./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/count_by_nondet.i --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/loop-new/count_by_nondet.i -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 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d --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 21:44:50,391 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 21:44:50,423 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 21:44:50,426 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 21:44:50,426 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 21:44:50,455 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 21:44:50,455 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 21:44:50,456 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 21:44:50,456 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 21:44:50,456 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 21:44:50,456 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 21:44:50,457 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 21:44:50,457 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 21:44:50,457 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 21:44:50,457 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 21:44:50,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 21:44:50,465 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 21:44:50,465 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 21:44:50,465 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 21:44:50,465 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 21:44:50,466 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 21:44:50,468 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 21:44:50,468 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 21:44:50,469 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 21:44:50,469 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 21:44:50,469 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 21:44:50,469 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 21:44:50,469 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 21:44:50,470 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 21:44:50,470 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 21:44:50,470 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 21:44:50,470 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 21:44:50,470 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 21:44:50,471 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 21:44:50,471 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 21:44:50,471 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 21:44:50,471 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 21:44:50,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 21:44:50,471 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 21:44:50,472 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 21:44:50,472 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 21:44:50,474 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 21:44:50,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 21:44:50,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 21:44:50,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 21:44:50,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 21:44:50,671 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 21:44:50,671 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 21:44:50,672 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-new/count_by_nondet.i [2024-09-12 21:44:51,864 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 21:44:51,995 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 21:44:51,995 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-new/count_by_nondet.i [2024-09-12 21:44:52,001 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/d90eb24c7/c488c2ad35e74790b58d76b4bf33a87a/FLAGc10b87fa4 [2024-09-12 21:44:52,417 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/d90eb24c7/c488c2ad35e74790b58d76b4bf33a87a [2024-09-12 21:44:52,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 21:44:52,421 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 21:44:52,423 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 21:44:52,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 21:44:52,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 21:44:52,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700c4493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52, skipping insertion in model container [2024-09-12 21:44:52,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,444 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 21:44:52,554 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/loop-new/count_by_nondet.i[891,904] [2024-09-12 21:44:52,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 21:44:52,568 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 21:44:52,576 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/loop-new/count_by_nondet.i[891,904] [2024-09-12 21:44:52,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 21:44:52,589 INFO L204 MainTranslator]: Completed translation [2024-09-12 21:44:52,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52 WrapperNode [2024-09-12 21:44:52,589 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 21:44:52,590 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 21:44:52,590 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 21:44:52,590 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 21:44:52,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,599 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,603 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 21:44:52,603 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 21:44:52,604 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 21:44:52,604 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 21:44:52,604 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 21:44:52,610 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,611 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,619 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 21:44:52,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,620 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,622 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,623 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,623 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,624 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 21:44:52,625 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 21:44:52,625 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 21:44:52,625 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 21:44:52,625 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (1/1) ... [2024-09-12 21:44:52,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 21:44:52,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:44:52,649 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 21:44:52,651 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 21:44:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 21:44:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 21:44:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 21:44:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 21:44:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 21:44:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 21:44:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 21:44:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 21:44:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 21:44:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 21:44:52,730 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 21:44:52,732 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 21:44:52,808 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-12 21:44:52,808 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 21:44:52,823 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 21:44:52,825 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 21:44:52,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 09:44:52 BoogieIcfgContainer [2024-09-12 21:44:52,826 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 21:44:52,828 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 21:44:52,828 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 21:44:52,831 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 21:44:52,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 09:44:52" (1/3) ... [2024-09-12 21:44:52,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5893d8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 09:44:52, skipping insertion in model container [2024-09-12 21:44:52,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 09:44:52" (2/3) ... [2024-09-12 21:44:52,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5893d8f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 09:44:52, skipping insertion in model container [2024-09-12 21:44:52,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 09:44:52" (3/3) ... [2024-09-12 21:44:52,834 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2024-09-12 21:44:52,846 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 21:44:52,846 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 21:44:52,881 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 21:44:52,885 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;@31d7bc41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 21:44:52,885 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 21:44:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 21:44:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 21:44:52,892 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:44:52,892 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:44:52,893 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:44:52,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash 702528138, now seen corresponding path program 1 times [2024-09-12 21:44:52,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:44:52,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694370926] [2024-09-12 