INFO L93 Difference]: Finished difference Result 424 states and 490 transitions. [2024-09-18 15:44:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:44:04,630 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 [2024-09-18 15:44:04,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:44:04,632 INFO L225 Difference]: With dead ends: 424 [2024-09-18 15:44:04,632 INFO L226 Difference]: Without dead ends: 405 [2024-09-18 15:44:04,632 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 30 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:44:04,633 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 [2024-09-18 15:44:04,633 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] [2024-09-18 15:44:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-09-18 15:44:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 351. [2024-09-18 15:44:04,993 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) [2024-09-18 15:44:04,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 406 transitions. [2024-09-18 15:44:04,994 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 406 transitions. Word has length 52 [2024-09-18 15:44:04,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:44:04,995 INFO L474 AbstractCegarLoop]: Abstraction has 351 states and 406 transitions. [2024-09-18 15:44:04,995 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) [2024-09-18 15:44:04,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:04,995 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 406 transitions. [2024-09-18 15:44:04,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-18 15:44:04,996 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:44:04,996 INFO L216 NwaCegarLoop]: trace histogram [22, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:44:05,011 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-09-18 15:44:05,196 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 [2024-09-18 15:44:05,197 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:44:05,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:05,197 INFO L85 PathProgramCache]: Analyzing trace with hash -428518713, now seen corresponding path program 39 times [2024-09-18 15:44:05,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:44:05,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121507198] [2024-09-18 15:44:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:44:05,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:44:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:05,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:44:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:44:05,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:44:05,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121507198] [2024-09-18 15:44:05,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121507198] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:44:05,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753453532] [2024-09-18 15:44:05,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:44:05,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:44:05,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:44:05,738 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) [2024-09-18 15:44:05,765 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-18 15:44:05,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-18 15:44:05,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:44:05,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-18 15:44:05,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:44:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-18 15:44:06,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:44:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-18 15:44:07,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753453532] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:44:07,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:44:07,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 20, 20] total 61 [2024-09-18 15:44:07,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024704111] [2024-09-18 15:44:07,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:44:07,208 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-18 15:44:07,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:44:07,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-18 15:44:07,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3416, Unknown=0, NotChecked=0, Total=3660 [2024-09-18 15:44:07,209 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) [2024-09-18 15:44:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:44:19,900 INFO L93 Difference]: Finished difference Result 501 states and 611 transitions. [2024-09-18 15:44:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2024-09-18 15:44:19,901 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 [2024-09-18 15:44:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:44:19,902 INFO L225 Difference]: With dead ends: 501 [2024-09-18 15:44:19,903 INFO L226 Difference]: Without dead ends: 425 [2024-09-18 15:44:19,904 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16165 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3240, Invalid=54120, Unknown=0, NotChecked=0, Total=57360 [2024-09-18 15:44:19,905 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 221 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 6824 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:44:19,905 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 854 Invalid, 7011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 6824 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-18 15:44:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-09-18 15:44:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 370. [2024-09-18 15:44:20,307 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) [2024-09-18 15:44:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 421 transitions. [2024-09-18 15:44:20,308 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 421 transitions. Word has length 52 [2024-09-18 15:44:20,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:44:20,308 INFO L474 AbstractCegarLoop]: Abstraction has 370 states and 421 transitions. [2024-09-18 15:44:20,308 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) [2024-09-18 15:44:20,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 421 transitions. [2024-09-18 15:44:20,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-18 15:44:20,309 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:44:20,310 INFO L216 NwaCegarLoop]: trace histogram [23, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:44:20,323 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-18 15:44:20,513 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 [2024-09-18 15:44:20,514 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:44:20,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1732839874, now seen corresponding path program 40 times [2024-09-18 15:44:20,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:44:20,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611831471] [2024-09-18 15:44:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:44:20,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:44:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:21,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:44:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 15:44:21,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:44:21,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611831471] [2024-09-18 15:44:21,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611831471] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:44:21,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350526073] [2024-09-18 15:44:21,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:44:21,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:44:21,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:44:21,106 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) [2024-09-18 15:44:21,110 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-18 15:44:21,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:44:21,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:44:21,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-18 15:44:21,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:44:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:44:21,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:44:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-18 15:44:22,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350526073] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:44:22,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:44:22,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 20] total 63 [2024-09-18 15:44:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019047389] [2024-09-18 15:44:22,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:44:22,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-18 15:44:22,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:44:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-18 15:44:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=3162, Unknown=0, NotChecked=0, Total=3906 [2024-09-18 15:44:22,189 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) [2024-09-18 15:44:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:44:26,769 INFO L93 Difference]: Finished difference Result 720 states and 838 transitions. [2024-09-18 15:44:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2024-09-18 