./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de51.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 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-de51.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 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 22:07:41,232 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 22:07:41,299 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 22:07:41,303 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 22:07:41,304 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 22:07:41,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 22:07:41,333 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 22:07:41,335 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 22:07:41,336 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 22:07:41,337 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 22:07:41,337 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 22:07:41,338 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 22:07:41,338 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 22:07:41,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 22:07:41,339 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 22:07:41,339 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 22:07:41,339 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 22:07:41,340 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 22:07:41,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 22:07:41,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 22:07:41,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 22:07:41,345 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 22:07:41,346 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 22:07:41,346 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 22:07:41,346 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 22:07:41,346 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 22:07:41,347 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 22:07:41,347 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 22:07:41,347 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 22:07:41,347 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 22:07:41,347 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 22:07:41,348 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 22:07:41,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:07:41,348 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 22:07:41,348 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 22:07:41,349 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 22:07:41,349 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 22:07:41,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 22:07:41,351 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 22:07:41,352 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 22:07:41,352 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 22:07:41,353 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 22:07:41,353 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 22:07:41,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 22:07:41,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 22:07:41,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 22:07:41,625 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 22:07:41,626 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 22:07:41,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de51.c [2024-09-12 22:07:43,007 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 22:07:43,182 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 22:07:43,182 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de51.c [2024-09-12 22:07:43,188 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e5a205657/1dfa4a3efd5f4e9cbfcb79fd77645cdd/FLAG5a2ab8266 [2024-09-12 22:07:43,200 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e5a205657/1dfa4a3efd5f4e9cbfcb79fd77645cdd [2024-09-12 22:07:43,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 22:07:43,204 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 22:07:43,207 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 22:07:43,207 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 22:07:43,212 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 22:07:43,212 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,213 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@206abe13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43, skipping insertion in model container [2024-09-12 22:07:43,213 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,231 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 22:07:43,361 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2024-09-12 22:07:43,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:07:43,382 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 22:07:43,393 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de51.c[368,381] [2024-09-12 22:07:43,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:07:43,412 INFO L204 MainTranslator]: Completed translation [2024-09-12 22:07:43,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43 WrapperNode [2024-09-12 22:07:43,413 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 22:07:43,414 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 22:07:43,414 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 22:07:43,415 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 22:07:43,421 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,428 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,434 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 22:07:43,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 22:07:43,435 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 22:07:43,435 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 22:07:43,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 22:07:43,445 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,450 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,469 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 22:07:43,470 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,472 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,502 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,504 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 22:07:43,505 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 22:07:43,505 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 22:07:43,505 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 22:07:43,506 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (1/1) ... [2024-09-12 22:07:43,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:07:43,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:43,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 22:07:43,542 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 22:07:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 22:07:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 22:07:43,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 22:07:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 22:07:43,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 22:07:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 22:07:43,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 22:07:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 22:07:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 22:07:43,598 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 22:07:43,666 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 22:07:43,669 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 22:07:43,846 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-12 22:07:43,849 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 22:07:43,873 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 22:07:43,873 INFO L318 CfgBuilder]: Removed 5 assume(true) statements. [2024-09-12 22:07:43,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:07:43 BoogieIcfgContainer [2024-09-12 22:07:43,874 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 22:07:43,876 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 22:07:43,876 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 22:07:43,880 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 22:07:43,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 10:07:43" (1/3) ... [2024-09-12 22:07:43,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580c39f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:07:43, skipping insertion in model container [2024-09-12 22:07:43,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:07:43" (2/3) ... [2024-09-12 22:07:43,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580c39f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:07:43, skipping insertion in model container [2024-09-12 22:07:43,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:07:43" (3/3) ... [2024-09-12 22:07:43,883 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de51.c [2024-09-12 22:07:43,897 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 22:07:43,897 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 22:07:43,943 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 22:07:43,949 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;@28997243, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 22:07:43,950 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 22:07:43,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 22:07:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-12 22:07:43,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:43,964 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:43,964 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:43,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:43,969 INFO L85 PathProgramCache]: Analyzing trace with hash -356520028, now seen corresponding path program 1 times [2024-09-12 22:07:43,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:43,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286001183] [2024-09-12 22:07:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:43,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:44,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:44,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:44,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286001183] [2024-09-12 22:07:44,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286001183] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:07:44,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:07:44,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 22:07:44,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132351678] [2024-09-12 22:07:44,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:07:44,104 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 22:07:44,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:44,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 22:07:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 22:07:44,130 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:44,155 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2024-09-12 22:07:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 22:07:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-12 22:07:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:44,166 INFO L225 Difference]: With dead ends: 38 [2024-09-12 22:07:44,166 INFO L226 Difference]: Without dead ends: 16 [2024-09-12 22:07:44,169 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 [2024-09-12 22:07:44,173 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:44,174 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:07:44,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-12 22:07:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-12 22:07:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-09-12 22:07:44,204 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 15 [2024-09-12 22:07:44,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:44,204 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-09-12 22:07:44,204 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:44,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-09-12 22:07:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-12 22:07:44,206 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:44,206 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:44,206 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 22:07:44,207 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:44,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:44,207 INFO L85 PathProgramCache]: Analyzing trace with hash 315017388, now seen corresponding path program 1 times [2024-09-12 22:07:44,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:44,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657909326] [2024-09-12 22:07:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:44,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:44,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:44,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:44,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657909326] [2024-09-12 22:07:44,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657909326] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:07:44,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:07:44,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 22:07:44,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639236289] [2024-09-12 22:07:44,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:07:44,760 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 22:07:44,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:44,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 22:07:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 22:07:44,762 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:44,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:44,828 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2024-09-12 22:07:44,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 22:07:44,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-12 22:07:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:44,829 INFO L225 Difference]: With dead ends: 27 [2024-09-12 22:07:44,829 INFO L226 Difference]: Without dead ends: 22 [2024-09-12 22:07:44,830 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 [2024-09-12 22:07:44,833 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:44,833 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:07:44,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-12 22:07:44,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-12 22:07:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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) [2024-09-12 22:07:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2024-09-12 22:07:44,842 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 15 [2024-09-12 22:07:44,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:44,843 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2024-09-12 22:07:44,843 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:44,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2024-09-12 22:07:44,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 22:07:44,844 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:44,845 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:44,845 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 22:07:44,845 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:44,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1680996671, now seen corresponding path program 1 times [2024-09-12 22:07:44,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:44,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819710596] [2024-09-12 22:07:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:44,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:44,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:44,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:44,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819710596] [2024-09-12 22:07:44,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819710596] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:07:44,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:07:44,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:07:44,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337421060] [2024-09-12 22:07:44,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:07:44,910 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:07:44,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:07:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:07:44,912 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:44,948 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2024-09-12 22:07:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:07:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-12 22:07:44,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:44,953 INFO L225 Difference]: With dead ends: 34 [2024-09-12 22:07:44,954 INFO L226 Difference]: Without dead ends: 27 [2024-09-12 22:07:44,954 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 [2024-09-12 22:07:44,956 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:44,957 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:07:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-12 22:07:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-09-12 22:07:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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) [2024-09-12 22:07:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-09-12 22:07:44,971 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2024-09-12 22:07:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:44,971 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-09-12 22:07:44,971 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:44,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:44,975 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-09-12 22:07:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 22:07:44,976 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:44,976 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:44,976 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 22:07:44,976 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:44,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1211142226, now seen corresponding path program 1 times [2024-09-12 22:07:44,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:44,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023159927] [2024-09-12 22:07:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:44,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:45,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:45,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:45,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023159927] [2024-09-12 22:07:45,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023159927] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:07:45,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:07:45,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:07:45,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393052629] [2024-09-12 22:07:45,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:07:45,029 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:07:45,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:45,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:07:45,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:07:45,032 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:45,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:45,069 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2024-09-12 22:07:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:07:45,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-12 22:07:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:45,071 INFO L225 Difference]: With dead ends: 39 [2024-09-12 22:07:45,071 INFO L226 Difference]: Without dead ends: 31 [2024-09-12 22:07:45,071 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 [2024-09-12 22:07:45,072 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:45,073 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:07:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-12 22:07:45,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-12 22:07:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 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) [2024-09-12 22:07:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2024-09-12 22:07:45,090 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 16 [2024-09-12 22:07:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:45,090 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2024-09-12 22:07:45,090 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:45,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2024-09-12 22:07:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 22:07:45,093 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:45,093 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:45,093 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-12 22:07:45,094 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:45,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:45,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1644628767, now seen corresponding path program 1 times [2024-09-12 22:07:45,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:45,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073981283] [2024-09-12 22:07:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:45,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:45,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:45,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:45,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:45,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073981283] [2024-09-12 22:07:45,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073981283] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:07:45,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:07:45,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 22:07:45,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228305121] [2024-09-12 22:07:45,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:07:45,175 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:07:45,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:45,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:07:45,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:07:45,176 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:45,232 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2024-09-12 22:07:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:07:45,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-12 22:07:45,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:45,237 INFO L225 Difference]: With dead ends: 43 [2024-09-12 22:07:45,237 INFO L226 Difference]: Without dead ends: 25 [2024-09-12 22:07:45,237 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 [2024-09-12 22:07:45,238 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:45,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:07:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-12 22:07:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-09-12 22:07:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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) [2024-09-12 22:07:45,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-09-12 22:07:45,250 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 16 [2024-09-12 22:07:45,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:45,251 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-09-12 22:07:45,251 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:45,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:45,251 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-09-12 22:07:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-12 22:07:45,252 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:45,252 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:45,252 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-12 22:07:45,252 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:45,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:45,254 INFO L85 PathProgramCache]: Analyzing trace with hash -677262176, now seen corresponding path program 1 times [2024-09-12 22:07:45,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:45,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078138933] [2024-09-12 22:07:45,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:45,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:45,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:45,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:45,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078138933] [2024-09-12 22:07:45,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078138933] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:45,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829013752] [2024-09-12 22:07:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:45,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:45,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:45,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:07:45,358 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 22:07:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:45,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 22:07:45,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:45,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:45,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829013752] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:45,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:45,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-12 22:07:45,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15404240] [2024-09-12 22:07:45,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:45,500 