21:44:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:44:52,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:44:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:52,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:44:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:53,010 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 21:44:53,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:44:53,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694370926] [2024-09-12 21:44:53,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694370926] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 21:44:53,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 21:44:53,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 21:44:53,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832013585] [2024-09-12 21:44:53,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 21:44:53,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 21:44:53,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:44:53,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 21:44:53,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 21:44:53,039 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states 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 21:44:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:44:53,061 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-09-12 21:44:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 21:44:53,064 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 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 10 [2024-09-12 21:44:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:44:53,069 INFO L225 Difference]: With dead ends: 31 [2024-09-12 21:44:53,069 INFO L226 Difference]: Without dead ends: 12 [2024-09-12 21:44:53,071 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 21:44:53,074 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:44:53,074 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:44:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-12 21:44:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-12 21:44:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 21:44:53,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2024-09-12 21:44:53,102 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2024-09-12 21:44:53,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:44:53,103 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2024-09-12 21:44:53,103 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states 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 21:44:53,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2024-09-12 21:44:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 21:44:53,105 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:44:53,105 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:44:53,105 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 21:44:53,106 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:44:53,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:53,107 INFO L85 PathProgramCache]: Analyzing trace with hash 695139970, now seen corresponding path program 1 times [2024-09-12 21:44:53,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:44:53,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886973798] [2024-09-12 21:44:53,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:44:53,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:44:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:53,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:44:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:53,164 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 21:44:53,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:44:53,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886973798] [2024-09-12 21:44:53,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886973798] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 21:44:53,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 21:44:53,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 21:44:53,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808406039] [2024-09-12 21:44:53,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 21:44:53,167 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 21:44:53,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:44:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 21:44:53,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 21:44:53,168 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states 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 21:44:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:44:53,179 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2024-09-12 21:44:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 21:44:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 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 10 [2024-09-12 21:44:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:44:53,180 INFO L225 Difference]: With dead ends: 19 [2024-09-12 21:44:53,180 INFO L226 Difference]: Without dead ends: 14 [2024-09-12 21:44:53,180 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 21:44:53,181 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:44:53,182 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:44:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-12 21:44:53,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2024-09-12 21:44:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 21:44:53,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2024-09-12 21:44:53,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2024-09-12 21:44:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:44:53,185 INFO L474 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2024-09-12 21:44:53,185 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states 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 21:44:53,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2024-09-12 21:44:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-12 21:44:53,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:44:53,186 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:44:53,186 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 21:44:53,187 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:44:53,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash -851873154, now seen corresponding path program 1 times [2024-09-12 21:44:53,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:44:53,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169677970] [2024-09-12 21:44:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:44:53,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:44:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:53,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:44:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:53,282 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 21:44:53,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:44:53,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169677970] [2024-09-12 21:44:53,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169677970] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:44:53,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050375554] [2024-09-12 21:44:53,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:44:53,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:53,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:44:53,286 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 21:44:53,287 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 21:44:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:53,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 21:44:53,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:44:53,368 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 21:44:53,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:44:53,396 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 21:44:53,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050375554] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:44:53,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:44:53,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-12 21:44:53,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644373950] [2024-09-12 21:44:53,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:44:53,397 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 21:44:53,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:44:53,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 21:44:53,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-09-12 21:44:53,398 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 21:44:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:44:53,418 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2024-09-12 21:44:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 21:44:53,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 12 [2024-09-12 21:44:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:44:53,420 INFO L225 Difference]: With dead ends: 20 [2024-09-12 21:44:53,420 INFO L226 Difference]: Without dead ends: 15 [2024-09-12 21:44:53,421 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-09-12 21:44:53,422 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 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 21:44:53,422 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:44:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-12 21:44:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-12 21:44:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 21:44:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-09-12 21:44:53,428 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2024-09-12 21:44:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:44:53,428 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-09-12 21:44:53,428 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 21:44:53,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:53,429 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-09-12 21:44:53,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-12 21:44:53,429 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:44:53,429 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:44:53,441 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 21:44:53,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:53,630 