./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/heapsort.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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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-invgen/heapsort.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 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 18:45:43,647 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:45:43,711 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:45:43,715 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:45:43,715 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:45:43,745 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:45:43,747 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:45:43,748 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:45:43,748 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:45:43,750 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:45:43,750 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:45:43,750 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:45:43,751 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:45:43,751 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:45:43,751 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:45:43,753 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:45:43,754 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:45:43,754 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:45:43,754 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:45:43,754 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:45:43,755 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:45:43,758 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:45:43,758 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:45:43,759 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:45:43,759 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:45:43,759 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:45:43,759 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:45:43,759 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:45:43,760 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:45:43,760 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:45:43,760 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:45:43,760 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:45:43,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:45:43,761 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:45:43,761 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:45:43,761 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:45:43,761 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:45:43,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:45:43,762 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:45:43,763 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:45:43,764 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:45:43,765 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:45:43,765 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:45:44,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:45:44,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:45:44,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:45:44,052 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:45:44,052 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:45:44,053 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/heapsort.i [2024-09-20 18:45:45,444 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:45:45,636 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:45:45,637 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/heapsort.i [2024-09-20 18:45:45,644 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/72138de78/fad86360557b4009bbbc0535d3414c56/FLAG38000f7ae [2024-09-20 18:45:46,029 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/72138de78/fad86360557b4009bbbc0535d3414c56 [2024-09-20 18:45:46,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:45:46,032 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:45:46,033 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:45:46,033 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:45:46,037 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:45:46,038 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,039 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457c67a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46, skipping insertion in model container [2024-09-20 18:45:46,039 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,058 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:45:46,221 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2024-09-20 18:45:46,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:45:46,269 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:45:46,285 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/heapsort.i[893,906] [2024-09-20 18:45:46,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:45:46,314 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:45:46,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46 WrapperNode [2024-09-20 18:45:46,315 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:45:46,317 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:45:46,317 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:45:46,317 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:45:46,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,329 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,336 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:45:46,336 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:45:46,337 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:45:46,337 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:45:46,337 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:45:46,345 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,347 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,358 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]. [2024-09-20 18:45:46,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,361 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,364 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,365 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,366 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,367 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:45:46,368 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:45:46,369 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:45:46,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:45:46,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (1/1) ... [2024-09-20 18:45:46,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:45:46,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:45:46,408 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) [2024-09-20 18:45:46,412 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 [2024-09-20 18:45:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:45:46,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:45:46,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:45:46,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:45:46,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:45:46,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:45:46,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:45:46,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:45:46,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:45:46,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:45:46,525 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:45:46,530 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:45:46,736 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-20 18:45:46,738 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:45:46,759 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:45:46,759 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 18:45:46,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:45:46 BoogieIcfgContainer [2024-09-20 18:45:46,760 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:45:46,762 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:45:46,763 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:45:46,766 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:45:46,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:45:46" (1/3) ... [2024-09-20 18:45:46,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34830a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:45:46, skipping insertion in model container [2024-09-20 18:45:46,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:45:46" (2/3) ... [2024-09-20 18:45:46,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34830a94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:45:46, skipping insertion in model container [2024-09-20 18:45:46,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:45:46" (3/3) ... [2024-09-20 18:45:46,771 INFO L112 eAbstractionObserver]: Analyzing ICFG heapsort.i [2024-09-20 18:45:46,786 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:45:46,786 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:45:46,834 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:45:46,840 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;@4a93bd89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:45:46,840 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:45:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-20 18:45:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 18:45:46,853 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:46,854 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:46,855 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:46,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:46,861 INFO L85 PathProgramCache]: Analyzing trace with hash 855475308, now seen corresponding path program 1 times [2024-09-20 18:45:46,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:46,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466721101] [2024-09-20 18:45:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:46,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:47,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:45:47,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:47,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466721101] [2024-09-20 18:45:47,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466721101] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:47,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:47,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 18:45:47,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359058959] [2024-09-20 18:45:47,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:47,221 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 18:45:47,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:47,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 18:45:47,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:45:47,249 INFO L87 Difference]: Start difference. First operand has 43 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:45:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:47,514 INFO L93 Difference]: Finished difference Result 113 states and 211 transitions. [2024-09-20 18:45:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:45:47,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-20 18:45:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:47,526 INFO L225 Difference]: With dead ends: 113 [2024-09-20 18:45:47,526 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 18:45:47,529 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:45:47,532 INFO L434 NwaCegarLoop]: 73 mSDtfsCounter, 34 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:47,533 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 