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 22:07:45,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:45,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 22:07:45,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:07:45,501 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:45,661 INFO L93 Difference]: Finished difference Result 74 states and 113 transitions. [2024-09-12 22:07:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 22:07:45,662 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-12 22:07:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:45,663 INFO L225 Difference]: With dead ends: 74 [2024-09-12 22:07:45,663 INFO L226 Difference]: Without dead ends: 60 [2024-09-12 22:07:45,664 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-09-12 22:07:45,664 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:45,665 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 87 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:07:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-12 22:07:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2024-09-12 22:07:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.46875) internal successors, (47), 32 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) [2024-09-12 22:07:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2024-09-12 22:07:45,676 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 16 [2024-09-12 22:07:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:45,676 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2024-09-12 22:07:45,676 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:45,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2024-09-12 22:07:45,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-12 22:07:45,677 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:45,677 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:45,694 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 22:07:45,878 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 22:07:45,878 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:45,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1860399215, now seen corresponding path program 1 times [2024-09-12 22:07:45,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:45,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744640311] [2024-09-12 22:07:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:45,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:45,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:46,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:46,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744640311] [2024-09-12 22:07:46,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744640311] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:46,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62192884] [2024-09-12 22:07:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:46,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:46,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:46,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:07:46,006 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 22:07:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:46,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 22:07:46,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:46,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:46,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62192884] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:46,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:46,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-12 22:07:46,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435630552] [2024-09-12 22:07:46,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:46,153 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 22:07:46,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:46,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 22:07:46,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:07:46,158 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2024-09-12 22:07:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:46,523 INFO L93 Difference]: Finished difference Result 91 states and 140 transitions. [2024-09-12 22:07:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 22:07:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 18 [2024-09-12 22:07:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:46,525 INFO L225 Difference]: With dead ends: 91 [2024-09-12 22:07:46,525 INFO L226 Difference]: Without dead ends: 81 [2024-09-12 22:07:46,526 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2024-09-12 22:07:46,527 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:46,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 97 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:07:46,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-12 22:07:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 44. [2024-09-12 22:07:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.4615384615384615) internal successors, (57), 39 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) [2024-09-12 22:07:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2024-09-12 22:07:46,540 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 18 [2024-09-12 22:07:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:46,541 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2024-09-12 22:07:46,541 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2024-09-12 22:07:46,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2024-09-12 22:07:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 22:07:46,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:46,542 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:46,557 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 22:07:46,743 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 22:07:46,743 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:46,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1802263027, now seen corresponding path program 1 times [2024-09-12 22:07:46,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:46,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049132039] [2024-09-12 22:07:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:46,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:46,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:07:46,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:46,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049132039] [2024-09-12 22:07:46,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049132039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:46,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708229540] [2024-09-12 22:07:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:46,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:46,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:46,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:07:46,821 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 22:07:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:46,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 22:07:46,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:07:46,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 22:07:46,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708229540] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:46,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:46,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-09-12 22:07:46,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187927151] [2024-09-12 22:07:46,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:46,940 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 22:07:46,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:46,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 22:07:46,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:07:46,942 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:46,994 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2024-09-12 22:07:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 22:07:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-12 22:07:46,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:46,995 INFO L225 Difference]: With dead ends: 71 [2024-09-12 22:07:46,998 INFO L226 Difference]: Without dead ends: 62 [2024-09-12 22:07:46,998 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 22:07:46,999 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:46,999 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:07:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-12 22:07:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2024-09-12 22:07:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.469387755102041) internal successors, (72), 49 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) [2024-09-12 22:07:47,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2024-09-12 22:07:47,022 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 19 [2024-09-12 22:07:47,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:47,022 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2024-09-12 22:07:47,023 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:47,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:47,023 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2024-09-12 22:07:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-12 22:07:47,024 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:47,024 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:47,039 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 22:07:47,224 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-12 22:07:47,224 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:47,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash -211671636, now seen corresponding path program 2 times [2024-09-12 22:07:47,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:47,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745250039] [2024-09-12 22:07:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:47,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:47,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:47,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:47,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745250039] [2024-09-12 22:07:47,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745250039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:47,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144960034] [2024-09-12 22:07:47,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:07:47,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:47,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:47,346 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:07:47,347 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 22:07:47,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:07:47,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:07:47,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 22:07:47,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:47,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:47,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144960034] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:47,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:47,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-12 22:07:47,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815279053] [2024-09-12 22:07:47,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:47,517 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 22:07:47,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 22:07:47,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:07:47,518 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2024-09-12 22:07:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:48,185 INFO L93 Difference]: Finished difference Result 224 states and 356 transitions. [2024-09-12 22:07:48,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 22:07:48,185 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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 19 [2024-09-12 22:07:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:48,187 INFO L225 Difference]: With dead ends: 224 [2024-09-12 22:07:48,187 INFO L226 Difference]: Without dead ends: 200 [2024-09-12 22:07:48,188 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2024-09-12 22:07:48,188 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 226 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:48,189 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 270 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:07:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-09-12 22:07:48,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 81. [2024-09-12 22:07:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 76 states have internal predecessors, (110), 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) [2024-09-12 22:07:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2024-09-12 22:07:48,222 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 19 [2024-09-12 22:07:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:48,222 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2024-09-12 22:07:48,222 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 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) [2024-09-12 22:07:48,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2024-09-12 22:07:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-12 22:07:48,224 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:48,224 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:48,241 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 22:07:48,424 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:48,424 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:48,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:48,425 INFO L85 PathProgramCache]: Analyzing trace with hash 537966210, now seen corresponding path program 1 times [2024-09-12 22:07:48,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:48,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301820892] [2024-09-12 22:07:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:48,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:48,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:07:48,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:48,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301820892] [2024-09-12 22:07:48,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301820892] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:48,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068720577] [2024-09-12 22:07:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:48,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:48,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:48,704 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:07:48,705 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 22:07:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:48,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 22:07:48,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:07:48,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 22:07:48,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068720577] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:48,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:48,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2024-09-12 22:07:48,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668072891] [2024-09-12 22:07:48,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:48,949 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 22:07:48,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:48,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 22:07:48,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-09-12 22:07:48,950 INFO L87 Difference]: Start difference. First operand 81 states and 114 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:49,074 INFO L93 Difference]: Finished difference Result 95 states and 129 transitions. [2024-09-12 22:07:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 22:07:49,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-12 22:07:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:49,076 INFO L225 Difference]: With dead ends: 95 [2024-09-12 22:07:49,076 INFO L226 Difference]: Without dead ends: 75 [2024-09-12 22:07:49,076 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:07:49,077 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:49,077 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:07:49,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-12 22:07:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2024-09-12 22:07:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.4705882352941178) internal successors, (100), 68 states have internal predecessors, (100), 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) [2024-09-12 22:07:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 104 transitions. [2024-09-12 22:07:49,107 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 104 transitions. Word has length 20 [2024-09-12 22:07:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:49,107 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 104 transitions. [2024-09-12 22:07:49,107 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:49,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 104 transitions. [2024-09-12 22:07:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 22:07:49,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:49,108 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:49,133 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 22:07:49,312 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 22:07:49,313 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:49,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:49,313 INFO L85 PathProgramCache]: Analyzing trace with hash 548739116, now seen corresponding path program 1 times [2024-09-12 22:07:49,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:49,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601938683] [2024-09-12 22:07:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:49,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:49,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:07:49,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:49,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601938683] [2024-09-12 22:07:49,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601938683] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:49,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091645728] [2024-09-12 22:07:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:49,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:49,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:49,398 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:07:49,400 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 22:07:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:49,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:07:49,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:07:49,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 22:07:49,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091645728] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:49,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:49,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-12 22:07:49,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398150246] [2024-09-12 22:07:49,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:49,567 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 22:07:49,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:49,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 22:07:49,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-12 22:07:49,570 INFO L87 Difference]: Start difference. First operand 73 states and 104 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:49,755 INFO L93 Difference]: Finished difference Result 115 states and 164 transitions. [2024-09-12 22:07:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 22:07:49,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-12 22:07:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:49,757 INFO L225 Difference]: With dead ends: 115 [2024-09-12 22:07:49,758 INFO L226 Difference]: Without dead ends: 95 [2024-09-12 22:07:49,758 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-09-12 22:07:49,759 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:49,760 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 118 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:07:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-12 22:07:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2024-09-12 22:07:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 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) [2024-09-12 22:07:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2024-09-12 22:07:49,789 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 21 [2024-09-12 22:07:49,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:49,790 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2024-09-12 22:07:49,790 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:49,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:49,790 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2024-09-12 22:07:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-12 22:07:49,791 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:49,791 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:49,807 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 22:07:49,991 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 22:07:49,991 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:49,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash 47519372, now seen corresponding path program 2 times [2024-09-12 22:07:49,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:49,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082030358] [2024-09-12 22:07:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:49,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:50,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:50,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:50,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082030358] [2024-09-12 22:07:50,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082030358] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:50,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150365579] [2024-09-12 22:07:50,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:07:50,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:50,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:50,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:07:50,110 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 22:07:50,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:07:50,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:07:50,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 22:07:50,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:07:50,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:07:50,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150365579] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:50,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:50,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-09-12 22:07:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388613365] [2024-09-12 22:07:50,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:50,288 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 22:07:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:50,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 22:07:50,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-09-12 22:07:50,289 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:50,765 INFO L93 Difference]: Finished difference Result 125 states and 185 transitions. [2024-09-12 22:07:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 22:07:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-12 22:07:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:50,766 INFO L225 Difference]: With dead ends: 125 [2024-09-12 22:07:50,767 INFO L226 Difference]: Without dead ends: 111 [2024-09-12 22:07:50,767 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:07:50,768 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:50,768 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 151 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:07:50,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-12 22:07:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2024-09-12 22:07:50,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.4146341463414633) internal successors, (116), 82 states have internal predecessors, (116), 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) [2024-09-12 22:07:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2024-09-12 22:07:50,805 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 21 [2024-09-12 22:07:50,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:50,805 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2024-09-12 22:07:50,805 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:50,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2024-09-12 22:07:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 22:07:50,806 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:50,807 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:50,823 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 22:07:51,010 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:51,011 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:51,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:51,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1261948831, now seen corresponding path program 2 times [2024-09-12 