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:44:53,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1472800902, now seen corresponding path program 2 times [2024-09-12 21:44:53,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:44:53,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732006914] [2024-09-12 21:44:53,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:44:53,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:44:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:53,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:44:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:53,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:44:53,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732006914] [2024-09-12 21:44:53,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732006914] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:44:53,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154862613] [2024-09-12 21:44:53,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 21:44:53,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:53,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:44:53,734 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 21:44:53,736 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 21:44:53,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 21:44:53,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:44:53,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 21:44:53,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:44:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:53,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:44:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:53,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154862613] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:44:53,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:44:53,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-12 21:44:53,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646690757] [2024-09-12 21:44:53,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:44:53,865 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 21:44:53,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:44:53,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 21:44:53,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-09-12 21:44:53,867 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 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 21:44:53,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:44:53,898 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-09-12 21:44:53,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 21:44:53,899 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 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 14 [2024-09-12 21:44:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:44:53,900 INFO L225 Difference]: With dead ends: 32 [2024-09-12 21:44:53,900 INFO L226 Difference]: Without dead ends: 24 [2024-09-12 21:44:53,900 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-09-12 21:44:53,901 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:44:53,901 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 65 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:44:53,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-12 21:44:53,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-09-12 21:44:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 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 21:44:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2024-09-12 21:44:53,905 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14 [2024-09-12 21:44:53,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:44:53,906 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2024-09-12 21:44:53,907 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 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 21:44:53,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2024-09-12 21:44:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 21:44:53,908 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:44:53,920 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:44:53,941 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 21:44:54,124 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:54,125 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:44:54,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:54,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2068523670, now seen corresponding path program 3 times [2024-09-12 21:44:54,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:44:54,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904111070] [2024-09-12 21:44:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:44:54,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:44:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:54,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:44:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:54,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:44:54,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904111070] [2024-09-12 21:44:54,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904111070] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:44:54,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244831760] [2024-09-12 21:44:54,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 21:44:54,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:54,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:44:54,322 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 21:44:54,323 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 21:44:54,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 21:44:54,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:44:54,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 21:44:54,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:44:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:54,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:44:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:54,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244831760] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:44:54,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:44:54,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-12 21:44:54,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014189312] [2024-09-12 21:44:54,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:44:54,529 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 21:44:54,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:44:54,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 21:44:54,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2024-09-12 21:44:54,530 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 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 21:44:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:44:54,594 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-09-12 21:44:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 21:44:54,595 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 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 22 [2024-09-12 21:44:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:44:54,596 INFO L225 Difference]: With dead ends: 52 [2024-09-12 21:44:54,596 INFO L226 Difference]: Without dead ends: 40 [2024-09-12 21:44:54,596 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2024-09-12 21:44:54,597 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:44:54,597 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 87 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:44:54,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-12 21:44:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-09-12 21:44:54,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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 21:44:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2024-09-12 21:44:54,603 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 22 [2024-09-12 21:44:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:44:54,603 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2024-09-12 21:44:54,603 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 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 21:44:54,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2024-09-12 21:44:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 21:44:54,604 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:44:54,604 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:44:54,616 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 21:44:54,804 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:54,804 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:44:54,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash -130940598, now seen corresponding path program 4 times [2024-09-12 21:44:54,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:44:54,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190158572] [2024-09-12 21:44:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:44:54,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:44:54,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:55,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:44:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:55,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:44:55,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190158572] [2024-09-12 21:44:55,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190158572] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:44:55,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940524901] [2024-09-12 21:44:55,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 21:44:55,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:55,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:44:55,100 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 21:44:55,100 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 21:44:55,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 21:44:55,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:44:55,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 