293 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:45:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 18:45:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2024-09-20 18:45:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-20 18:45:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 91 transitions. [2024-09-20 18:45:47,584 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 91 transitions. Word has length 14 [2024-09-20 18:45:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:47,585 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 91 transitions. [2024-09-20 18:45:47,585 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:45:47,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 91 transitions. [2024-09-20 18:45:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 18:45:47,587 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:47,588 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:47,588 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:45:47,588 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:47,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:47,589 INFO L85 PathProgramCache]: Analyzing trace with hash 843231207, now seen corresponding path program 1 times [2024-09-20 18:45:47,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:47,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819548744] [2024-09-20 18:45:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:47,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:47,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:45:47,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:47,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819548744] [2024-09-20 18:45:47,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819548744] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:47,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:47,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 18:45:47,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842528353] [2024-09-20 18:45:47,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:47,734 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 18:45:47,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:47,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 18:45:47,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:45:47,736 INFO L87 Difference]: Start difference. First operand 59 states and 91 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:45:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:47,964 INFO L93 Difference]: Finished difference Result 117 states and 183 transitions. [2024-09-20 18:45:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:45:47,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-20 18:45:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:47,968 INFO L225 Difference]: With dead ends: 117 [2024-09-20 18:45:47,968 INFO L226 Difference]: Without dead ends: 115 [2024-09-20 18:45:47,969 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:45:47,970 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 29 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:47,971 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 209 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:45:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-20 18:45:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2024-09-20 18:45:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 48 states have call successors, (48), 6 states have call predecessors, (48), 5 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-20 18:45:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 167 transitions. [2024-09-20 18:45:48,009 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 167 transitions. Word has length 14 [2024-09-20 18:45:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:48,009 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 167 transitions. [2024-09-20 18:45:48,009 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:45:48,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 167 transitions. [2024-09-20 18:45:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 18:45:48,011 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:48,011 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:48,013 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:45:48,014 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:48,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:48,015 INFO L85 PathProgramCache]: Analyzing trace with hash 842919880, now seen corresponding path program 1 times [2024-09-20 18:45:48,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:48,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26633248] [2024-09-20 18:45:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:48,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:48,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:48,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:45:48,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:48,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26633248] [2024-09-20 18:45:48,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26633248] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:48,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:48,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 18:45:48,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142277166] [2024-09-20 18:45:48,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:48,157 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 18:45:48,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:48,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 18:45:48,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:45:48,158 INFO L87 Difference]: Start difference. First operand 106 states and 167 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:45:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:48,359 INFO L93 Difference]: Finished difference Result 161 states and 257 transitions. [2024-09-20 18:45:48,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 18:45:48,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-20 18:45:48,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:48,366 INFO L225 Difference]: With dead ends: 161 [2024-09-20 18:45:48,367 INFO L226 Difference]: Without dead ends: 159 [2024-09-20 18:45:48,369 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:45:48,370 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 31 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:48,371 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 200 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:45:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-20 18:45:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2024-09-20 18:45:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 63 states have (on average 1.380952380952381) internal successors, (87), 67 states have internal predecessors, (87), 72 states have call successors, (72), 7 states have call predecessors, (72), 6 states have return successors, (71), 67 states have call predecessors, (71), 71 states have call successors, (71) [2024-09-20 18:45:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 230 transitions. [2024-09-20 18:45:48,417 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 230 transitions. Word has length 19 [2024-09-20 18:45:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:48,417 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 230 transitions. [2024-09-20 18:45:48,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:45:48,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 230 transitions. [2024-09-20 18:45:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 18:45:48,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:48,420 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:48,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 18:45:48,421 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:48,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:48,422 INFO L85 PathProgramCache]: Analyzing trace with hash 303375166, now seen corresponding path program 1 times [2024-09-20 18:45:48,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:48,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690733869] [2024-09-20 18:45:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:48,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:48,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:48,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:48,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:45:48,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:48,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690733869] [2024-09-20 18:45:48,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690733869] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:48,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:48,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 18:45:48,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417199693] [2024-09-20 18:45:48,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:48,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:45:48,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:48,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:45:48,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:45:48,550 INFO L87 Difference]: Start difference. First operand 142 states and 230 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:45:48,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:48,802 INFO L93 Difference]: Finished difference Result 208 states and 342 transitions. [2024-09-20 18:45:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:45:48,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-20 18:45:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:48,812 INFO L225 Difference]: With dead ends: 208 [2024-09-20 18:45:48,812 INFO L226 Difference]: Without dead ends: 206 [2024-09-20 18:45:48,812 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:45:48,813 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 43 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:48,814 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 221 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:45:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-09-20 18:45:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2024-09-20 18:45:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 87 states have (on average 1.4022988505747127) internal successors, (122), 94 states have internal predecessors, (122), 108 states have call successors, (108), 8 states have call predecessors, (108), 7 states have return successors, (107), 100 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-20 18:45:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 337 transitions. [2024-09-20 18:45:48,897 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 337 transitions. Word has length 19 [2024-09-20 18:45:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:48,898 INFO L474 AbstractCegarLoop]: Abstraction has 203 states and 337 transitions. [2024-09-20 18:45:48,899 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:45:48,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 337 transitions. [2024-09-20 18:45:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 18:45:48,901 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:48,901 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:48,901 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 18:45:48,901 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:48,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:48,902 INFO L85 PathProgramCache]: Analyzing trace with hash -283430848, now