22:07:51,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:51,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241378078] [2024-09-12 22:07:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:51,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:51,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-12 22:07:51,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:51,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241378078] [2024-09-12 22:07:51,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241378078] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:51,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710464777] [2024-09-12 22:07:51,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:07:51,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:51,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:51,092 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:07:51,094 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 22:07:51,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:07:51,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:07:51,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:07:51,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:07:51,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:07:51,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710464777] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:51,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:51,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-09-12 22:07:51,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632848400] [2024-09-12 22:07:51,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:51,222 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 22:07:51,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:51,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 22:07:51,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-12 22:07:51,223 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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) [2024-09-12 22:07:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:51,392 INFO L93 Difference]: Finished difference Result 176 states and 262 transitions. [2024-09-12 22:07:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 22:07:51,392 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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 24 [2024-09-12 22:07:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:51,394 INFO L225 Difference]: With dead ends: 176 [2024-09-12 22:07:51,394 INFO L226 Difference]: Without dead ends: 162 [2024-09-12 22:07:51,394 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:07:51,395 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:51,395 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 91 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:07:51,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-12 22:07:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2024-09-12 22:07:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.432) internal successors, (179), 125 states have internal predecessors, (179), 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) [2024-09-12 22:07:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 183 transitions. [2024-09-12 22:07:51,457 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 183 transitions. Word has length 24 [2024-09-12 22:07:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:51,458 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 183 transitions. [2024-09-12 22:07:51,458 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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) [2024-09-12 22:07:51,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 183 transitions. [2024-09-12 22:07:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-12 22:07:51,459 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:51,459 INFO L216 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:51,476 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-12 22:07:51,659 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:51,660 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:51,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash 453474690, now seen corresponding path program 3 times [2024-09-12 22:07:51,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:51,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378618482] [2024-09-12 22:07:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:51,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:51,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:07:51,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:51,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378618482] [2024-09-12 22:07:51,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378618482] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:51,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75367447] [2024-09-12 22:07:51,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:07:51,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:51,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:51,785 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:07:51,788 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 22:07:51,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:07:51,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:07:51,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 22:07:51,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:07:51,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:07:51,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75367447] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:51,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:51,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-09-12 22:07:51,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094805186] [2024-09-12 22:07:51,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:51,971 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 22:07:51,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 22:07:51,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-09-12 22:07:51,972 INFO L87 Difference]: Start difference. First operand 130 states and 183 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2024-09-12 22:07:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:53,637 INFO L93 Difference]: Finished difference Result 373 states and 573 transitions. [2024-09-12 22:07:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-12 22:07:53,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 24 [2024-09-12 22:07:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:53,639 INFO L225 Difference]: With dead ends: 373 [2024-09-12 22:07:53,639 INFO L226 Difference]: Without dead ends: 326 [2024-09-12 22:07:53,641 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2024-09-12 22:07:53,641 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 362 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:53,642 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 399 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:07:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-09-12 22:07:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 160. [2024-09-12 22:07:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.4387096774193548) internal successors, (223), 155 states have internal predecessors, (223), 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) [2024-09-12 22:07:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 227 transitions. [2024-09-12 22:07:53,695 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 227 transitions. Word has length 24 [2024-09-12 22:07:53,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:53,695 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 227 transitions. [2024-09-12 22:07:53,695 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2024-09-12 22:07:53,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 227 transitions. [2024-09-12 22:07:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 22:07:53,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:53,696 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:53,711 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 22:07:53,900 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-12 22:07:53,900 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:53,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:53,901 INFO L85 PathProgramCache]: Analyzing trace with hash -931809812, now seen corresponding path program 4 times [2024-09-12 22:07:53,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:53,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438358176] [2024-09-12 22:07:53,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:53,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:54,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:07:54,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:54,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438358176] [2024-09-12 22:07:54,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438358176] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:54,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347402359] [2024-09-12 22:07:54,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:07:54,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:54,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:54,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:07:54,194 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 22:07:54,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:07:54,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:07:54,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 22:07:54,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:07:54,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:07:54,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347402359] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:54,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:54,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 16 [2024-09-12 22:07:54,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008203903] [2024-09-12 22:07:54,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:54,395 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 22:07:54,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:54,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 22:07:54,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-09-12 22:07:54,396 INFO L87 Difference]: Start difference. First operand 160 states and 227 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:54,538 INFO L93 Difference]: Finished difference Result 166 states and 232 transitions. [2024-09-12 22:07:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 22:07:54,539 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-12 22:07:54,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:54,540 INFO L225 Difference]: With dead ends: 166 [2024-09-12 22:07:54,540 INFO L226 Difference]: Without dead ends: 148 [2024-09-12 22:07:54,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-09-12 22:07:54,541 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:54,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 111 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:07:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-09-12 22:07:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2024-09-12 22:07:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.4685314685314685) internal successors, (210), 143 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) [2024-09-12 22:07:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 214 transitions. [2024-09-12 22:07:54,608 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 214 transitions. Word has length 25 [2024-09-12 22:07:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:54,608 INFO L474 AbstractCegarLoop]: Abstraction has 148 states and 214 transitions. [2024-09-12 22:07:54,608 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:54,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 214 transitions. [2024-09-12 22:07:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 22:07:54,610 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:54,610 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:54,626 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 22:07:54,814 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 22:07:54,815 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:54,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:54,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1117230082, now seen corresponding path program 2 times [2024-09-12 22:07:54,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:54,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190098455] [2024-09-12 22:07:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:54,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:54,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:07:54,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:54,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190098455] [2024-09-12 22:07:54,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190098455] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:54,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967575265] [2024-09-12 22:07:54,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:07:54,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:54,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:54,908 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) [2024-09-12 22:07:54,910 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 22:07:54,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:07:54,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:07:54,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 22:07:54,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:07:54,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:07:55,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967575265] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:55,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:55,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2024-09-12 22:07:55,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299201193] [2024-09-12 22:07:55,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:55,110 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 22:07:55,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:55,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 22:07:55,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-09-12 22:07:55,111 INFO L87 Difference]: Start difference. First operand 148 states and 214 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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) [2024-09-12 22:07:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:55,489 INFO L93 Difference]: Finished difference Result 223 states and 312 transitions. [2024-09-12 22:07:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 22:07:55,489 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 [2024-09-12 22:07:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:55,491 INFO L225 Difference]: With dead ends: 223 [2024-09-12 22:07:55,491 INFO L226 Difference]: Without dead ends: 189 [2024-09-12 22:07:55,492 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:07:55,492 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:55,492 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 216 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:07:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-09-12 22:07:55,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 138. [2024-09-12 22:07:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.4511278195488722) internal successors, (193), 133 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:55,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 197 transitions. [2024-09-12 22:07:55,556 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 197 transitions. Word has length 25 [2024-09-12 22:07:55,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:55,557 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 197 transitions. [2024-09-12 22:07:55,557 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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) [2024-09-12 22:07:55,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 197 transitions. [2024-09-12 22:07:55,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 22:07:55,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:55,558 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:55,575 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 22:07:55,758 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 22:07:55,758 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:55,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1301171089, now seen corresponding path program 3 times [2024-09-12 22:07:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:55,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781753513] [2024-09-12 22:07:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:55,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:55,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:07:55,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:55,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781753513] [2024-09-12 22:07:55,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781753513] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:55,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398812092] [2024-09-12 22:07:55,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:07:55,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:55,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:55,892 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) [2024-09-12 22:07:55,893 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 22:07:55,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:07:55,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:07:55,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:07:55,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:07:56,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:07:56,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398812092] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:56,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:56,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2024-09-12 22:07:56,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076698533] [2024-09-12 22:07:56,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:56,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 22:07:56,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:56,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 22:07:56,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-09-12 22:07:56,129 INFO L87 Difference]: Start difference. First operand 138 states and 197 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:07:56,721 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2024-09-12 22:07:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-12 22:07:56,721 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-12 22:07:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:07:56,723 INFO L225 Difference]: With dead ends: 202 [2024-09-12 22:07:56,723 INFO L226 Difference]: Without dead ends: 186 [2024-09-12 22:07:56,723 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2024-09-12 22:07:56,724 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:07:56,724 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 188 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:07:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-09-12 22:07:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 160. [2024-09-12 22:07:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.4064516129032258) internal successors, (218), 155 states have internal predecessors, (218), 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) [2024-09-12 22:07:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 222 transitions. [2024-09-12 22:07:56,781 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 222 transitions. Word has length 26 [2024-09-12 22:07:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:07:56,781 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 222 transitions. [2024-09-12 22:07:56,781 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:07:56,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 222 transitions. [2024-09-12 22:07:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 22:07:56,782 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:07:56,782 INFO L216 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:07:56,794 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-12 22:07:56,983 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-12 22:07:56,983 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:07:56,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:07:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2140232672, now seen corresponding path program 3 times [2024-09-12 22:07:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:07:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275710835] [2024-09-12 22:07:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:07:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:07:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:57,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:07:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:07:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:57,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:07:57,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275710835] [2024-09-12 22:07:57,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275710835] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:07:57,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426731444] [2024-09-12 22:07:57,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:07:57,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:07:57,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:07:57,179 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) [2024-09-12 22:07:57,180 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 22:07:57,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 22:07:57,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:07:57,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-12 22:07:57,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:07:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:57,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:07:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:07:57,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426731444] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:07:57,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:07:57,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-12 22:07:57,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983518592] [2024-09-12 22:07:57,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:07:57,512 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-12 22:07:57,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:07:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-12 22:07:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-09-12 22:07:57,513 INFO L87 Difference]: Start difference. First operand 160 states and 222 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:08:01,047 INFO L93 Difference]: Finished difference Result 841 states and 1299 transitions. [2024-09-12 22:08:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-12 22:08:01,048 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-12 22:08:01,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:08:01,051 INFO L225 Difference]: With dead ends: 841 [2024-09-12 22:08:01,051 INFO L226 Difference]: Without dead ends: 791 [2024-09-12 22:08:01,053 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1575, Invalid=3537, Unknown=0, NotChecked=0, Total=5112 [2024-09-12 22:08:01,053 INFO L434 NwaCegarLoop]: 73 mSDtfsCounter, 1361 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:08:01,053 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 989 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-12 22:08:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2024-09-12 22:08:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 227. [2024-09-12 22:08:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.4009009009009008) internal successors, (311), 222 states have internal predecessors, (311), 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) [2024-09-12 22:08:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 315 transitions. [2024-09-12 22:08:01,154 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 315 transitions. Word has length 26 [2024-09-12 22:08:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:08:01,154 INFO L474 AbstractCegarLoop]: Abstraction has 227 states and 315 transitions. [2024-09-12 22:08:01,154 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:01,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 315 transitions. [2024-09-12 22:08:01,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-12 22:08:01,155 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:08:01,155 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:08:01,168 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-12 22:08:01,355 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-12 22:08:01,356 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:08:01,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1872800161, now seen corresponding path program 3 times [2024-09-12 22:08:01,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:08:01,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13007669] [2024-09-12 