21:44:55,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:44:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:55,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:44:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:55,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940524901] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:44:55,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:44:55,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-12 21:44:55,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844066203] [2024-09-12 21:44:55,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:44:55,568 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-12 21:44:55,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:44:55,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-12 21:44:55,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=794, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 21:44:55,569 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 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 21:44:55,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:44:55,630 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2024-09-12 21:44:55,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-12 21:44:55,631 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 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 38 [2024-09-12 21:44:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:44:55,632 INFO L225 Difference]: With dead ends: 92 [2024-09-12 21:44:55,632 INFO L226 Difference]: Without dead ends: 72 [2024-09-12 21:44:55,632 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 21:44:55,633 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 21:44:55,633 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 88 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 21:44:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-12 21:44:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-09-12 21:44:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 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 21:44:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2024-09-12 21:44:55,647 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 38 [2024-09-12 21:44:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:44:55,647 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2024-09-12 21:44:55,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 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 21:44:55,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:55,648 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2024-09-12 21:44:55,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-12 21:44:55,650 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:44:55,650 INFO L216 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:44:55,662 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 21:44:55,853 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:55,853 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:44:55,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:55,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2022631158, now seen corresponding path program 5 times [2024-09-12 21:44:55,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:44:55,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742675148] [2024-09-12 21:44:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:44:55,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:44:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:56,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:44:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:44:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:56,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:44:56,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742675148] [2024-09-12 21:44:56,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742675148] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:44:56,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912542547] [2024-09-12 21:44:56,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 21:44:56,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:44:56,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:44:56,627 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 21:44:56,629 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 21:44:56,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2024-09-12 21:44:56,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:44:56,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 21:44:56,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:44:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:56,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:44:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:44:57,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912542547] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:44:57,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:44:57,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-09-12 21:44:57,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722418447] [2024-09-12 21:44:57,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:44:57,900 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-12 21:44:57,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:44:57,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-12 21:44:57,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2090, Invalid=2602, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 21:44:57,905 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 69 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 67 states have internal predecessors, (133), 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 21:44:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:44:58,020 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2024-09-12 21:44:58,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-12 21:44:58,021 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 67 states have internal predecessors, (133), 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 70 [2024-09-12 21:44:58,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:44:58,022 INFO L225 Difference]: With dead ends: 172 [2024-09-12 21:44:58,022 INFO L226 Difference]: Without dead ends: 136 [2024-09-12 21:44:58,024 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2096, Invalid=2734, Unknown=0, NotChecked=0, Total=4830 [2024-09-12 21:44:58,024 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 106 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 21:44:58,025 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 149 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 21:44:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-12 21:44:58,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2024-09-12 21:44:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 21:44:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2024-09-12 21:44:58,036 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 70 [2024-09-12 21:44:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:44:58,036 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2024-09-12 21:44:58,036 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 67 states have internal predecessors, (133), 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 21:44:58,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2024-09-12 21:44:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-12 21:44:58,039 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:44:58,039 INFO L216 NwaCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:44:58,051 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 21:44:58,242 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 21:44:58,243 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:44:58,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:44:58,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1191032694, now seen corresponding path program 6 times [2024-09-12 21:44:58,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:44:58,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746214892] [2024-09-12 21:44:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:44:58,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:44:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:45:00,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:45:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:45:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:45:00,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:45:00,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746214892] [2024-09-12 21:45:00,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746214892] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:45:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214655560] [2024-09-12 21:45:00,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 21:45:00,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:45:00,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:45:00,264 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 21:45:00,268 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 21:45:00,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2024-09-12 21:45:00,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:45:00,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-12 21:45:00,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:45:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:45:00,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:45:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:45:03,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214655560] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:45:03,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:45:03,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2024-09-12 21:45:03,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133982953] [2024-09-12 21:45:03,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:45:03,704 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-09-12 21:45:03,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:45:03,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-09-12 21:45:03,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8266, Invalid=9290, Unknown=0, NotChecked=0, Total=17556 [2024-09-12 21:45:03,709 