seen corresponding path program 1 times [2024-09-20 18:45:48,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:48,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280778546] [2024-09-20 18:45:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:48,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:48,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:48,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:45:48,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:48,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280778546] [2024-09-20 18:45:48,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280778546] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:48,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:48,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 18:45:48,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448773390] [2024-09-20 18:45:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:48,938 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 18:45:48,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 18:45:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 18:45:48,939 INFO L87 Difference]: Start difference. First operand 203 states and 337 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:45:49,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:49,029 INFO L93 Difference]: Finished difference Result 387 states and 649 transitions. [2024-09-20 18:45:49,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 18:45:49,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2024-09-20 18:45:49,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:49,035 INFO L225 Difference]: With dead ends: 387 [2024-09-20 18:45:49,035 INFO L226 Difference]: Without dead ends: 305 [2024-09-20 18:45:49,036 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 18:45:49,037 INFO L434 NwaCegarLoop]: 81 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 134 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 [2024-09-20 18:45:49,038 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 134 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:45:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-09-20 18:45:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 250. [2024-09-20 18:45:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 106 states have (on average 1.4150943396226414) internal successors, (150), 114 states have internal predecessors, (150), 136 states have call successors, (136), 8 states have call predecessors, (136), 7 states have return successors, (135), 127 states have call predecessors, (135), 135 states have call successors, (135) [2024-09-20 18:45:49,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 421 transitions. [2024-09-20 18:45:49,140 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 421 transitions. Word has length 19 [2024-09-20 18:45:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:49,140 INFO L474 AbstractCegarLoop]: Abstraction has 250 states and 421 transitions. [2024-09-20 18:45:49,140 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:45:49,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 421 transitions. [2024-09-20 18:45:49,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 18:45:49,142 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:49,142 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:49,142 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-20 18:45:49,142 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:49,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:49,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1858602097, now seen corresponding path program 1 times [2024-09-20 18:45:49,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:49,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214166372] [2024-09-20 18:45:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:49,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:49,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:49,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:49,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:45:49,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:49,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214166372] [2024-09-20 18:45:49,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214166372] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:49,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:49,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 18:45:49,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119282439] [2024-09-20 18:45:49,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:49,254 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 18:45:49,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 18:45:49,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:45:49,255 INFO L87 Difference]: Start difference. First operand 250 states and 421 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:45:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:49,442 INFO L93 Difference]: Finished difference Result 338 states and 568 transitions. [2024-09-20 18:45:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:45:49,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-09-20 18:45:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:49,447 INFO L225 Difference]: With dead ends: 338 [2024-09-20 18:45:49,447 INFO L226 Difference]: Without dead ends: 336 [2024-09-20 18:45:49,448 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:45:49,450 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 42 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:49,453 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 248 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:45:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-09-20 18:45:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 304. [2024-09-20 18:45:49,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 132 states have (on average 1.4242424242424243) internal successors, (188), 146 states have internal predecessors, (188), 162 states have call successors, (162), 10 states have call predecessors, (162), 9 states have return successors, (161), 147 states have call predecessors, (161), 161 states have call successors, (161) [2024-09-20 18:45:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 511 transitions. [2024-09-20 18:45:49,569 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 511 transitions. Word has length 26 [2024-09-20 18:45:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:49,570 INFO L474 AbstractCegarLoop]: Abstraction has 304 states and 511 transitions. [2024-09-20 18:45:49,570 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:45:49,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:49,571 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 511 transitions. [2024-09-20 18:45:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 18:45:49,576 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:49,577 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:49,577 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-20 18:45:49,577 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:49,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:49,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1261754835, now seen corresponding path program 1 times [2024-09-20 18:45:49,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:49,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321511751] [2024-09-20 18:45:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:49,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:49,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:49,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:49,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:49,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 18:45:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:45:49,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:49,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321511751] [2024-09-20 18:45:49,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321511751] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:49,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:49,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 18:45:49,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192665169] [2024-09-20 18:45:49,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:49,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 18:45:49,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:49,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 18:45:49,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:45:49,688 INFO L87 Difference]: Start difference. First operand 304 states and 511 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 18:45:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:49,919 INFO L93 Difference]: Finished difference Result 370 states and 611 transitions. [2024-09-20 18:45:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 18:45:49,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-09-20 18:45:49,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:49,924 INFO L225 Difference]: With dead ends: 370 [2024-09-20 18:45:49,924 INFO L226 Difference]: Without dead ends: 368 [2024-09-20 18:45:49,925 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:45:49,927 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 25 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:49,928 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 251 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:45:49,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-09-20 18:45:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2024-09-20 18:45:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 146 states have (on average 1.4109589041095891) internal successors, (206), 164 states have internal predecessors, (206), 186 states have call successors, (186), 12 states have call predecessors, (186), 11 states have return successors, (185), 167 states have call predecessors, (185), 185 states have call successors, (185) [2024-09-20 18:45:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 577 transitions. [2024-09-20 18:45:50,026 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 577 transitions. Word has length 29 [2024-09-20 18:45:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:50,026 INFO L474 AbstractCegarLoop]: Abstraction has 344 states and 577 transitions. [2024-09-20 18:45:50,026 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 18:45:50,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 577 transitions. [2024-09-20 18:45:50,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 18:45:50,028 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:50,028 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:50,028 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-20 18:45:50,028 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:50,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:50,029 INFO L85 PathProgramCache]: Analyzing trace with hash 887335745, now seen corresponding path program 1 times [2024-09-20 18:45:50,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:50,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247542069] [2024-09-20 18:45:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:50,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:50,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:50,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:50,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:45:50,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:50,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247542069] [2024-09-20 