15:44:26,770 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 [2024-09-18 15:44:26,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:44:26,774 INFO L225 Difference]: With dead ends: 720 [2024-09-18 15:44:26,774 INFO L226 Difference]: Without dead ends: 702 [2024-09-18 15:44:26,775 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5119, Invalid=15761, Unknown=0, NotChecked=0, Total=20880 [2024-09-18 15:44:26,775 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 576 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 3198 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:44:26,776 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 787 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 3198 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-18 15:44:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2024-09-18 15:44:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 376. [2024-09-18 15:44:27,154 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) [2024-09-18 15:44:27,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 424 transitions. [2024-09-18 15:44:27,158 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 424 transitions. Word has length 53 [2024-09-18 15:44:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:44:27,158 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 424 transitions. [2024-09-18 15:44:27,158 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) [2024-09-18 15:44:27,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:27,158 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 424 transitions. [2024-09-18 15:44:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-18 15:44:27,159 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:44:27,159 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:44:27,171 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-09-18 15:44:27,360 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 [2024-09-18 15:44:27,360 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:44:27,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1452158177, now seen corresponding path program 41 times [2024-09-18 15:44:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:44:27,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514441682] [2024-09-18 15:44:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:44:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:44:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:27,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:44:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-18 15:44:27,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:44:27,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514441682] [2024-09-18 15:44:27,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514441682] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:44:27,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818038390] [2024-09-18 15:44:27,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:44:27,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:44:27,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:44:27,831 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) [2024-09-18 15:44:27,834 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-18 15:44:28,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-18 15:44:28,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:44:28,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-18 15:44:28,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:44:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-18 15:44:28,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:44:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-18 15:44:28,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818038390] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:44:28,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:44:28,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2024-09-18 15:44:28,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873165268] [2024-09-18 15:44:28,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:44:28,945 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:44:28,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:44:28,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:44:28,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:44:28,946 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) [2024-09-18 15:44:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:44:29,697 INFO L93 Difference]: Finished difference Result 459 states and 516 transitions. [2024-09-18 15:44:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-18 15:44:29,697 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 [2024-09-18 15:44:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:44:29,699 INFO L225 Difference]: With dead ends: 459 [2024-09-18 15:44:29,699 INFO L226 Difference]: Without dead ends: 439 [2024-09-18 15:44:29,699 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 93 SyntacticMatches, 32 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:44:29,699 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 [2024-09-18 15:44:29,699 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] [2024-09-18 15:44:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-09-18 15:44:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 388. [2024-09-18 15:44:30,033 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) [2024-09-18 15:44:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 438 transitions. [2024-09-18 15:44:30,034 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 438 transitions. Word has length 55 [2024-09-18 15:44:30,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:44:30,035 INFO L474 AbstractCegarLoop]: Abstraction has 388 states and 438 transitions. [2024-09-18 15:44:30,035 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) [2024-09-18 15:44:30,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:30,035 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 438 transitions. [2024-09-18 15:44:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-18 15:44:30,036 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:44:30,036 INFO L216 NwaCegarLoop]: trace histogram [24, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:44:30,048 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-09-18 15:44:30,238 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 [2024-09-18 15:44:30,238 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:44:30,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:30,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1240281910, now seen corresponding path program 42 times [2024-09-18 15:44:30,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:44:30,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110138644] [2024-09-18 15:44:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:44:30,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:44:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:30,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:44:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-18 15:44:30,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:44:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110138644] [2024-09-18 15:44:30,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110138644] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:44:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102686161] [2024-09-18 15:44:30,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:44:30,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:44:30,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:44:30,831 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) [2024-09-18 15:44:30,831 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-18 15:44:31,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-18 15:44:31,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:44:31,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-18 15:44:31,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:44:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-09-18 15:44:31,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:44:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-09-18 15:44:32,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102686161] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:44:32,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:44:32,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 22, 22] total 67 [2024-09-18 15:44:32,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170312957] [2024-09-18 15:44:32,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:44:32,639 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-18 15:44:32,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:44:32,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-18 15:44:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4142, Unknown=0, NotChecked=0, Total=4422 [2024-09-18 15:44:32,640 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) [2024-09-18 15:44:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:44:51,643 INFO L93 Difference]: Finished difference Result 522 states and 625 transitions. [2024-09-18 15:44:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2024-09-18 15:44:51,643 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 56 [2024-09-18 15:44:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:44:51,645 INFO L225 Difference]: With dead ends: 522 [2024-09-18 