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 133 states, 133 states have (on average 1.962406015037594) internal successors, (261), 131 states have internal predecessors, (261), 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 21:45:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:45:04,066 INFO L93 Difference]: Finished difference Result 332 states and 395 transitions. [2024-09-12 21:45:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2024-09-12 21:45:04,067 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.962406015037594) internal successors, (261), 131 states have internal predecessors, (261), 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 134 [2024-09-12 21:45:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:45:04,069 INFO L225 Difference]: With dead ends: 332 [2024-09-12 21:45:04,069 INFO L226 Difference]: Without dead ends: 264 [2024-09-12 21:45:04,072 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8272, Invalid=9550, Unknown=0, NotChecked=0, Total=17822 [2024-09-12 21:45:04,073 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 221 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 21:45:04,073 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 272 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 21:45:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-09-12 21:45:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2024-09-12 21:45:04,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 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 21:45:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2024-09-12 21:45:04,089 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 134 [2024-09-12 21:45:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:45:04,090 INFO L474 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2024-09-12 21:45:04,090 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.962406015037594) internal successors, (261), 131 states have internal predecessors, (261), 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 21:45:04,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:45:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2024-09-12 21:45:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2024-09-12 21:45:04,092 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:45:04,093 INFO L216 NwaCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:45:04,105 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 21:45:04,293 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:45:04,294 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:45:04,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:45:04,294 INFO L85 PathProgramCache]: Analyzing trace with hash -126834806, now seen corresponding path program 7 times [2024-09-12 21:45:04,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:45:04,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039732837] [2024-09-12 21:45:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:45:04,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:45:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:45:10,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:45:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:45:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:45:10,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:45:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039732837] [2024-09-12 21:45:10,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039732837] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:45:10,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112128185] [2024-09-12 21:45:10,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 21:45:10,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:45:10,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:45:10,531 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 21:45:10,532 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 21:45:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:45:10,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 130 conjuncts are in the unsatisfiable core [2024-09-12 21:45:10,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:45:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:45:11,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:45:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:45:23,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112128185] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:45:23,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:45:23,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 261 [2024-09-12 21:45:23,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256289712] [2024-09-12 21:45:23,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:45:23,073 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2024-09-12 21:45:23,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:45:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2024-09-12 21:45:23,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32906, Invalid=34954, Unknown=0, NotChecked=0, Total=67860 [2024-09-12 21:45:23,083 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand has 261 states, 261 states have (on average 1.9808429118773947) internal successors, (517), 259 states have internal predecessors, (517), 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 21:45:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:45:24,620 INFO L93 Difference]: Finished difference Result 652 states and 779 transitions. [2024-09-12 21:45:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2024-09-12 21:45:24,621 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 1.9808429118773947) internal successors, (517), 259 states have internal predecessors, (517), 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 262 [2024-09-12 21:45:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:45:24,623 INFO L225 Difference]: With dead ends: 652 [2024-09-12 21:45:24,623 INFO L226 Difference]: Without dead ends: 520 [2024-09-12 21:45:24,627 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 395 SyntacticMatches, 2 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=32912, Invalid=35470, Unknown=0, NotChecked=0, Total=68382 [2024-09-12 21:45:24,627 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 491 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 21:45:24,628 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 463 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 21:45:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2024-09-12 21:45:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 519. [2024-09-12 21:45:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 514 states have (on average 1.0019455252918288) internal successors, (515), 514 states have internal predecessors, (515), 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 21:45:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 519 transitions. [2024-09-12 21:45:24,668 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 519 transitions. Word has length 262 [2024-09-12 21:45:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:45:24,669 INFO L474 AbstractCegarLoop]: Abstraction has 519 states and 519 transitions. [2024-09-12 21:45:24,669 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 1.9808429118773947) internal successors, (517), 259 states have internal predecessors, (517), 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 21:45:24,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:45:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 519 transitions. [2024-09-12 21:45:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2024-09-12 21:45:24,677 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:45:24,677 INFO L216 NwaCegarLoop]: trace histogram [254, 254, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:45:24,691 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 21:45:24,877 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:45:24,878 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:45:24,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:45:24,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1753048458, now seen corresponding path program 8 times [2024-09-12 21:45:24,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:45:24,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916011571] [2024-09-12 21:45:24,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:45:24,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:45:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:45:50,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:45:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:45:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:45:50,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:45:50,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916011571] [2024-09-12 21:45:50,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916011571] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:45:50,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316200274] [2024-09-12 21:45:50,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 21:45:50,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:45:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:45:50,683 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 21:45:50,684 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 21:45:50,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 21:45:50,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:45:50,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 2324 conjuncts, 258 conjuncts are in the unsatisfiable core [2024-09-12 21:45:50,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:45:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:45:51,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:46:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:46:39,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316200274] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:46:39,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:46:39,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [259, 259, 259] total 517 [2024-09-12 21:46:39,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071240046] [2024-09-12 