22:08:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:08:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:08:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:01,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:08:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 22:08:01,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:08:01,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13007669] [2024-09-12 22:08:01,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13007669] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:08:01,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955931076] [2024-09-12 22:08:01,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:08:01,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:01,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:08:01,490 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) [2024-09-12 22:08:01,491 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 22:08:01,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 22:08:01,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:08:01,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 22:08:01,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:08:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 22:08:01,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:08:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 22:08:01,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955931076] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:08:01,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:08:01,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 22 [2024-09-12 22:08:01,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524603630] [2024-09-12 22:08:01,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:08:01,710 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 22:08:01,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:08:01,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 22:08:01,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:08:01,711 INFO L87 Difference]: Start difference. First operand 227 states and 315 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:08:02,565 INFO L93 Difference]: Finished difference Result 594 states and 780 transitions. [2024-09-12 22:08:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-12 22:08:02,566 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-12 22:08:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:08:02,568 INFO L225 Difference]: With dead ends: 594 [2024-09-12 22:08:02,568 INFO L226 Difference]: Without dead ends: 566 [2024-09-12 22:08:02,569 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=533, Invalid=1819, Unknown=0, NotChecked=0, Total=2352 [2024-09-12 22:08:02,570 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 127 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:08:02,570 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 297 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:08:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2024-09-12 22:08:02,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 331. [2024-09-12 22:08:02,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.4049079754601228) internal successors, (458), 326 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) [2024-09-12 22:08:02,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 462 transitions. [2024-09-12 22:08:02,733 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 462 transitions. Word has length 28 [2024-09-12 22:08:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:08:02,734 INFO L474 AbstractCegarLoop]: Abstraction has 331 states and 462 transitions. [2024-09-12 22:08:02,734 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:02,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 462 transitions. [2024-09-12 22:08:02,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 22:08:02,735 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:08:02,735 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:08:02,751 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-12 22:08:02,939 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:02,940 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:08:02,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:02,940 INFO L85 PathProgramCache]: Analyzing trace with hash 398019010, now seen corresponding path program 5 times [2024-09-12 22:08:02,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:08:02,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135403614] [2024-09-12 22:08:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:08:02,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:08:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:03,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:08:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:08:03,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:08:03,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135403614] [2024-09-12 22:08:03,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135403614] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:08:03,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668624373] [2024-09-12 22:08:03,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:08:03,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:03,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:08:03,391 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) [2024-09-12 22:08:03,392 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 22:08:03,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 22:08:03,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:08:03,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-12 22:08:03,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:08:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:08:03,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:08:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:08:03,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668624373] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:08:03,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:08:03,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 20 [2024-09-12 22:08:03,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843405601] [2024-09-12 22:08:03,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:08:03,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 22:08:03,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:08:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 22:08:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-09-12 22:08:03,696 INFO L87 Difference]: Start difference. First operand 331 states and 462 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:07,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:08:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:08:08,052 INFO L93 Difference]: Finished difference Result 344 states and 475 transitions. [2024-09-12 22:08:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 22:08:08,053 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-12 22:08:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:08:08,055 INFO L225 Difference]: With dead ends: 344 [2024-09-12 22:08:08,055 INFO L226 Difference]: Without dead ends: 335 [2024-09-12 22:08:08,055 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:08:08,056 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:08:08,057 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-09-12 22:08:08,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2024-09-12 22:08:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 332. [2024-09-12 22:08:08,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.4036697247706422) internal successors, (459), 327 states have internal predecessors, (459), 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) [2024-09-12 22:08:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 463 transitions. [2024-09-12 22:08:08,202 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 463 transitions. Word has length 30 [2024-09-12 22:08:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:08:08,203 INFO L474 AbstractCegarLoop]: Abstraction has 332 states and 463 transitions. [2024-09-12 22:08:08,203 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 18 states have internal predecessors, (64), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:08,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 463 transitions. [2024-09-12 22:08:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 22:08:08,204 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:08:08,204 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:08:08,220 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 22:08:08,408 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:08,408 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:08:08,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:08,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1118269741, now seen corresponding path program 6 times [2024-09-12 22:08:08,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:08:08,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510028622] [2024-09-12 22:08:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:08:08,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:08:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:08,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:08:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 22:08:08,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:08:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510028622] [2024-09-12 22:08:08,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510028622] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:08:08,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475820745] [2024-09-12 22:08:08,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:08:08,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:08,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:08:08,511 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) [2024-09-12 22:08:08,513 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 22:08:08,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-12 22:08:08,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:08:08,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 22:08:08,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:08:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 22:08:08,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:08:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 22:08:08,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475820745] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:08:08,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:08:08,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-12 22:08:08,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088698433] [2024-09-12 22:08:08,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:08:08,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 22:08:08,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:08:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 22:08:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:08:08,665 INFO L87 Difference]: Start difference. First operand 332 states and 463 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:08,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:08:08,967 INFO L93 Difference]: Finished difference Result 393 states and 542 transitions. [2024-09-12 22:08:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 22:08:08,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-12 22:08:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:08:08,970 INFO L225 Difference]: With dead ends: 393 [2024-09-12 22:08:08,970 INFO L226 Difference]: Without dead ends: 361 [2024-09-12 22:08:08,971 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-12 22:08:08,971 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:08:08,972 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 125 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:08:08,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2024-09-12 22:08:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 333. [2024-09-12 22:08:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.399390243902439) internal successors, (459), 328 states have internal predecessors, (459), 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) [2024-09-12 22:08:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 463 transitions. [2024-09-12 22:08:09,268 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 463 transitions. Word has length 31 [2024-09-12 22:08:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:08:09,268 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 463 transitions. [2024-09-12 22:08:09,268 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:09,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 463 transitions. [2024-09-12 22:08:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 22:08:09,269 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:08:09,269 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:08:09,287 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-12 22:08:09,473 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:09,474 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:08:09,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:09,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1904854835, now seen corresponding path program 2 times [2024-09-12 22:08:09,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:08:09,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065710382] [2024-09-12 22:08:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:08:09,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:08:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:09,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:08:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:08:09,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:08:09,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065710382] [2024-09-12 22:08:09,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065710382] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:08:09,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501461323] [2024-09-12 22:08:09,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:08:09,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:09,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:08:09,692 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) [2024-09-12 22:08:09,694 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 22:08:09,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:08:09,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:08:09,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 22:08:09,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:08:09,774 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:08:09,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:08:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 22:08:09,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501461323] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:08:09,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:08:09,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 8] total 21 [2024-09-12 22:08:09,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742688643] [2024-09-12 22:08:09,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:08:09,926 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 22:08:09,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:08:09,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 22:08:09,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:08:09,928 INFO L87 Difference]: Start difference. First operand 333 states and 463 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:08:11,204 INFO L93 Difference]: Finished difference Result 556 states and 735 transitions. [2024-09-12 22:08:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-12 22:08:11,205 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-12 22:08:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:08:11,207 INFO L225 Difference]: With dead ends: 556 [2024-09-12 22:08:11,207 INFO L226 Difference]: Without dead ends: 533 [2024-09-12 22:08:11,209 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=811, Invalid=3221, Unknown=0, NotChecked=0, Total=4032 [2024-09-12 22:08:11,210 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 150 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:08:11,210 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 322 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:08:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2024-09-12 22:08:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 351. [2024-09-12 22:08:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.3815028901734103) internal successors, (478), 346 states have internal predecessors, (478), 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) [2024-09-12 22:08:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 482 transitions. [2024-09-12 22:08:11,475 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 482 transitions. Word has length 31 [2024-09-12 22:08:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:08:11,475 INFO L474 AbstractCegarLoop]: Abstraction has 351 states and 482 transitions. [2024-09-12 22:08:11,475 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:11,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 482 transitions. [2024-09-12 22:08:11,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 22:08:11,476 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:08:11,476 INFO L216 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:08:11,492 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-12 22:08:11,680 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:11,681 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:08:11,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:11,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1643388018, now seen corresponding path program 7 times [2024-09-12 22:08:11,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:08:11,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825916694] [2024-09-12 22:08:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:08:11,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:08:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:11,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:08:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:08:11,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:08:11,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825916694] [2024-09-12 22:08:11,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825916694] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:08:11,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653574698] [2024-09-12 22:08:11,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:08:11,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:11,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:08:11,911 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) [2024-09-12 22:08:11,913 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 22:08:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:11,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-12 22:08:11,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:08:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:08:12,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:08:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:08:12,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653574698] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:08:12,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:08:12,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-12 22:08:12,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615774820] [2024-09-12 22:08:12,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:08:12,444 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 22:08:12,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:08:12,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 22:08:12,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 22:08:12,446 INFO L87 Difference]: Start difference. First operand 351 states and 482 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 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) [2024-09-12 22:08:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:08:22,757 INFO L93 Difference]: Finished difference Result 1398 states and 2123 transitions. [2024-09-12 22:08:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2024-09-12 22:08:22,758 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 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 31 [2024-09-12 22:08:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:08:22,763 INFO L225 Difference]: With dead ends: 1398 [2024-09-12 22:08:22,763 INFO L226 Difference]: Without dead ends: 1291 [2024-09-12 22:08:22,767 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7001 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=5082, Invalid=13550, Unknown=0, NotChecked=0, Total=18632 [2024-09-12 22:08:22,768 INFO L434 NwaCegarLoop]: 81 mSDtfsCounter, 1326 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:08:22,768 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 1314 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-12 22:08:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2024-09-12 22:08:23,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 382. [2024-09-12 22:08:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.389920424403183) internal successors, (524), 377 states have internal predecessors, (524), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 528 transitions. [2024-09-12 22:08:23,029 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 528 transitions. Word has length 31 [2024-09-12 22:08:23,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:08:23,029 INFO L474 AbstractCegarLoop]: Abstraction has 382 states and 528 transitions. [2024-09-12 22:08:23,030 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 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) [2024-09-12 22:08:23,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:23,030 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 528 transitions. [2024-09-12 22:08:23,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 22:08:23,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:08:23,031 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:08:23,046 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-12 22:08:23,231 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-12 22:08:23,231 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:08:23,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:23,232 INFO L85 PathProgramCache]: Analyzing trace with hash -737150836, now seen corresponding path program 8 times [2024-09-12 22:08:23,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:08:23,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492894966] [2024-09-12 22:08:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:08:23,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:08:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:23,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:08:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 22:08:23,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:08:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492894966] [2024-09-12 22:08:23,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492894966] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:08:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647285146] [2024-09-12 22:08:23,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:08:23,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:23,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:08:23,462 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) [2024-09-12 22:08:23,467 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 22:08:23,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:08:23,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:08:23,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 22:08:23,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:08:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-12 22:08:23,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:08:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-12 22:08:23,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647285146] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:08:23,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:08:23,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-12 22:08:23,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619404100] [2024-09-12 22:08:23,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:08:23,783 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 22:08:23,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:08:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 22:08:23,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-09-12 22:08:23,784 INFO L87 Difference]: Start difference. First operand 382 states and 528 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2024-09-12 22:08:28,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:08:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:08:28,456 INFO L93 Difference]: Finished difference Result 741 states and 1098 transitions. [2024-09-12 22:08:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 22:08:28,456 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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 33 [2024-09-12 22:08:28,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:08:28,460 INFO L225 Difference]: With dead ends: 741 [2024-09-12 22:08:28,460 INFO L226 Difference]: Without dead ends: 719 [2024-09-12 22:08:28,461 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2024-09-12 