15:44:51,645 INFO L226 Difference]: Without dead ends: 438 [2024-09-18 15:44:51,649 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28731 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=4553, Invalid=88777, Unknown=0, NotChecked=0, Total=93330 [2024-09-18 15:44:51,650 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 290 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 9145 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 9346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 9145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:44:51,650 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1085 Invalid, 9346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 9145 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-18 15:44:51,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-09-18 15:44:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 414. [2024-09-18 15:44:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 409 states have (on average 1.117359413202934) internal successors, (457), 409 states have internal predecessors, (457), 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) [2024-09-18 15:44:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 461 transitions. [2024-09-18 15:44:52,046 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 461 transitions. Word has length 56 [2024-09-18 15:44:52,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:44:52,046 INFO L474 AbstractCegarLoop]: Abstraction has 414 states and 461 transitions. [2024-09-18 15:44:52,046 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-09-18 15:44:52,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 461 transitions. [2024-09-18 15:44:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-18 15:44:52,048 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:44:52,048 INFO L216 NwaCegarLoop]: trace histogram [25, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:44:52,060 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-09-18 15:44:52,248 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-18 15:44:52,248 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:44:52,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:44:52,249 INFO L85 PathProgramCache]: Analyzing trace with hash -824573133, now seen corresponding path program 43 times [2024-09-18 15:44:52,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:44:52,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477329603] [2024-09-18 15:44:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:44:52,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:44:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:52,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:44:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-18 15:44:52,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:44:52,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477329603] [2024-09-18 15:44:52,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477329603] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:44:52,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072249830] [2024-09-18 15:44:52,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:44:52,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:44:52,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:44:52,944 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:44:52,949 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-18 15:44:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:44:53,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-09-18 15:44:53,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:44:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:44:53,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:44:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-09-18 15:44:54,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072249830] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:44:54,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:44:54,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 22] total 69 [2024-09-18 15:44:54,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084577494] [2024-09-18 15:44:54,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:44:54,041 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-18 15:44:54,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:44:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-18 15:44:54,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=3807, Unknown=0, NotChecked=0, Total=4692 [2024-09-18 15:44:54,042 INFO L87 Difference]: Start difference. First operand 414 states and 461 transitions. Second operand has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 69 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:00,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:00,353 INFO L93 Difference]: Finished difference Result 890 states and 1028 transitions. [2024-09-18 15:45:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2024-09-18 15:45:00,354 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 69 states have internal predecessors, (92), 2 states have call successors, (3), 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 57 [2024-09-18 15:45:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:00,356 INFO L225 Difference]: With dead ends: 890 [2024-09-18 15:45:00,357 INFO L226 Difference]: Without dead ends: 872 [2024-09-18 15:45:00,358 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9442 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7099, Invalid=21631, Unknown=0, NotChecked=0, Total=28730 [2024-09-18 15:45:00,358 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 1015 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 4955 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 5239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 4955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:00,358 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1151 Invalid, 5239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 4955 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-18 15:45:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2024-09-18 15:45:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 418. [2024-09-18 15:45:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 1.1089588377723971) internal successors, (458), 413 states have internal predecessors, (458), 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) [2024-09-18 15:45:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 462 transitions. [2024-09-18 15:45:00,757 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 462 transitions. Word has length 57 [2024-09-18 15:45:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:00,757 INFO L474 AbstractCegarLoop]: Abstraction has 418 states and 462 transitions. [2024-09-18 15:45:00,757 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 69 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:00,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 462 transitions. [2024-09-18 15:45:00,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-18 15:45:00,758 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:00,758 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:00,770 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-09-18 15:45:00,962 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:00,963 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:00,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:00,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2071487674, now seen corresponding path program 44 times [2024-09-18 15:45:00,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:00,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375827755] [2024-09-18 15:45:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:00,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:01,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-18 15:45:01,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:01,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375827755] [2024-09-18 15:45:01,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375827755] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:01,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753600791] [2024-09-18 15:45:01,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:45:01,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:01,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:01,379 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:45:01,380 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-18 15:45:01,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:45:01,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:01,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-09-18 15:45:01,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-18 15:45:01,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-18 15:45:01,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753600791] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:01,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:01,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2024-09-18 15:45:01,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439377759] [2024-09-18 15:45:01,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:01,857 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-18 15:45:01,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:01,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-18 15:45:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:45:01,857 