18:45:50,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247542069] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:50,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:50,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 18:45:50,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230400828] [2024-09-20 18:45:50,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:50,108 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 18:45:50,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 18:45:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:45:50,112 INFO L87 Difference]: Start difference. First operand 344 states and 577 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:45:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:50,450 INFO L93 Difference]: Finished difference Result 795 states and 1334 transitions. [2024-09-20 18:45:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:45:50,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-09-20 18:45:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:50,457 INFO L225 Difference]: With dead ends: 795 [2024-09-20 18:45:50,457 INFO L226 Difference]: Without dead ends: 540 [2024-09-20 18:45:50,459 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:45:50,460 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 53 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:50,462 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 183 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:45:50,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-20 18:45:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 345. [2024-09-20 18:45:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 147 states have (on average 1.401360544217687) internal successors, (206), 165 states have internal predecessors, (206), 186 states have call successors, (186), 12 states have call predecessors, (186), 11 states have return successors, (185), 167 states have call predecessors, (185), 185 states have call successors, (185) [2024-09-20 18:45:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 577 transitions. [2024-09-20 18:45:50,553 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 577 transitions. Word has length 28 [2024-09-20 18:45:50,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:50,555 INFO L474 AbstractCegarLoop]: Abstraction has 345 states and 577 transitions. [2024-09-20 18:45:50,555 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:45:50,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:50,556 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 577 transitions. [2024-09-20 18:45:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 18:45:50,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:50,557 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:50,558 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-20 18:45:50,558 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:50,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:50,558 INFO L85 PathProgramCache]: Analyzing trace with hash 969267811, now seen corresponding path program 1 times [2024-09-20 18:45:50,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:50,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512326055] [2024-09-20 18:45:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:50,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:50,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:50,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:50,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:50,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 18:45:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:45:50,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512326055] [2024-09-20 18:45:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512326055] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:50,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:50,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 18:45:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534205026] [2024-09-20 18:45:50,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:50,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:45:50,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:45:50,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:45:50,690 INFO L87 Difference]: Start difference. First operand 345 states and 577 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 18:45:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:51,007 INFO L93 Difference]: Finished difference Result 542 states and 924 transitions. [2024-09-20 18:45:51,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:45:51,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-09-20 18:45:51,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:51,013 INFO L225 Difference]: With dead ends: 542 [2024-09-20 18:45:51,013 INFO L226 Difference]: Without dead ends: 540 [2024-09-20 18:45:51,013 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:45:51,014 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 52 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:51,014 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 271 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:45:51,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-20 18:45:51,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 492. [2024-09-20 18:45:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 202 states have (on average 1.4306930693069306) internal successors, (289), 232 states have internal predecessors, (289), 277 states have call successors, (277), 13 states have call predecessors, (277), 12 states have return successors, (276), 246 states have call predecessors, (276), 276 states have call successors, (276) [2024-09-20 18:45:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 842 transitions. [2024-09-20 18:45:51,164 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 842 transitions. Word has length 31 [2024-09-20 18:45:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:51,164 INFO L474 AbstractCegarLoop]: Abstraction has 492 states and 842 transitions. [2024-09-20 18:45:51,165 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 18:45:51,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 842 transitions. [2024-09-20 18:45:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 18:45:51,166 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:51,166 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:51,166 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-20 18:45:51,166 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:51,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:51,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1109816421, now seen corresponding path program 1 times [2024-09-20 18:45:51,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:51,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317734672] [2024-09-20 18:45:51,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:51,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 18:45:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:45:51,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:51,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317734672] [2024-09-20 18:45:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317734672] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:51,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:51,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 18:45:51,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043503355] [2024-09-20 18:45:51,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:51,249 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:45:51,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:45:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:45:51,250 INFO L87 Difference]: Start difference. First operand 492 states and 842 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 18:45:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:51,522 INFO L93 Difference]: Finished difference Result 562 states and 954 transitions. [2024-09-20 18:45:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 18:45:51,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2024-09-20 18:45:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:51,528 INFO L225 Difference]: With dead ends: 562 [2024-09-20 18:45:51,528 INFO L226 Difference]: Without dead ends: 560 [2024-09-20 18:45:51,528 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:45:51,529 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 75 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:51,529 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 208 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:45:51,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2024-09-20 18:45:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 499. [2024-09-20 18:45:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 205 states have (on average 1.424390243902439) internal successors, (292), 235 states have internal predecessors, (292), 280 states have call successors, (280), 14 states have call predecessors, (280), 13 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-20 18:45:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 851 transitions. [2024-09-20 18:45:51,648 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 851 transitions. Word has length 31 [2024-09-20 18:45:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:51,648 INFO L474 AbstractCegarLoop]: Abstraction has 499 states and 851 transitions. [2024-09-20 18:45:51,648 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-20 18:45:51,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 851 transitions. [2024-09-20 18:45:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 18:45:51,652 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:51,652 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:51,652 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-20 18:45:51,652 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:51,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:51,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1192529802, now seen corresponding path program 1 times [2024-09-20 18:45:51,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:51,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74078505] [2024-09-20 18:45:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:51,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:51,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 18:45:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 18:45:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 18:45:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 18:45:51,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:51,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74078505] [2024-09-20 18:45:51,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74078505] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:51,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:51,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 18:45:51,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640053985] [2024-09-20 18:45:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:51,760 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:45:51,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:51,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:45:51,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:45:51,761 INFO L87 Difference]: Start difference. First operand 499 states and 851 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 18:45:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:52,026 INFO L93 Difference]: Finished difference