22:08:28,461 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 113 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 77 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:08:28,461 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 161 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 94 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-09-12 22:08:28,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2024-09-12 22:08:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 529. [2024-09-12 22:08:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 524 states have (on average 1.4312977099236641) internal successors, (750), 524 states have internal predecessors, (750), 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) [2024-09-12 22:08:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 754 transitions. [2024-09-12 22:08:28,785 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 754 transitions. Word has length 33 [2024-09-12 22:08:28,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:08:28,785 INFO L474 AbstractCegarLoop]: Abstraction has 529 states and 754 transitions. [2024-09-12 22:08:28,786 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 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) [2024-09-12 22:08:28,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 754 transitions. [2024-09-12 22:08:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 22:08:28,787 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:08:28,787 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:08:28,802 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-12 22:08:28,987 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-12 22:08:28,987 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:08:28,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:28,988 INFO L85 PathProgramCache]: Analyzing trace with hash 434530706, now seen corresponding path program 9 times [2024-09-12 22:08:28,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:08:28,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381821512] [2024-09-12 22:08:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:08:28,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:08:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:29,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:08:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 22:08:29,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:08:29,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381821512] [2024-09-12 22:08:29,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381821512] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:08:29,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648747599] [2024-09-12 22:08:29,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:08:29,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:29,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:08:29,176 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) [2024-09-12 22:08:29,178 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 22:08:29,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:08:29,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:08:29,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 22:08:29,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:08:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 22:08:29,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:08:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-12 22:08:29,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648747599] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:08:29,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:08:29,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 25 [2024-09-12 22:08:29,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963469755] [2024-09-12 22:08:29,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:08:29,478 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 22:08:29,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:08:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 22:08:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-09-12 22:08:29,479 INFO L87 Difference]: Start difference. First operand 529 states and 754 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:08:30,666 INFO L93 Difference]: Finished difference Result 805 states and 1088 transitions. [2024-09-12 22:08:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-12 22:08:30,667 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-12 22:08:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:08:30,669 INFO L225 Difference]: With dead ends: 805 [2024-09-12 22:08:30,669 INFO L226 Difference]: Without dead ends: 703 [2024-09-12 22:08:30,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=1955, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 22:08:30,671 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:08:30,671 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 494 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:08:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2024-09-12 22:08:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 497. [2024-09-12 22:08:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 492 states have (on average 1.4166666666666667) internal successors, (697), 492 states have internal predecessors, (697), 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) [2024-09-12 22:08:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 701 transitions. [2024-09-12 22:08:30,984 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 701 transitions. Word has length 34 [2024-09-12 22:08:30,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:08:30,984 INFO L474 AbstractCegarLoop]: Abstraction has 497 states and 701 transitions. [2024-09-12 22:08:30,985 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:30,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 701 transitions. [2024-09-12 22:08:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 22:08:30,986 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:08:30,986 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:08:31,002 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-12 22:08:31,186 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-12 22:08:31,187 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:08:31,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:31,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1785638100, now seen corresponding path program 10 times [2024-09-12 22:08:31,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:08:31,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416802551] [2024-09-12 22:08:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:08:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:08:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:31,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:08:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 22:08:31,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:08:31,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416802551] [2024-09-12 22:08:31,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416802551] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:08:31,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667209429] [2024-09-12 22:08:31,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:08:31,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:31,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:08:31,728 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) [2024-09-12 22:08:31,729 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 22:08:31,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:08:31,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:08:31,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-12 22:08:31,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:08:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 22:08:31,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:08:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-12 22:08:32,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667209429] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:08:32,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:08:32,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 24 [2024-09-12 22:08:32,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327524015] [2024-09-12 22:08:32,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:08:32,061 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 22:08:32,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:08:32,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 22:08:32,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:08:32,063 INFO L87 Difference]: Start difference. First operand 497 states and 701 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:36,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:08:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:08:36,497 INFO L93 Difference]: Finished difference Result 512 states and 715 transitions. [2024-09-12 22:08:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 22:08:36,498 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2024-09-12 22:08:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:08:36,500 INFO L225 Difference]: With dead ends: 512 [2024-09-12 22:08:36,500 INFO L226 Difference]: Without dead ends: 486 [2024-09-12 22:08:36,501 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2024-09-12 22:08:36,502 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:08:36,502 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 280 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-09-12 22:08:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2024-09-12 22:08:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 486. [2024-09-12 22:08:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 481 states have (on average 1.4241164241164241) internal successors, (685), 481 states have internal predecessors, (685), 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) [2024-09-12 22:08:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 689 transitions. [2024-09-12 22:08:36,875 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 689 transitions. Word has length 35 [2024-09-12 22:08:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:08:36,875 INFO L474 AbstractCegarLoop]: Abstraction has 486 states and 689 transitions. [2024-09-12 22:08:36,876 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 22 states have internal predecessors, (76), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:36,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:36,876 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 689 transitions. [2024-09-12 22:08:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 22:08:36,877 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:08:36,877 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:08:36,891 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-12 22:08:37,077 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-12 22:08:37,077 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:08:37,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:37,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1273319442, now seen corresponding path program 3 times [2024-09-12 22:08:37,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:08:37,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653994452] [2024-09-12 22:08:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:08:37,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:08:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:37,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:08:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-12 22:08:37,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:08:37,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653994452] [2024-09-12 22:08:37,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653994452] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:08:37,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746322551] [2024-09-12 22:08:37,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:08:37,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:37,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:08:37,298 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) [2024-09-12 22:08:37,300 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-12 22:08:37,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:08:37,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:08:37,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 22:08:37,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:08:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 22:08:37,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:08:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 22:08:37,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746322551] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:08:37,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:08:37,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-09-12 22:08:37,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006871704] [2024-09-12 22:08:37,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:08:37,763 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 22:08:37,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:08:37,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 22:08:37,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:08:37,764 INFO L87 Difference]: Start difference. First operand 486 states and 689 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:40,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:08:40,001 INFO L93 Difference]: Finished difference Result 939 states and 1257 transitions. [2024-09-12 22:08:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-12 22:08:40,002 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-12 22:08:40,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:08:40,004 INFO L225 Difference]: With dead ends: 939 [2024-09-12 22:08:40,004 INFO L226 Difference]: Without dead ends: 901 [2024-09-12 22:08:40,005 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1567 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1414, Invalid=5228, Unknown=0, NotChecked=0, Total=6642 [2024-09-12 22:08:40,006 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 280 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 22:08:40,006 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 495 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 22:08:40,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2024-09-12 22:08:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 485. [2024-09-12 22:08:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 480 states have (on average 1.4833333333333334) internal successors, (712), 480 states have internal predecessors, (712), 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) [2024-09-12 22:08:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 716 transitions. [2024-09-12 22:08:40,391 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 716 transitions. Word has length 36 [2024-09-12 22:08:40,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:08:40,391 INFO L474 AbstractCegarLoop]: Abstraction has 485 states and 716 transitions. [2024-09-12 22:08:40,391 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:08:40,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 716 transitions. [2024-09-12 22:08:40,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 22:08:40,392 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:08:40,392 INFO L216 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:08:40,409 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-12 22:08:40,593 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-12 22:08:40,593 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:08:40,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:08:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1377251232, now seen corresponding path program 11 times [2024-09-12 22:08:40,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:08:40,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347136621] [2024-09-12 22:08:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:08:40,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:08:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:40,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:08:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:08:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:08:40,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:08:40,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347136621] [2024-09-12 22:08:40,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347136621] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:08:40,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962613] [2024-09-12 22:08:40,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:08:40,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:08:40,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:08:40,865 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) [2024-09-12 22:08:40,867 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-12 22:08:40,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-12 22:08:40,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:08:40,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 22:08:40,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:08:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:08:40,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:08:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 22:08:41,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962613] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:08:41,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:08:41,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-12 22:08:41,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413216031] [2024-09-12 22:08:41,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:08:41,394 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-12 22:08:41,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:08:41,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-12 22:08:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 22:08:41,395 INFO L87 Difference]: Start difference. First operand 485 states and 716 transitions. Second operand has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 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) [2024-09-12 22:09:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:09:04,567 INFO L93 Difference]: Finished difference Result 1988 states and 2995 transitions. [2024-09-12 22:09:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2024-09-12 22:09:04,567 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 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 36 [2024-09-12 22:09:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:09:04,572 INFO L225 Difference]: With dead ends: 1988 [2024-09-12 22:09:04,572 INFO L226 Difference]: Without dead ends: 1785 [2024-09-12 22:09:04,576 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19625 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=11169, Invalid=37451, Unknown=0, NotChecked=0, Total=48620 [2024-09-12 22:09:04,577 INFO L434 NwaCegarLoop]: 87 mSDtfsCounter, 2055 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-12 22:09:04,577 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2055 Valid, 1388 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-12 22:09:04,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2024-09-12 22:09:05,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 584. [2024-09-12 22:09:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 579 states have (on average 1.4455958549222798) internal successors, (837), 579 states have internal predecessors, (837), 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) [2024-09-12 22:09:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 841 transitions. [2024-09-12 22:09:05,058 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 841 transitions. Word has length 36 [2024-09-12 22:09:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:09:05,058 INFO L474 AbstractCegarLoop]: Abstraction has 584 states and 841 transitions. [2024-09-12 22:09:05,059 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 37 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) [2024-09-12 22:09:05,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:09:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 841 transitions. [2024-09-12 22:09:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 22:09:05,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:09:05,061 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:09:05,076 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-12 22:09:05,264 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-12 22:09:05,265 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:09:05,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:09:05,265 INFO L85 PathProgramCache]: Analyzing trace with hash 771129250, now seen corresponding path program 12 times [2024-09-12 22:09:05,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:09:05,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959898191] [2024-09-12 22:09:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:09:05,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:09:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:09:05,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:09:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:09:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 22:09:05,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:09:05,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959898191] [2024-09-12 22:09:05,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959898191] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:09:05,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760245655] [2024-09-12 22:09:05,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:09:05,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:09:05,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:09:05,568 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) [2024-09-12 22:09:05,569 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-12 22:09:05,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 22:09:05,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:09:05,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 22:09:05,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:09:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:09:05,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:09:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:09:05,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760245655] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:09:05,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:09:05,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 24 [2024-09-12 22:09:05,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864489256] [2024-09-12 22:09:05,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:09:05,894 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 22:09:05,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:09:05,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 22:09:05,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2024-09-12 22:09:05,895 INFO L87 Difference]: Start difference. First operand 584 states and 841 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:09:14,069 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 43 DAG size of output: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:09:22,170 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 38 DAG size of output: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:09:30,262 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:09:38,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:09:46,581 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:09:54,803 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:10:03,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:10:11,367 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 22:10:24,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:10:28,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:10:32,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:10:36,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:10:40,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:10:41,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:41,457 INFO L93 Difference]: Finished difference Result 1378 states and 2122 transitions. [2024-09-12 22:10:41,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-12 22:10:41,458 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 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 [2024-09-12 22:10:41,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:41,462 INFO L225 Difference]: With dead ends: 1378 [2024-09-12 22:10:41,462 INFO L226 Difference]: Without dead ends: 1352 [2024-09-12 22:10:41,463 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 66.3s TimeCoverageRelationStatistics Valid=657, Invalid=1505, Unknown=0, NotChecked=0, Total=2162 [2024-09-12 22:10:41,463 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 179 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 138 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:41,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 339 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 220 Invalid, 7 Unknown, 0 Unchecked, 28.3s Time] [2024-09-12 22:10:41,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2024-09-12 22:10:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 781. [2024-09-12 22:10:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 776 states have (on average 