21:46:39,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:46:39,051 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 517 states [2024-09-12 21:46:39,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:46:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 517 interpolants. [2024-09-12 21:46:39,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131338, Invalid=135434, Unknown=0, NotChecked=0, Total=266772 [2024-09-12 21:46:39,081 INFO L87 Difference]: Start difference. First operand 519 states and 519 transitions. Second operand has 517 states, 517 states have (on average 1.990328820116054) internal successors, (1029), 515 states have internal predecessors, (1029), 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 21:46:53,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:46:53,782 INFO L93 Difference]: Finished difference Result 1292 states and 1547 transitions. [2024-09-12 21:46:53,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 514 states. [2024-09-12 21:46:53,783 INFO L78 Accepts]: Start accepts. Automaton has has 517 states, 517 states have (on average 1.990328820116054) internal successors, (1029), 515 states have internal predecessors, (1029), 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 518 [2024-09-12 21:46:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:46:53,787 INFO L225 Difference]: With dead ends: 1292 [2024-09-12 21:46:53,787 INFO L226 Difference]: Without dead ends: 1032 [2024-09-12 21:46:53,795 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1297 GetRequests, 779 SyntacticMatches, 2 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3316 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=131344, Invalid=136462, Unknown=0, NotChecked=0, Total=267806 [2024-09-12 21:46:53,796 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 1059 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 21:46:53,796 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 865 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 21:46:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2024-09-12 21:46:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1031. [2024-09-12 21:46:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1026 states have (on average 1.0009746588693957) internal successors, (1027), 1026 states have internal predecessors, (1027), 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 21:46:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1031 transitions. [2024-09-12 21:46:53,839 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1031 transitions. Word has length 518 [2024-09-12 21:46:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:46:53,839 INFO L474 AbstractCegarLoop]: Abstraction has 1031 states and 1031 transitions. [2024-09-12 21:46:53,840 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 517 states, 517 states have (on average 1.990328820116054) internal successors, (1029), 515 states have internal predecessors, (1029), 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 21:46:53,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:46:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1031 transitions. [2024-09-12 21:46:53,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2024-09-12 21:46:53,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:46:53,859 INFO L216 NwaCegarLoop]: trace histogram [510, 510, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:46:53,874 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 21:46:54,059 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:46:54,060 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:46:54,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:46:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash 223797642, now seen corresponding path program 9 times [2024-09-12 21:46:54,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:46:54,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266352817] [2024-09-12 21:46:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:46:54,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:46:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:48:58,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 21:48:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 21:48:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:48:58,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 21:48:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266352817] [2024-09-12 21:48:58,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266352817] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 21:48:58,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828817863] [2024-09-12 21:48:58,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 21:48:58,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 21:48:58,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 21:48:58,215 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 21:48:58,216 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 21:49:01,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 511 check-sat command(s) [2024-09-12 21:49:01,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 21:49:01,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 4628 conjuncts, 517 conjuncts are in the unsatisfiable core [2024-09-12 21:49:01,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 21:49:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:49:02,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 21:52:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 260100 backedges. 0 proven. 260100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 21:52:19,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828817863] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 21:52:19,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 21:52:19,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [515, 515, 515] total 1029 [2024-09-12 21:52:19,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144789987] [2024-09-12 21:52:19,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 21:52:19,496 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 1029 states [2024-09-12 21:52:19,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 21:52:19,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1029 interpolants. [2024-09-12 21:52:19,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=524810, Invalid=533002, Unknown=0, NotChecked=0, Total=1057812 [2024-09-12 21:52:19,593 INFO L87 Difference]: Start difference. First operand 1031 states and 1031 transitions. Second operand has 1029 states, 1029 states have (on average 1.9951409135082605) internal successors, (2053), 1027 states have internal predecessors, (2053), 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 21:55:40,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 21:55:40,743 INFO L93 Difference]: Finished difference Result 2572 states and 3083 transitions. [2024-09-12 21:55:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1026 states. [2024-09-12 21:55:40,744 INFO L78 Accepts]: Start accepts. Automaton has has 1029 states, 1029 states have (on average 1.9951409135082605) internal successors, (2053), 1027 states have internal predecessors, (2053), 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 1030 [2024-09-12 21:55:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 21:55:40,751 INFO L225 Difference]: With dead ends: 2572 [2024-09-12 21:55:40,752 INFO L226 Difference]: Without dead ends: 2056 [2024-09-12 21:55:40,794 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2577 GetRequests, 1549 SyntacticMatches, 0 SemanticMatches, 1028 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5618 ImplicationChecksByTransitivity, 259.2s TimeCoverageRelationStatistics Valid=524816, Invalid=535054, Unknown=0, NotChecked=0, Total=1059870 [2024-09-12 21:55:40,795 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 2902 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2902 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-12 21:55:40,795 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2902 Valid, 1613 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-12 21:55:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2024-09-12 21:55:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 2055. [2024-09-12 21:55:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2050 states have (on average 1.0004878048780488) internal successors, (2051), 2050 states have internal predecessors, (2051), 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 21:55:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 2055 transitions. [2024-09-12 21:55:40,885 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 2055 transitions. Word has length 1030 [2024-09-12 21:55:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 21:55:40,886 INFO L474 AbstractCegarLoop]: Abstraction has 2055 states and 2055 transitions. [2024-09-12 21:55:40,887 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 1029 states, 1029 states have (on average 1.9951409135082605) internal successors, (2053), 1027 states have internal predecessors, (2053), 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 21:55:40,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:55:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 2055 transitions. [2024-09-12 21:55:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2055 [2024-09-12 21:55:40,903 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 21:55:40,904 INFO L216 NwaCegarLoop]: trace histogram [1022, 1022, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 21:55:40,925 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 21:55:41,104 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 21:55:41,105 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 21:55:41,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 21:55:41,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1779030410, now seen corresponding path program 10 times [2024-09-12 21:55:41,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 21:55:41,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95463006] [2024-09-12 21:55:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 21:55:41,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 21:55:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15