Result 557 states and 928 transitions. [2024-09-20 18:45:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:45:52,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2024-09-20 18:45:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:52,031 INFO L225 Difference]: With dead ends: 557 [2024-09-20 18:45:52,032 INFO L226 Difference]: Without dead ends: 555 [2024-09-20 18:45:52,032 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:45:52,033 INFO L434 NwaCegarLoop]: 70 mSDtfsCounter, 35 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:52,033 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 259 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:45:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2024-09-20 18:45:52,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 503. [2024-09-20 18:45:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 208 states have (on average 1.4182692307692308) internal successors, (295), 238 states have internal predecessors, (295), 280 states have call successors, (280), 15 states have call predecessors, (280), 14 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-20 18:45:52,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 854 transitions. [2024-09-20 18:45:52,163 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 854 transitions. Word has length 41 [2024-09-20 18:45:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:52,163 INFO L474 AbstractCegarLoop]: Abstraction has 503 states and 854 transitions. [2024-09-20 18:45:52,163 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 18:45:52,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 854 transitions. [2024-09-20 18:45:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 18:45:52,165 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:52,165 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:52,165 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-20 18:45:52,165 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:52,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:52,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2122421222, now seen corresponding path program 1 times [2024-09-20 18:45:52,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:52,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134702138] [2024-09-20 18:45:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:52,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:45:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 18:45:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:45:52,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:52,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134702138] [2024-09-20 18:45:52,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134702138] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:52,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:52,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 18:45:52,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739357456] [2024-09-20 18:45:52,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:52,274 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:45:52,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:45:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:45:52,275 INFO L87 Difference]: Start difference. First operand 503 states and 854 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 18:45:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:52,571 INFO L93 Difference]: Finished difference Result 534 states and 893 transitions. [2024-09-20 18:45:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:45:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2024-09-20 18:45:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:52,577 INFO L225 Difference]: With dead ends: 534 [2024-09-20 18:45:52,577 INFO L226 Difference]: Without dead ends: 532 [2024-09-20 18:45:52,577 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:45:52,578 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:52,578 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 188 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:45:52,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2024-09-20 18:45:52,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 511. [2024-09-20 18:45:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 214 states have (on average 1.4065420560747663) internal successors, (301), 244 states have internal predecessors, (301), 280 states have call successors, (280), 17 states have call predecessors, (280), 16 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-20 18:45:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 860 transitions. [2024-09-20 18:45:52,718 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 860 transitions. Word has length 41 [2024-09-20 18:45:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:52,718 INFO L474 AbstractCegarLoop]: Abstraction has 511 states and 860 transitions. [2024-09-20 18:45:52,718 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 18:45:52,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 860 transitions. [2024-09-20 18:45:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 18:45:52,720 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:52,721 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:52,721 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-20 18:45:52,721 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:52,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:52,721 INFO L85 PathProgramCache]: Analyzing trace with hash 290316784, now seen corresponding path program 1 times [2024-09-20 18:45:52,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:52,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831697602] [2024-09-20 18:45:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:52,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:45:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 18:45:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 18:45:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 18:45:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 18:45:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831697602] [2024-09-20 18:45:52,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831697602] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:52,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:45:52,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 18:45:52,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272856388] [2024-09-20 18:45:52,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:52,820 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:45:52,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:45:52,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:45:52,821 INFO L87 Difference]: Start difference. First operand 511 states and 860 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 18:45:53,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:53,052 INFO L93 Difference]: Finished difference Result 578 states and 966 transitions. [2024-09-20 18:45:53,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:45:53,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2024-09-20 18:45:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:53,058 INFO L225 Difference]: With dead ends: 578 [2024-09-20 18:45:53,058 INFO L226 Difference]: Without dead ends: 576 [2024-09-20 18:45:53,058 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:45:53,059 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 41 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:53,059 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 234 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:45:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-09-20 18:45:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 515. [2024-09-20 18:45:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 217 states have (on average 1.400921658986175) internal successors, (304), 247 states have internal predecessors, (304), 280 states have call successors, (280), 18 states have call predecessors, (280), 17 states have return successors, (279), 249 states have call predecessors, (279), 279 states have call successors, (279) [2024-09-20 18:45:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 863 transitions. [2024-09-20 18:45:53,188 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 863 transitions. Word has length 53 [2024-09-20 18:45:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:53,188 INFO L474 AbstractCegarLoop]: Abstraction has 515 states and 863 transitions. [2024-09-20 18:45:53,188 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 18:45:53,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 863 transitions. [2024-09-20 18:45:53,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 18:45:53,190 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:53,190 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:53,191 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-20 18:45:53,191 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:53,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:53,191 INFO L85 PathProgramCache]: Analyzing trace with hash 822747500, now seen corresponding path program 1 times [2024-09-20 18:45:53,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:53,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576497356] [2024-09-20 18:45:53,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:53,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:53,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:53,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:53,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:53,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 18:45:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:53,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-20 18:45:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:53,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 18:45:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:53,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 18:45:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:53,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-20 18:45:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:53,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-20 18:45:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 18:45:53,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:53,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576497356] [2024-09-20 18:45:53,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576497356] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:45:53,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460951572] [2024-09-20 18:45:53,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:53,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:45:53,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:45:53,264 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) [2024-09-20 18:45:53,265 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 18:45:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:53,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 18:45:53,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:45:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-20 18:45:53,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 18:45:53,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460951572] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:53,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 18:45:53,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2024-09-20 18:45:53,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777562354] [2024-09-20 