1.4884020618556701) internal successors, (1155), 776 states have internal predecessors, (1155), 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) [2024-09-12 22:10:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1159 transitions. [2024-09-12 22:10:42,101 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1159 transitions. Word has length 38 [2024-09-12 22:10:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:42,101 INFO L474 AbstractCegarLoop]: Abstraction has 781 states and 1159 transitions. [2024-09-12 22:10:42,101 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:42,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1159 transitions. [2024-09-12 22:10:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 22:10:42,103 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:42,103 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:42,120 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-12 22:10:42,303 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-12 22:10:42,304 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:42,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:42,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1178248642, now seen corresponding path program 13 times [2024-09-12 22:10:42,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:42,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215814266] [2024-09-12 22:10:42,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:42,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:42,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-12 22:10:42,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:42,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215814266] [2024-09-12 22:10:42,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215814266] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:42,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443738876] [2024-09-12 22:10:42,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:10:42,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:42,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:42,506 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) [2024-09-12 22:10:42,508 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-12 22:10:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:42,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 22:10:42,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-12 22:10:42,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 22:10:42,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443738876] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:42,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:42,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 30 [2024-09-12 22:10:42,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982001911] [2024-09-12 22:10:42,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:42,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 22:10:42,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:42,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 22:10:42,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-09-12 22:10:42,890 INFO L87 Difference]: Start difference. First operand 781 states and 1159 transitions. Second operand has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 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) [2024-09-12 22:10:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:45,112 INFO L93 Difference]: Finished difference Result 1202 states and 1667 transitions. [2024-09-12 22:10:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-09-12 22:10:45,113 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 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 39 [2024-09-12 22:10:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:45,117 INFO L225 Difference]: With dead ends: 1202 [2024-09-12 22:10:45,117 INFO L226 Difference]: Without dead ends: 1080 [2024-09-12 22:10:45,118 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=413, Invalid=3009, Unknown=0, NotChecked=0, Total=3422 [2024-09-12 22:10:45,118 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 103 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:45,119 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 762 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 22:10:45,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2024-09-12 22:10:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 753. [2024-09-12 22:10:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 748 states have (on average 1.4705882352941178) internal successors, (1100), 748 states have internal predecessors, (1100), 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) [2024-09-12 22:10:45,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1104 transitions. [2024-09-12 22:10:45,745 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1104 transitions. Word has length 39 [2024-09-12 22:10:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:45,745 INFO L474 AbstractCegarLoop]: Abstraction has 753 states and 1104 transitions. [2024-09-12 22:10:45,745 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5) internal successors, (45), 30 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) [2024-09-12 22:10:45,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1104 transitions. [2024-09-12 22:10:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 22:10:45,747 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:45,747 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:45,761 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-12 22:10:45,950 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:45,951 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:45,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:45,951 INFO L85 PathProgramCache]: Analyzing trace with hash -958108414, now seen corresponding path program 14 times [2024-09-12 22:10:45,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:45,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318936870] [2024-09-12 22:10:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:45,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:46,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:10:46,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:46,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318936870] [2024-09-12 22:10:46,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318936870] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:46,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550653109] [2024-09-12 22:10:46,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:10:46,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:46,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:46,611 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) [2024-09-12 22:10:46,611 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-12 22:10:46,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:10:46,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:46,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-12 22:10:46,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:10:46,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:10:46,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550653109] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:46,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:46,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 28 [2024-09-12 22:10:46,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736209529] [2024-09-12 22:10:46,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:46,989 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 22:10:46,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:46,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 22:10:46,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2024-09-12 22:10:46,990 INFO L87 Difference]: Start difference. First operand 753 states and 1104 transitions. Second operand has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 26 states have internal predecessors, (88), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:47,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:10:47,783 INFO L93 Difference]: Finished difference Result 770 states and 1120 transitions. [2024-09-12 22:10:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 22:10:47,783 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 26 states have internal predecessors, (88), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-12 22:10:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:10:47,786 INFO L225 Difference]: With dead ends: 770 [2024-09-12 22:10:47,786 INFO L226 Difference]: Without dead ends: 740 [2024-09-12 22:10:47,787 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2024-09-12 22:10:47,787 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:10:47,787 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 188 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:10:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2024-09-12 22:10:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 740. [2024-09-12 22:10:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 735 states have (on average 1.4775510204081632) internal successors, (1086), 735 states have internal predecessors, (1086), 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) [2024-09-12 22:10:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1090 transitions. [2024-09-12 22:10:48,449 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1090 transitions. Word has length 40 [2024-09-12 22:10:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:10:48,450 INFO L474 AbstractCegarLoop]: Abstraction has 740 states and 1090 transitions. [2024-09-12 22:10:48,450 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 26 states have internal predecessors, (88), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:10:48,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1090 transitions. [2024-09-12 22:10:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 22:10:48,451 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:10:48,451 INFO L216 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:10:48,465 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-12 22:10:48,652 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:48,652 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:10:48,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:10:48,652 INFO L85 PathProgramCache]: Analyzing trace with hash -971466802, now seen corresponding path program 15 times [2024-09-12 22:10:48,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:10:48,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227811972] [2024-09-12 22:10:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:10:48,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:10:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:48,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:10:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:10:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 22:10:48,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:10:48,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227811972] [2024-09-12 22:10:48,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227811972] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:10:48,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124097678] [2024-09-12 22:10:48,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:10:48,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:10:48,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:10:48,945 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) [2024-09-12 22:10:48,946 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-12 22:10:49,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-12 22:10:49,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:10:49,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 22:10:49,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:10:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:10:49,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:10:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 22:10:49,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124097678] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:10:49,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:10:49,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-09-12 22:10:49,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43334895] [2024-09-12 22:10:49,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:10:49,587 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-12 22:10:49,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:10:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-12 22:10:49,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2024-09-12 22:10:49,588 INFO L87 Difference]: Start difference. First operand 740 states and 1090 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:11:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:11:36,258 INFO L93 Difference]: Finished difference Result 2703 states and 3973 transitions. [2024-09-12 22:11:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2024-09-12 22:11:36,258 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 2 states have call successors, (3), 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 [2024-09-12 22:11:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:11:36,265 INFO L225 Difference]: With dead ends: 2703 [2024-09-12 22:11:36,265 INFO L226 Difference]: Without dead ends: 2417 [2024-09-12 22:11:36,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45119 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=21007, Invalid=84943, Unknown=0, NotChecked=0, Total=105950 [2024-09-12 22:11:36,271 INFO L434 NwaCegarLoop]: 94 mSDtfsCounter, 2450 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2450 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-09-12 22:11:36,271 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2450 Valid, 1644 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1117 Valid, 1896 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-09-12 22:11:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2024-09-12 22:11:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 878. [2024-09-12 22:11:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 873 states have (on average 1.4490263459335624) internal successors, (1265), 873 states have internal predecessors, (1265), 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) [2024-09-12 22:11:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1269 transitions. [2024-09-12 22:11:37,117 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1269 transitions. Word has length 41 [2024-09-12 22:11:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:11:37,117 INFO L474 AbstractCegarLoop]: Abstraction has 878 states and 1269 transitions. [2024-09-12 22:11:37,117 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:11:37,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1269 transitions. [2024-09-12 22:11:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 22:11:37,118 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:11:37,118 INFO L216 NwaCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:11:37,132 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-12 22:11:37,319 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:37,319 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:11:37,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:11:37,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1510494176, now seen corresponding path program 4 times [2024-09-12 22:11:37,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:11:37,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833053353] [2024-09-12 22:11:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:11:37,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:11:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:37,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:11:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:11:37,840 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:11:37,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:11:37,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833053353] [2024-09-12 22:11:37,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833053353] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:11:37,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262645402] [2024-09-12 22:11:37,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:11:37,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:11:37,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:11:37,842 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) [2024-09-12 22:11:37,843 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-12 22:11:37,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:11:37,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:11:37,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 22:11:37,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:11:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:11:37,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:11:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:11:39,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262645402] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:11:39,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:11:39,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2024-09-12 22:11:39,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231629419] [2024-09-12 22:11:39,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:11:39,121 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-12 22:11:39,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:11:39,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-12 22:11:39,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=2755, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 22:11:39,122 INFO L87 Difference]: Start difference. First operand 878 states and 1269 transitions. Second operand has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:40,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:40,706 INFO L93 Difference]: Finished difference Result 6234 states and 10458 transitions. [2024-09-12 22:12:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2024-09-12 22:12:40,706 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-12 22:12:40,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:40,725 INFO L225 Difference]: With dead ends: 6234 [2024-09-12 22:12:40,725 INFO L226 Difference]: Without dead ends: 5994 [2024-09-12 22:12:40,727 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7379 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=8476, Invalid=18584, Unknown=0, NotChecked=0, Total=27060 [2024-09-12 22:12:40,728 INFO L434 NwaCegarLoop]: 163 mSDtfsCounter, 5222 mSDsluCounter, 4595 mSDsCounter, 0 mSdLazyCounter, 3917 mSolverCounterSat, 2043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5222 SdHoareTripleChecker+Valid, 4758 SdHoareTripleChecker+Invalid, 5960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2043 IncrementalHoareTripleChecker+Valid, 3917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:40,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5222 Valid, 4758 Invalid, 5960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2043 Valid, 3917 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2024-09-12 22:12:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5994 states. [2024-09-12 22:12:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5994 to 1180. [2024-09-12 22:12:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1175 states have (on average 1.446808510638298) internal successors, (1700), 1175 states have internal predecessors, (1700), 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) [2024-09-12 22:12:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1704 transitions. [2024-09-12 22:12:42,349 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1704 transitions. Word has length 42 [2024-09-12 22:12:42,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:42,350 INFO L474 AbstractCegarLoop]: Abstraction has 1180 states and 1704 transitions. [2024-09-12 22:12:42,350 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:42,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:42,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1704 transitions. [2024-09-12 22:12:42,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 22:12:42,352 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:42,352 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:42,370 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-12 22:12:42,553 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-12 22:12:42,553 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:42,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1307540124, now seen corresponding path program 16 times [2024-09-12 22:12:42,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:42,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356767583] [2024-09-12 22:12:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:42,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:42,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-12 22:12:42,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:42,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356767583] [2024-09-12 22:12:42,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356767583] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:42,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086805115] [2024-09-12 22:12:42,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:12:42,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:42,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:42,873 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) [2024-09-12 22:12:42,874 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-12 22:12:42,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:12:42,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:42,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 22:12:42,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-12 22:12:43,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-12 22:12:43,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086805115] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:43,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:43,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2024-09-12 22:12:43,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508492290] [2024-09-12 22:12:43,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:43,451 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-12 22:12:43,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:43,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-12 22:12:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2024-09-12 22:12:43,452 INFO L87 Difference]: Start difference. First operand 1180 states and 1704 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:50,553 INFO L93 Difference]: Finished difference Result 1666 states and 2298 transitions. [2024-09-12 22:12:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-09-12 22:12:50,554 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-12 22:12:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:50,560 INFO L225 Difference]: With dead ends: 1666 [2024-09-12 22:12:50,560 INFO L226 Difference]: Without dead ends: 1590 [2024-09-12 22:12:50,561 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 76 SyntacticMatches, 14 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6310 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1334, Invalid=18126, Unknown=0, NotChecked=0, Total=19460 [2024-09-12 22:12:50,562 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 170 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 2347 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 2596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:50,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 562 Invalid, 2596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2347 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-12 22:12:50,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2024-09-12 22:12:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1276. [2024-09-12 22:12:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1271 states have (on average 1.4225019669551535) internal successors, (1808), 1271 states have internal predecessors, (1808), 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) [2024-09-12 22:12:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1812 transitions. [2024-09-12 22:12:52,491 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1812 transitions. Word has length 43 [2024-09-12 22:12:52,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:12:52,491 INFO L474 AbstractCegarLoop]: Abstraction has 1276 states and 1812 transitions. [2024-09-12 22:12:52,491 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:12:52,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:52,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1812 transitions. [2024-09-12 22:12:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 22:12:52,493 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:12:52,493 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:12:52,507 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-12 22:12:52,693 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-12 22:12:52,694 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:12:52,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:12:52,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1078805612, now seen corresponding path program 17 times [2024-09-12 22:12:52,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:12:52,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161073462] [2024-09-12 