INFO L87 Difference]: Start difference. First operand 418 states and 462 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 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) [2024-09-18 15:45:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:02,911 INFO L93 Difference]: Finished difference Result 532 states and 584 transitions. [2024-09-18 15:45:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-18 15:45:02,911 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 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 58 [2024-09-18 15:45:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:02,913 INFO L225 Difference]: With dead ends: 532 [2024-09-18 15:45:02,913 INFO L226 Difference]: Without dead ends: 511 [2024-09-18 15:45:02,914 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 98 SyntacticMatches, 34 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2024-09-18 15:45:02,914 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:02,914 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 473 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:45:02,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-09-18 15:45:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 432. [2024-09-18 15:45:03,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 427 states have (on average 1.1100702576112411) internal successors, (474), 427 states have internal predecessors, (474), 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) [2024-09-18 15:45:03,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 478 transitions. [2024-09-18 15:45:03,323 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 478 transitions. Word has length 58 [2024-09-18 15:45:03,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:03,323 INFO L474 AbstractCegarLoop]: Abstraction has 432 states and 478 transitions. [2024-09-18 15:45:03,323 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 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) [2024-09-18 15:45:03,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 478 transitions. [2024-09-18 15:45:03,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-18 15:45:03,324 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:03,325 INFO L216 NwaCegarLoop]: trace histogram [20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:03,337 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-09-18 15:45:03,528 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-18 15:45:03,529 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:03,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1584056173, now seen corresponding path program 45 times [2024-09-18 15:45:03,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:03,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382192438] [2024-09-18 15:45:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:03,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:03,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-18 15:45:03,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:03,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382192438] [2024-09-18 15:45:03,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382192438] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:03,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086068346] [2024-09-18 15:45:03,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:45:03,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:03,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:03,975 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:45:03,976 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-18 15:45:04,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-09-18 15:45:04,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:04,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-18 15:45:04,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-18 15:45:04,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-18 15:45:05,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086068346] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:05,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:05,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 72 [2024-09-18 15:45:05,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317023383] [2024-09-18 15:45:05,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:05,837 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-18 15:45:05,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:05,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-18 15:45:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=4355, Unknown=0, NotChecked=0, Total=5112 [2024-09-18 15:45:05,838 INFO L87 Difference]: Start difference. First operand 432 states and 478 transitions. Second operand has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:16,716 INFO L93 Difference]: Finished difference Result 739 states and 813 transitions. [2024-09-18 15:45:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2024-09-18 15:45:16,717 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 2 states have call successors, (3), 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 59 [2024-09-18 15:45:16,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:16,719 INFO L225 Difference]: With dead ends: 739 [2024-09-18 15:45:16,719 INFO L226 Difference]: Without dead ends: 698 [2024-09-18 15:45:16,721 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7464 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=5216, Invalid=21190, Unknown=0, NotChecked=0, Total=26406 [2024-09-18 15:45:16,724 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 624 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:16,724 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 390 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-18 15:45:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2024-09-18 15:45:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 453. [2024-09-18 15:45:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 448 states have (on average 1.1205357142857142) internal successors, (502), 448 states have internal predecessors, (502), 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) [2024-09-18 15:45:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 506 transitions. [2024-09-18 15:45:17,242 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 506 transitions. Word has length 59 [2024-09-18 15:45:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:17,242 INFO L474 AbstractCegarLoop]: Abstraction has 453 states and 506 transitions. [2024-09-18 15:45:17,242 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:17,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 506 transitions. [2024-09-18 15:45:17,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-18 15:45:17,244 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:17,244 INFO L216 NwaCegarLoop]: trace histogram [26, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:17,257 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-09-18 15:45:17,444 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:17,445 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:17,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:17,445 INFO L85 PathProgramCache]: Analyzing trace with hash -213028330, now seen corresponding path program 46 times [2024-09-18 15:45:17,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:17,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928348206] [2024-09-18 15:45:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:17,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:18,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-18 15:45:18,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:18,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928348206] [2024-09-18 15:45:18,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928348206] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:18,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804526408] [2024-09-18 15:45:18,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:45:18,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:18,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:18,128 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:45:18,129 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-18 15:45:18,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:45:18,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:18,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-09-18 15:45:18,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:45:18,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-09-18 15:45:19,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804526408] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:19,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:19,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 24] total 74 [2024-09-18 15:45:19,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524617533] [2024-09-18 15:45:19,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:19,364 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-18 15:45:19,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-18 15:45:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=4388, Unknown=0, NotChecked=0, Total=5402 [2024-09-18 15:45:19,365 INFO L87 Difference]: Start difference. First operand 453 states and 506 transitions. Second operand has 74 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 74 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)