18:45:53,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:53,477 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 18:45:53,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:53,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 18:45:53,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:45:53,479 INFO L87 Difference]: Start difference. First operand 515 states and 863 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 18:45:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:53,844 INFO L93 Difference]: Finished difference Result 932 states and 1539 transitions. [2024-09-20 18:45:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:45:53,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2024-09-20 18:45:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:53,850 INFO L225 Difference]: With dead ends: 932 [2024-09-20 18:45:53,850 INFO L226 Difference]: Without dead ends: 476 [2024-09-20 18:45:53,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:45:53,853 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 34 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:53,853 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 216 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:45:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2024-09-20 18:45:53,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 446. [2024-09-20 18:45:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 196 states have (on average 1.3673469387755102) internal successors, (268), 220 states have internal predecessors, (268), 232 states have call successors, (232), 18 states have call predecessors, (232), 17 states have return successors, (231), 207 states have call predecessors, (231), 231 states have call successors, (231) [2024-09-20 18:45:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 731 transitions. [2024-09-20 18:45:53,975 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 731 transitions. Word has length 61 [2024-09-20 18:45:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:53,975 INFO L474 AbstractCegarLoop]: Abstraction has 446 states and 731 transitions. [2024-09-20 18:45:53,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 18:45:53,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:53,976 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 731 transitions. [2024-09-20 18:45:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-20 18:45:53,977 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:53,978 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:53,997 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 18:45:54,181 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 18:45:54,182 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:54,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:54,182 INFO L85 PathProgramCache]: Analyzing trace with hash 968879790, now seen corresponding path program 1 times [2024-09-20 18:45:54,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:54,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866245900] [2024-09-20 18:45:54,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:54,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 18:45:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 18:45:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 18:45:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 18:45:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 18:45:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-20 18:45:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 18:45:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 18:45:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 18:45:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-20 18:45:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 18:45:54,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:54,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866245900] [2024-09-20 18:45:54,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866245900] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:45:54,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889640833] [2024-09-20 18:45:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:54,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:45:54,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:45:54,368 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) [2024-09-20 18:45:54,369 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 18:45:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:54,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 18:45:54,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:45:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-20 18:45:54,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 18:45:54,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889640833] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:54,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 18:45:54,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-09-20 18:45:54,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604165280] [2024-09-20 18:45:54,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:54,700 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:45:54,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:54,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:45:54,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:45:54,701 INFO L87 Difference]: Start difference. First operand 446 states and 731 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-20 18:45:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:55,145 INFO L93 Difference]: Finished difference Result 813 states and 1310 transitions. [2024-09-20 18:45:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 18:45:55,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2024-09-20 18:45:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:55,149 INFO L225 Difference]: With dead ends: 813 [2024-09-20 18:45:55,149 INFO L226 Difference]: Without dead ends: 375 [2024-09-20 18:45:55,151 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-20 18:45:55,152 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 44 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:55,152 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 212 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:45:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-09-20 18:45:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 340. [2024-09-20 18:45:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 155 states have (on average 1.3290322580645162) internal successors, (206), 171 states have internal predecessors, (206), 168 states have call successors, (168), 17 states have call predecessors, (168), 16 states have return successors, (167), 151 states have call predecessors, (167), 167 states have call successors, (167) [2024-09-20 18:45:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 541 transitions. [2024-09-20 18:45:55,244 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 541 transitions. Word has length 83 [2024-09-20 18:45:55,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:55,245 INFO L474 AbstractCegarLoop]: Abstraction has 340 states and 541 transitions. [2024-09-20 18:45:55,245 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-20 18:45:55,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 541 transitions. [2024-09-20 18:45:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-20 18:45:55,246 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:55,246 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:55,264 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 18:45:55,448 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 18:45:55,448 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:55,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:55,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1787747476, now seen corresponding path program 1 times [2024-09-20 18:45:55,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:55,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502148564] [2024-09-20 18:45:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:55,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 18:45:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 18:45:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 18:45:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 18:45:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 18:45:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-20 18:45:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 18:45:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 18:45:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-20 18:45:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-20 18:45:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-20 18:45:55,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:55,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502148564] [2024-09-20 18:45:55,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502148564] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:45:55,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859705643] [2024-09-20 18:45:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:55,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:45:55,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:45:55,603 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) [2024-09-20 18:45:55,604 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 18:45:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:55,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:45:55,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:45:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-20 18:45:55,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 18:45:55,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859705643] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:45:55,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 18:45:55,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-20 18:45:55,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877328947] [2024-09-20 18:45:55,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:45:55,828 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 18:45:55,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:55,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 18:45:55,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:45:55,829 INFO L87 Difference]: Start difference. First operand 340 states and 541 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 18:45:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:56,077 INFO L93 Difference]: Finished difference Result 639 states and 1012 transitions. [2024-09-20 18:45:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:45:56,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 83 [2024-09-20 18:45:56,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:56,081 INFO L225 Difference]: With dead ends: 639 [2024-09-20 18:45:56,081 INFO L226 Difference]: Without dead ends: 293 [2024-09-20 18:45:56,083 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:45:56,083 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:56,084 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 183 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:45:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-20 18:45:56,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 283. [2024-09-20 18:45:56,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 130 states have (on average 1.3076923076923077) internal successors, (170), 144 states have internal predecessors, (170), 136 states have call successors, (136), 17 states have call predecessors, (136), 16 states