22:12:52,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:12:52,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:12:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:52,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:12:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:12:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-12 22:12:52,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:12:52,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161073462] [2024-09-12 22:12:52,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161073462] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:12:52,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67564587] [2024-09-12 22:12:52,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:12:52,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:12:52,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:12:52,924 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) [2024-09-12 22:12:52,925 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-12 22:12:53,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 22:12:53,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:12:53,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-12 22:12:53,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:12:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-12 22:12:53,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:12:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 22:12:53,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67564587] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:12:53,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:12:53,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 14] total 35 [2024-09-12 22:12:53,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743096639] [2024-09-12 22:12:53,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:12:53,479 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-12 22:12:53,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:12:53,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-12 22:12:53,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 22:12:53,480 INFO L87 Difference]: Start difference. First operand 1276 states and 1812 transitions. Second operand has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 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) [2024-09-12 22:12:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:12:58,697 INFO L93 Difference]: Finished difference Result 1880 states and 2520 transitions. [2024-09-12 22:12:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-09-12 22:12:58,698 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 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 43 [2024-09-12 22:12:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:12:58,703 INFO L225 Difference]: With dead ends: 1880 [2024-09-12 22:12:58,703 INFO L226 Difference]: Without dead ends: 1649 [2024-09-12 22:12:58,704 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=521, Invalid=4035, Unknown=0, NotChecked=0, Total=4556 [2024-09-12 22:12:58,705 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 125 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:12:58,705 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 918 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 22:12:58,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2024-09-12 22:13:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1184. [2024-09-12 22:13:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1179 states have (on average 1.4215436810856659) internal successors, (1676), 1179 states have internal predecessors, (1676), 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) [2024-09-12 22:13:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1680 transitions. [2024-09-12 22:13:00,391 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1680 transitions. Word has length 43 [2024-09-12 22:13:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:00,391 INFO L474 AbstractCegarLoop]: Abstraction has 1184 states and 1680 transitions. [2024-09-12 22:13:00,392 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 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) [2024-09-12 22:13:00,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1680 transitions. [2024-09-12 22:13:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 22:13:00,393 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:00,393 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:00,405 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-12 22:13:00,593 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-12 22:13:00,594 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:00,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:00,594 INFO L85 PathProgramCache]: Analyzing trace with hash 227123308, now seen corresponding path program 18 times [2024-09-12 22:13:00,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:00,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820473856] [2024-09-12 22:13:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:00,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:01,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:13:01,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:01,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820473856] [2024-09-12 22:13:01,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820473856] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:01,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153614655] [2024-09-12 22:13:01,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:13:01,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:01,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:01,263 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) [2024-09-12 22:13:01,264 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-12 22:13:01,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 22:13:01,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:01,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-12 22:13:01,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:13:01,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:13:01,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153614655] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:01,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:01,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 32 [2024-09-12 22:13:01,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813279724] [2024-09-12 22:13:01,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:01,832 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 22:13:01,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:01,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 22:13:01,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2024-09-12 22:13:01,833 INFO L87 Difference]: Start difference. First operand 1184 states and 1680 transitions. Second operand has 32 states, 32 states have (on average 3.125) internal successors, (100), 30 states have internal predecessors, (100), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:05,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:13:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:07,775 INFO L93 Difference]: Finished difference Result 1203 states and 1699 transitions. [2024-09-12 22:13:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 22:13:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 30 states have internal predecessors, (100), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-12 22:13:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:07,780 INFO L225 Difference]: With dead ends: 1203 [2024-09-12 22:13:07,780 INFO L226 Difference]: Without dead ends: 1191 [2024-09-12 22:13:07,781 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 22:13:07,781 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:07,781 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 177 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 459 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-09-12 22:13:07,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2024-09-12 22:13:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1185. [2024-09-12 22:13:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1180 states have (on average 1.4211864406779662) internal successors, (1677), 1180 states have internal predecessors, (1677), 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) [2024-09-12 22:13:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1681 transitions. [2024-09-12 22:13:09,437 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1681 transitions. Word has length 45 [2024-09-12 22:13:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:09,437 INFO L474 AbstractCegarLoop]: Abstraction has 1185 states and 1681 transitions. [2024-09-12 22:13:09,437 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.125) internal successors, (100), 30 states have internal predecessors, (100), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:09,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1681 transitions. [2024-09-12 22:13:09,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 22:13:09,439 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:09,439 INFO L216 NwaCegarLoop]: trace histogram [12, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:09,457 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-12 22:13:09,639 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-12 22:13:09,640 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:09,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:09,640 INFO L85 PathProgramCache]: Analyzing trace with hash 111966764, now seen corresponding path program 4 times [2024-09-12 22:13:09,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:09,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154457595] [2024-09-12 22:13:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:09,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:09,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-12 22:13:09,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:09,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154457595] [2024-09-12 22:13:09,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154457595] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:09,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795951241] [2024-09-12 22:13:09,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:13:09,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:09,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:09,907 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) [2024-09-12 22:13:09,908 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-12 22:13:09,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:13:09,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:09,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-12 22:13:09,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:13:10,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 42 proven. 54 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-12 22:13:10,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795951241] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:10,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:10,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 11] total 33 [2024-09-12 22:13:10,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237958593] [2024-09-12 22:13:10,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:10,354 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-12 22:13:10,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-12 22:13:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-09-12 22:13:10,355 INFO L87 Difference]: Start difference. First operand 1185 states and 1681 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:18,366 INFO L93 Difference]: Finished difference Result 2256 states and 2826 transitions. [2024-09-12 22:13:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-09-12 22:13:18,367 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-12 22:13:18,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:18,372 INFO L225 Difference]: With dead ends: 2256 [2024-09-12 22:13:18,372 INFO L226 Difference]: Without dead ends: 2195 [2024-09-12 22:13:18,373 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3682 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2559, Invalid=10551, Unknown=0, NotChecked=0, Total=13110 [2024-09-12 22:13:18,374 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 506 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 2382 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:18,374 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 506 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2382 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 22:13:18,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2024-09-12 22:13:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1209. [2024-09-12 22:13:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1204 states have (on average 1.415282392026578) internal successors, (1704), 1204 states have internal predecessors, (1704), 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) [2024-09-12 22:13:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1708 transitions. [2024-09-12 22:13:20,185 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1708 transitions. Word has length 45 [2024-09-12 22:13:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:20,185 INFO L474 AbstractCegarLoop]: Abstraction has 1209 states and 1708 transitions. [2024-09-12 22:13:20,185 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:20,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1708 transitions. [2024-09-12 22:13:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 22:13:20,187 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:20,187 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:20,204 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-12 22:13:20,387 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-12 22:13:20,388 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:20,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash 516511681, now seen corresponding path program 19 times [2024-09-12 22:13:20,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:20,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268489122] [2024-09-12 22:13:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:20,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:20,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-12 22:13:20,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:20,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268489122] [2024-09-12 22:13:20,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268489122] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:20,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782142515] [2024-09-12 22:13:20,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:13:20,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:20,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:20,578 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) [2024-09-12 22:13:20,579 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-12 22:13:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:20,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 22:13:20,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-12 22:13:20,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-12 22:13:20,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782142515] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:20,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:20,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2024-09-12 22:13:20,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551964801] [2024-09-12 22:13:20,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:20,849 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 22:13:20,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:20,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 22:13:20,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-09-12 22:13:20,850 INFO L87 Difference]: Start difference. First operand 1209 states and 1708 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:25,931 INFO L93 Difference]: Finished difference Result 2011 states and 2723 transitions. [2024-09-12 22:13:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-12 22:13:25,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-12 22:13:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:25,936 INFO L225 Difference]: With dead ends: 2011 [2024-09-12 22:13:25,936 INFO L226 Difference]: Without dead ends: 1959 [2024-09-12 22:13:25,936 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=521, Invalid=1459, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 22:13:25,936 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 174 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:25,936 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 419 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:13:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2024-09-12 22:13:28,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1466. [2024-09-12 22:13:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1461 states have (on average 1.3990417522245038) internal successors, (2044), 1461 states have internal predecessors, (2044), 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) [2024-09-12 22:13:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 2048 transitions. [2024-09-12 22:13:28,581 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 2048 transitions. Word has length 46 [2024-09-12 22:13:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:28,581 INFO L474 AbstractCegarLoop]: Abstraction has 1466 states and 2048 transitions. [2024-09-12 22:13:28,582 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:28,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 2048 transitions. [2024-09-12 22:13:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 22:13:28,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:28,584 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:28,601 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-12 22:13:28,784 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-12 22:13:28,784 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:28,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:28,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2013420162, now seen corresponding path program 20 times [2024-09-12 22:13:28,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:28,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697994834] [2024-09-12 22:13:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:28,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:29,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-12 22:13:29,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:29,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697994834] [2024-09-12 22:13:29,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697994834] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:29,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856609544] [2024-09-12 22:13:29,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:13:29,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:29,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:29,020 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) [2024-09-12 22:13:29,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-12 22:13:29,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:13:29,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:29,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-12 22:13:29,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-12 22:13:29,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-12 22:13:29,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856609544] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:29,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:29,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 16] total 40 [2024-09-12 22:13:29,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877046162] [2024-09-12 22:13:29,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:29,587 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 22:13:29,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 22:13:29,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 22:13:29,588 INFO L87 Difference]: Start difference. First operand 1466 states and 2048 transitions. Second operand has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:13:36,517 INFO L93 Difference]: Finished difference Result 2141 states and 2853 transitions. [2024-09-12 22:13:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-09-12 22:13:36,517 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 2 states have call successors, (3), 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 [2024-09-12 22:13:36,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:13:36,522 INFO L225 Difference]: With dead ends: 2141 [2024-09-12 22:13:36,522 INFO L226 Difference]: Without dead ends: 1844 [2024-09-12 22:13:36,523 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=642, Invalid=5210, Unknown=0, NotChecked=0, Total=5852 [2024-09-12 22:13:36,524 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 138 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 22:13:36,524 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1248 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1929 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 22:13:36,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2024-09-12 22:13:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1364. [2024-09-12 22:13:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1359 states have (on average 1.3988226637233259) internal successors, (1901), 1359 states have internal predecessors, (1901), 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) [2024-09-12 22:13:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 1905 transitions. [2024-09-12 22:13:38,933 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 1905 transitions. Word has length 47 [2024-09-12 22:13:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:13:38,933 INFO L474 AbstractCegarLoop]: Abstraction has 1364 states and 1905 transitions. [2024-09-12 22:13:38,934 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:13:38,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:38,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 1905 transitions. [2024-09-12 22:13:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 22:13:38,935 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:13:38,935 INFO L216 NwaCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:13:38,951 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-12 22:13:39,135 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-12 22:13:39,136 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:13:39,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:13:39,136 INFO L85 PathProgramCache]: Analyzing trace with hash 4872078, now seen corresponding path program 21 times [2024-09-12 22:13:39,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:13:39,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45822696] [2024-09-12 22:13:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:13:39,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:13:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:39,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:13:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:13:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:13:39,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:13:39,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45822696] [2024-09-12 22:13:39,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45822696] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:13:39,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749017089] [2024-09-12 22:13:39,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:13:39,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:13:39,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:13:39,649 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) [2024-09-12 22:13:39,650 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-12 22:13:39,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-12 22:13:39,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:13:39,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-12 22:13:39,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:13:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:13:39,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:13:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 22:13:41,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749017089] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:13:41,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:13:41,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2024-09-12 22:13:41,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771990410] [2024-09-12 22:13:41,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:13:41,058 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-12 22:13:41,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:13:41,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-12 22:13:41,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=974, Invalid=3186, Unknown=0, NotChecked=0, Total=4160 [2024-09-12 22:13:41,060 INFO L87 Difference]: Start difference. First operand 1364 states and 1905 transitions. Second operand has 65 states, 65 states have (on average 1.2) internal successors, (78), 65 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) [2024-09-12 22:16:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:16:19,438 INFO L93 Difference]: Finished difference Result 6382 states