have return successors, (135), 121 states have call predecessors, (135), 135 states have call successors, (135) [2024-09-20 18:45:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 441 transitions. [2024-09-20 18:45:56,144 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 441 transitions. Word has length 83 [2024-09-20 18:45:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:56,145 INFO L474 AbstractCegarLoop]: Abstraction has 283 states and 441 transitions. [2024-09-20 18:45:56,145 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 18:45:56,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 441 transitions. [2024-09-20 18:45:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-20 18:45:56,149 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:56,149 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:56,166 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 18:45:56,353 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 18:45:56,354 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:56,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:56,354 INFO L85 PathProgramCache]: Analyzing trace with hash -680780915, now seen corresponding path program 1 times [2024-09-20 18:45:56,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:56,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747393353] [2024-09-20 18:45:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:56,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:45:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 18:45:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 18:45:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 18:45:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-20 18:45:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 18:45:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 18:45:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 18:45:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-20 18:45:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 18:45:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2024-09-20 18:45:56,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:56,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747393353] [2024-09-20 18:45:56,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747393353] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:45:56,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565662572] [2024-09-20 18:45:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:56,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:45:56,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:45:56,463 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) [2024-09-20 18:45:56,465 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 18:45:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:56,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-20 18:45:56,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:45:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-20 18:45:56,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:45:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2024-09-20 18:45:56,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565662572] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:45:56,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:45:56,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-09-20 18:45:56,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122872924] [2024-09-20 18:45:56,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:45:56,693 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 18:45:56,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:56,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 18:45:56,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:45:56,694 INFO L87 Difference]: Start difference. First operand 283 states and 441 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2024-09-20 18:45:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:45:57,687 INFO L93 Difference]: Finished difference Result 571 states and 876 transitions. [2024-09-20 18:45:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-20 18:45:57,688 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) Word has length 88 [2024-09-20 18:45:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:45:57,691 INFO L225 Difference]: With dead ends: 571 [2024-09-20 18:45:57,691 INFO L226 Difference]: Without dead ends: 343 [2024-09-20 18:45:57,693 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 18:45:57,693 INFO L434 NwaCegarLoop]: 158 mSDtfsCounter, 205 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 18:45:57,694 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 731 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 18:45:57,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-09-20 18:45:57,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 237. [2024-09-20 18:45:57,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 118 states have (on average 1.2372881355932204) internal successors, (146), 127 states have internal predecessors, (146), 102 states have call successors, (102), 17 states have call predecessors, (102), 16 states have return successors, (101), 92 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-20 18:45:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2024-09-20 18:45:57,757 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 88 [2024-09-20 18:45:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:45:57,757 INFO L474 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2024-09-20 18:45:57,757 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 6 states have call predecessors, (31), 6 states have call successors, (31) [2024-09-20 18:45:57,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2024-09-20 18:45:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-20 18:45:57,759 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:45:57,759 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:45:57,775 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 18:45:57,963 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:45:57,964 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:45:57,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:45:57,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1903110671, now seen corresponding path program 1 times [2024-09-20 18:45:57,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:45:57,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468854260] [2024-09-20 18:45:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:57,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:45:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:45:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:45:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:45:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:45:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 18:45:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 18:45:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 18:45:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 18:45:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 18:45:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 18:45:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 18:45:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 18:45:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 18:45:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 18:45:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-20 18:45:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-20 18:45:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-20 18:45:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 18:45:58,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:45:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468854260] [2024-09-20 18:45:58,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468854260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:45:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859295234] [2024-09-20 18:45:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:45:58,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:45:58,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:45:58,122 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) [2024-09-20 18:45:58,123 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 18:45:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:45:58,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:45:58,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:45:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-20 18:45:58,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:45:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 18:45:58,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859295234] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:45:58,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:45:58,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-09-20 18:45:58,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488358306] [2024-09-20 18:45:58,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:45:58,602 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 18:45:58,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:45:58,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 18:45:58,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-09-20 18:45:58,604 INFO L87 Difference]: Start difference. First operand 237 states and 349 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) [2024-09-20 18:46:00,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:46:00,712 INFO L93 Difference]: Finished difference Result 800 states and 1252 transitions. [2024-09-20 18:46:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-20 18:46:00,713 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) Word has length 110 [2024-09-20 18:46:00,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:46:00,718 INFO L225 Difference]: With dead ends: 800 [2024-09-20 18:46:00,718 INFO L226 Difference]: Without dead ends: 469 [2024-09-20 18:46:00,721 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=943, Invalid=2839, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 18:46:00,721 INFO L434 NwaCegarLoop]: 156 mSDtfsCounter, 371 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:46:00,722 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1097 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 18:46:00,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-09-20 18:46:00,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 372. [2024-09-20 18:46:00,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 173 states have (on average 1.2658959537572254) internal successors, (219), 187 states have internal predecessors, (219), 182 states have call successors, (182), 17 states have call predecessors, (182), 16 states have return successors, (181), 167 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-20 18:46:00,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 582 transitions. [2024-09-20 18:46:00,851 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 582 transitions. Word has length 110 [2024-09-20 18:46:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:46:00,851 INFO L474 AbstractCegarLoop]: Abstraction has 372 states and 582 transitions. [2024-09-20 18:46:00,852 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 13 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) [2024-09-20 18:46:00,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 582 transitions. [2024-09-20 18:46:00,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-20 18:46:00,853 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:46:00,853 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:00,870 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 18:46:01,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 18:46:01,058 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:46:01,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:01,058 INFO L85 PathProgramCache]: Analyzing trace with hash -853516595, now seen corresponding path program 1 times [2024-09-20 18:46:01,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:46:01,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735237368] [2024-09-20 18:46:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:01,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:46:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:46:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:46:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:46:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:46:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 18:46:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 18:46:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 18:46:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 18:46:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 18:46:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 18:46:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 18:46:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 18:46:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 18:46:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 18:46:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-20 18:46:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-20 18:46:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-20 18:46:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 18:46:01,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:46:01,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735237368] [2024-09-20 18:46:01,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735237368] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:46:01,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414497271] [2024-09-20 18:46:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:01,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:01,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:46:01,200 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) [2024-09-20 18:46:01,201 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 18:46:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:01,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 18:46:01,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:46:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 18:46:01,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:46:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-20 18:46:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414497271] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:46:01,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:46:01,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-09-20 18:46:01,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717534342] [2024-09-20 18:46:01,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:46:01,445 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 18:46:01,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:46:01,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 18:46:01,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:46:01,446 INFO L87 Difference]: Start difference. First operand 372 states and 582 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-20 18:46:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:46:01,777 INFO L93 Difference]: Finished difference Result 434 states and 675 transitions. [2024-09-20 18:46:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 18:46:01,777 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 110 [2024-09-20 18:46:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:46:01,781 INFO L225 Difference]: With dead ends: 434 [2024-09-20 18:46:01,781 INFO L226 Difference]: Without dead ends: 432 [2024-09-20 18:46:01,782 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 248 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2024-09-20 18:46:01,782 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 58 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:46:01,782 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 394 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:46:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2024-09-20 18:46:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 376. [2024-09-20 18:46:01,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 176 states have (on average 1.2613636363636365) internal successors, (222), 190 states have internal predecessors, (222), 182 states have call successors, (182), 18 states have call predecessors, (182), 17 states have return successors, (181), 167 states have call predecessors, (181), 181 states have call successors, (181) [2024-09-20 18:46:01,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 585 transitions. [2024-09-20 18:46:01,906 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 585 transitions. Word has length 110 [2024-09-20 18:46:01,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:46:01,906 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 585 transitions. [2024-09-20 18:46:01,907 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 6 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-20 18:46:01,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 585 transitions. [2024-09-20 18:46:01,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-20 18:46:01,908 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:46:01,909 INFO L216 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:01,922 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 18:46:02,109 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:02,109 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:46:02,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:02,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1133746567, now seen corresponding path program 2 times [2024-09-20 18:46:02,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:46:02,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852153878] [2024-09-20 18:46:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:46:02,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:46:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:46:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:46:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 18:46:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 18:46:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-20 18:46:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 18:46:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 18:46:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-20 18:46:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 18:46:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-20 18:46:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-20 18:46:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-20 18:46:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 18:46:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 18:46:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-20 18:46:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-20 18:46:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-20 18:46:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 18:46:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:46:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 18 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2024-09-20 18:46:02,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:46:02,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852153878] [2024-09-20 18:46:02,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852153878] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:46:02,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551304064] [2024-09-20 18:46:02,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:46:02,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:02,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:46:02,236 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) [2024-09-20 18:46:02,238 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 18:46:02,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:46:02,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:46:02,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 18:46:02,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:46:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-20 18:46:02,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:46:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-20 18:46:02,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551304064] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:46:02,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:46:02,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 19 [2024-09-20 18:46:02,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121086601] [2024-09-20 18:46:02,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:46:02,709 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 18:46:02,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:46:02,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 18:46:02,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-09-20 18:46:02,710 INFO L87 Difference]: Start difference. First operand 376 states and 585 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 10 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) [2024-09-20 18:46:03,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:46:03,872 INFO L93 Difference]: Finished difference Result 698 states and 1108 transitions. [2024-09-20 18:46:03,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 18:46:03,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 10 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) Word has length 115 [2024-09-20 18:46:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:46:03,874 INFO L225 Difference]: With dead ends: 698 [2024-09-20 18:46:03,874 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 18:46:03,878 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 18:46:03,878 INFO L434 NwaCegarLoop]: 78 mSDtfsCounter, 281 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 18:46:03,879 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 586 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 18:46:03,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 18:46:03,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 18:46:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 18:46:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 18:46:03,883 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2024-09-20 18:46:03,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:46:03,883 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 18:46:03,883 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 10 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (52), 10 states have call predecessors, (52), 10 states have call successors, (52) [2024-09-20 18:46:03,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:46:03,884 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 18:46:03,884 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 18:46:03,886 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 18:46:03,907 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 18:46:04,087 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:46:04,090 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:46:04,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.