and 9961 transitions. [2024-09-12 22:16:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2024-09-12 22:16:19,439 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.2) internal successors, (78), 65 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 47 [2024-09-12 22:16:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:16:19,447 INFO L225 Difference]: With dead ends: 6382 [2024-09-12 22:16:19,447 INFO L226 Difference]: Without dead ends: 6054 [2024-09-12 22:16:19,451 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37645 ImplicationChecksByTransitivity, 122.4s TimeCoverageRelationStatistics Valid=25578, Invalid=66534, Unknown=0, NotChecked=0, Total=92112 [2024-09-12 22:16:19,451 INFO L434 NwaCegarLoop]: 172 mSDtfsCounter, 6942 mSDsluCounter, 4968 mSDsCounter, 0 mSdLazyCounter, 4517 mSolverCounterSat, 3180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6942 SdHoareTripleChecker+Valid, 5140 SdHoareTripleChecker+Invalid, 7697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3180 IncrementalHoareTripleChecker+Valid, 4517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:16:19,452 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6942 Valid, 5140 Invalid, 7697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3180 Valid, 4517 Invalid, 0 Unknown, 0 Unchecked, 24.7s Time] [2024-09-12 22:16:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2024-09-12 22:16:22,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 1385. [2024-09-12 22:16:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1380 states have (on average 1.3971014492753624) internal successors, (1928), 1380 states have internal predecessors, (1928), 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) [2024-09-12 22:16:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 1932 transitions. [2024-09-12 22:16:22,056 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 1932 transitions. Word has length 47 [2024-09-12 22:16:22,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:16:22,056 INFO L474 AbstractCegarLoop]: Abstraction has 1385 states and 1932 transitions. [2024-09-12 22:16:22,056 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.2) internal successors, (78), 65 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) [2024-09-12 22:16:22,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:16:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 1932 transitions. [2024-09-12 22:16:22,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 22:16:22,058 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:16:22,058 INFO L216 NwaCegarLoop]: trace histogram [14, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:16:22,070 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-12 22:16:22,258 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-12 22:16:22,258 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:16:22,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:16:22,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1486861470, now seen corresponding path program 5 times [2024-09-12 22:16:22,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:16:22,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209652511] [2024-09-12 22:16:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:16:22,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:16:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:16:22,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:16:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:16:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 22:16:22,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:16:22,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209652511] [2024-09-12 22:16:22,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209652511] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:16:22,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443629204] [2024-09-12 22:16:22,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:16:22,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:16:22,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:16:22,597 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) [2024-09-12 22:16:22,598 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-12 22:16:23,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-12 22:16:23,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:16:23,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-12 22:16:23,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:16:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 22:16:23,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:16:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 50 proven. 90 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 22:16:23,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443629204] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:16:23,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:16:23,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 52 [2024-09-12 22:16:23,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454164483] [2024-09-12 22:16:23,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:16:23,901 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-12 22:16:23,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:16:23,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-12 22:16:23,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2231, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 22:16:23,902 INFO L87 Difference]: Start difference. First operand 1385 states and 1932 transitions. Second operand has 52 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:16:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:16:43,682 INFO L93 Difference]: Finished difference Result 3038 states and 3869 transitions. [2024-09-12 22:16:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2024-09-12 22:16:43,683 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 states have internal predecessors, (70), 2 states have call successors, (3), 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 49 [2024-09-12 22:16:43,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:16:43,687 INFO L225 Difference]: With dead ends: 3038 [2024-09-12 22:16:43,687 INFO L226 Difference]: Without dead ends: 2976 [2024-09-12 22:16:43,690 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23286 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=8569, Invalid=55187, Unknown=0, NotChecked=0, Total=63756 [2024-09-12 22:16:43,691 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 1050 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 3899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-12 22:16:43,691 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 715 Invalid, 3899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1117 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-12 22:16:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2024-09-12 22:16:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 1416. [2024-09-12 22:16:46,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1411 states have (on average 1.3905031892274982) internal successors, (1962), 1411 states have internal predecessors, (1962), 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) [2024-09-12 22:16:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 1966 transitions. [2024-09-12 22:16:46,503 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 1966 transitions. Word has length 49 [2024-09-12 22:16:46,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:16:46,504 INFO L474 AbstractCegarLoop]: Abstraction has 1416 states and 1966 transitions. [2024-09-12 22:16:46,504 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:16:46,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:16:46,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 1966 transitions. [2024-09-12 22:16:46,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 22:16:46,505 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:16:46,505 INFO L216 NwaCegarLoop]: trace histogram [12, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:16:46,517 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-12 22:16:46,705 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:16:46,706 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:16:46,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:16:46,706 INFO L85 PathProgramCache]: Analyzing trace with hash -312456852, now seen corresponding path program 6 times [2024-09-12 22:16:46,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:16:46,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875710536] [2024-09-12 22:16:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:16:46,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:16:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:16:47,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:16:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:16:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 22 proven. 110 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-09-12 22:16:47,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:16:47,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875710536] [2024-09-12 22:16:47,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875710536] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:16:47,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838824363] [2024-09-12 22:16:47,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:16:47,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:16:47,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:16:47,007 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) [2024-09-12 22:16:47,008 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-12 22:16:47,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 22:16:47,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:16:47,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-12 22:16:47,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:16:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:16:47,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:16:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 40 proven. 86 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-09-12 22:16:47,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838824363] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:16:47,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:16:47,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 13] total 37 [2024-09-12 22:16:47,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047952510] [2024-09-12 22:16:47,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:16:47,609 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-12 22:16:47,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:16:47,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-12 22:16:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 22:16:47,610 INFO L87 Difference]: Start difference. First operand 1416 states and 1966 transitions. Second operand has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:17:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:17:00,393 INFO L93 Difference]: Finished difference Result 2717 states and 3366 transitions. [2024-09-12 22:17:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2024-09-12 22:17:00,393 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (3), 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 49 [2024-09-12 22:17:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:17:00,399 INFO L225 Difference]: With dead ends: 2717 [2024-09-12 22:17:00,399 INFO L226 Difference]: Without dead ends: 2611 [2024-09-12 22:17:00,400 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8017 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4752, Invalid=19740, Unknown=0, NotChecked=0, Total=24492 [2024-09-12 22:17:00,401 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 613 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 4038 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 4310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 4038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-12 22:17:00,401 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 716 Invalid, 4310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 4038 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-12 22:17:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2024-09-12 22:17:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 1432. [2024-09-12 22:17:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1427 states have (on average 1.3805185704274703) internal successors, (1970), 1427 states have internal predecessors, (1970), 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) [2024-09-12 22:17:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 1974 transitions. [2024-09-12 22:17:03,282 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 1974 transitions. Word has length 49 [2024-09-12 22:17:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:17:03,283 INFO L474 AbstractCegarLoop]: Abstraction has 1432 states and 1974 transitions. [2024-09-12 22:17:03,283 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 37 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:17:03,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 1974 transitions. [2024-09-12 22:17:03,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 22:17:03,285 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:17:03,285 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:17:03,302 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-12 22:17:03,485 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:17:03,486 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:17:03,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash 847388738, now seen corresponding path program 22 times [2024-09-12 22:17:03,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:17:03,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105331390] [2024-09-12 22:17:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:17:03,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:17:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:04,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:17:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 22:17:04,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:17:04,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105331390] [2024-09-12 22:17:04,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105331390] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:17:04,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512580035] [2024-09-12 22:17:04,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:17:04,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:17:04,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:17:04,321 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) [2024-09-12 22:17:04,321 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-12 22:17:04,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:17:04,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:17:04,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-12 22:17:04,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:17:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 22:17:04,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:17:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-12 22:17:04,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512580035] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:17:04,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:17:04,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 36 [2024-09-12 22:17:04,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592835296] [2024-09-12 22:17:04,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:17:04,830 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 22:17:04,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:17:04,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 22:17:04,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 22:17:04,831 INFO L87 Difference]: Start difference. First operand 1432 states and 1974 transitions. Second operand has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 34 states have internal predecessors, (112), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:17:08,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 22:17:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:17:11,926 INFO L93 Difference]: Finished difference Result 1446 states and 1988 transitions. [2024-09-12 22:17:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 22:17:11,926 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 34 states have internal predecessors, (112), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2024-09-12 22:17:11,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:17:11,930 INFO L225 Difference]: With dead ends: 1446 [2024-09-12 22:17:11,930 INFO L226 Difference]: Without dead ends: 1433 [2024-09-12 22:17:11,930 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 22:17:11,931 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:17:11,931 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 155 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 461 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-09-12 22:17:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2024-09-12 22:17:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1433. [2024-09-12 22:17:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1428 states have (on average 1.3802521008403361) internal successors, (1971), 1428 states have internal predecessors, (1971), 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) [2024-09-12 22:17:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1975 transitions. [2024-09-12 22:17:14,785 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1975 transitions. Word has length 50 [2024-09-12 22:17:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:17:14,785 INFO L474 AbstractCegarLoop]: Abstraction has 1433 states and 1975 transitions. [2024-09-12 22:17:14,786 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 34 states have internal predecessors, (112), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:17:14,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1975 transitions. [2024-09-12 22:17:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 22:17:14,787 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:17:14,787 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:17:14,799 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-09-12 22:17:14,988 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:17:14,988 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:17:14,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash -957060563, now seen corresponding path program 23 times [2024-09-12 22:17:14,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:17:14,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943186533] [2024-09-12 22:17:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:17:14,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:17:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:15,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:17:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 22:17:15,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:17:15,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943186533] [2024-09-12 22:17:15,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943186533] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:17:15,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141920664] [2024-09-12 22:17:15,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:17:15,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:17:15,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:17:15,194 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) [2024-09-12 22:17:15,196 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-12 22:17:15,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 22:17:15,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:17:15,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 22:17:15,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:17:15,438 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 22:17:15,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:17:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-12 22:17:15,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141920664] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:17:15,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:17:15,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2024-09-12 22:17:15,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640896569] [2024-09-12 22:17:15,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:17:15,558 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 22:17:15,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:17:15,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 22:17:15,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:17:15,558 INFO L87 Difference]: Start difference. First operand 1433 states and 1975 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:17:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:17:19,009 INFO L93 Difference]: Finished difference Result 1612 states and 2185 transitions. [2024-09-12 22:17:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 22:17:19,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-12 22:17:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:17:19,013 INFO L225 Difference]: With dead ends: 1612 [2024-09-12 22:17:19,013 INFO L226 Difference]: Without dead ends: 1557 [2024-09-12 22:17:19,014 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 19 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-12 22:17:19,014 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 29 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:17:19,014 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 397 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:17:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2024-09-12 22:17:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1463. [2024-09-12 22:17:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1458 states have (on average 1.3710562414266119) internal successors, (1999), 1458 states have internal predecessors, (1999), 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) [2024-09-12 22:17:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 2003 transitions. [2024-09-12 22:17:22,043 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 2003 transitions. Word has length 51 [2024-09-12 22:17:22,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:17:22,044 INFO L474 AbstractCegarLoop]: Abstraction has 1463 states and 2003 transitions. [2024-09-12 22:17:22,044 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:17:22,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:22,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 2003 transitions. [2024-09-12 22:17:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 22:17:22,046 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:17:22,046 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:17:22,064 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-12 22:17:22,247 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-12 22:17:22,248 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:17:22,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:17:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2094410498, now seen corresponding path program 7 times [2024-09-12 22:17:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:17:22,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797928743] [2024-09-12 22:17:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:17:22,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:17:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:22,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:17:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-12 22:17:22,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:17:22,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797928743] [2024-09-12 22:17:22,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797928743] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:17:22,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097894570] [2024-09-12 22:17:22,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:17:22,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:17:22,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:17:22,717 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) [2024-09-12 22:17:22,719 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-12 22:17:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:17:22,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 22:17:22,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:17:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-12 22:17:22,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:17:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-12 22:17:23,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097894570] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:17:23,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:17:23,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 52 [2024-09-12 22:17:23,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508908233] [2024-09-12 22:17:23,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:17:23,615 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-12 22:17:23,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:17:23,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-12 22:17:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 22:17:23,615 INFO L87 Difference]: Start difference. First operand 1463 states and 2003 transitions. Second operand has 52 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Killed by 15