./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 de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-de32597-m [2024-09-17 18:16:10,384 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:16:10,472 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:16:10,477 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:16:10,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:16:10,507 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:16:10,508 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:16:10,509 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:16:10,509 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:16:10,511 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:16:10,512 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:16:10,512 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:16:10,513 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:16:10,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:16:10,515 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:16:10,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:16:10,516 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:16:10,516 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:16:10,516 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:16:10,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:16:10,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:16:10,518 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:16:10,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:16:10,519 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:16:10,519 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:16:10,519 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:16:10,519 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:16:10,520 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:16:10,520 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:16:10,520 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:16:10,521 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:16:10,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:16:10,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:16:10,521 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:16:10,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:16:10,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:16:10,526 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:16:10,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:16:10,527 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:16:10,527 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:16:10,527 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:16:10,528 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:16:10,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:16:10,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:16:10,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:16:10,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:16:10,812 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:16:10,812 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:16:10,813 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/heapsort.i [2024-09-17 18:16:12,373 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:16:12,561 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:16:12,562 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/heapsort.i [2024-09-17 18:16:12,570 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c4013ecea/1375f601592a4e30836b5cb692323fba/FLAG48002881e [2024-09-17 18:16:12,950 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c4013ecea/1375f601592a4e30836b5cb692323fba [2024-09-17 18:16:12,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:16:12,955 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:16:12,959 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:16:12,960 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:16:12,965 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:16:12,966 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:16:12" (1/1) ... [2024-09-17 18:16:12,969 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19f63922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:12, skipping insertion in model container [2024-09-17 18:16:12,969 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:16:12" (1/1) ... [2024-09-17 18:16:12,991 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:16:13,157 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] [2024-09-17 18:16:13,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:16:13,198 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:16:13,210 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] [2024-09-17 18:16:13,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:16:13,236 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:16:13,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13 WrapperNode [2024-09-17 18:16:13,237 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:16:13,238 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:16:13,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:16:13,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:16:13,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,259 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,273 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:16:13,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:16:13,278 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:16:13,278 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:16:13,278 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:16:13,289 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,290 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,315 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]. [2024-09-17 18:16:13,316 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,317 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,324 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,328 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,333 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,334 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,336 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:16:13,341 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:16:13,341 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:16:13,341 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:16:13,343 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (1/1) ... [2024-09-17 18:16:13,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:16:13,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:13,384 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) [2024-09-17 18:16:13,390 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 [2024-09-17 18:16:13,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:16:13,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:16:13,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:16:13,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:16:13,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:16:13,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:16:13,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:16:13,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:16:13,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:16:13,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:16:13,521 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:16:13,523 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:16:13,725 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-17 18:16:13,725 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:16:13,749 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:16:13,750 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-17 18:16:13,752 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:16:13 BoogieIcfgContainer [2024-09-17 18:16:13,753 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:16:13,755 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:16:13,757 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:16:13,761 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:16:13,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:16:12" (1/3) ... [2024-09-17 18:16:13,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d64f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:16:13, skipping insertion in model container [2024-09-17 18:16:13,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:13" (2/3) ... [2024-09-17 18:16:13,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d64f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:16:13, skipping insertion in model container [2024-09-17 18:16:13,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:16:13" (3/3) ... [2024-09-17 18:16:13,765 INFO L112 eAbstractionObserver]: Analyzing ICFG heapsort.i [2024-09-17 18:16:13,783 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:16:13,783 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:16:13,864 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:16:13,875 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;@6bc5058c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:16:13,876 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:16:13,884 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) [2024-09-17 18:16:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-17 18:16:13,912 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:13,913 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:13,914 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:13,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:13,919 INFO L85 PathProgramCache]: Analyzing trace with hash 855475308, now seen corresponding path program 1 times [2024-09-17 18:16:13,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:13,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350445542] [2024-09-17 18:16:13,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:13,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:14,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:14,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:14,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350445542] [2024-09-17 18:16:14,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350445542] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:14,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:14,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 18:16:14,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713299015] [2024-09-17 18:16:14,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:14,304 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:16:14,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:14,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:16:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:16:14,334 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) [2024-09-17 18:16:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:14,661 INFO L93 Difference]: Finished difference Result 113 states and 211 transitions. [2024-09-17 18:16:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:16:14,664 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 [2024-09-17 18:16:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:14,673 INFO L225 Difference]: With dead ends: 113 [2024-09-17 18:16:14,673 INFO L226 Difference]: Without dead ends: 69 [2024-09-17 18:16:14,678 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 [2024-09-17 18:16:14,684 INFO L434 NwaCegarLoop]: 73 mSDtfsCounter, 34 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-09-17 18:16:14,688 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] [2024-09-17 18:16:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-17 18:16:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2024-09-17 18:16:14,739 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) [2024-09-17 18:16:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 91 transitions. [2024-09-17 18:16:14,744 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 91 transitions. Word has length 14 [2024-09-17 18:16:14,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:14,744 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 91 transitions. [2024-09-17 18:16:14,744 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) [2024-09-17 18:16:14,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:14,745 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 91 transitions. [2024-09-17 18:16:14,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-17 18:16:14,747 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:14,747 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:14,747 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:16:14,747 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:14,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:14,748 INFO L85 PathProgramCache]: Analyzing trace with hash 843231207, now seen corresponding path program 1 times [2024-09-17 18:16:14,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:14,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195383392] [2024-09-17 18:16:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:14,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:14,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:14,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:14,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195383392] [2024-09-17 18:16:14,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195383392] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:14,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:14,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 18:16:14,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462494687] [2024-09-17 18:16:14,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:14,920 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:16:14,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:16:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:16:14,926 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) [2024-09-17 18:16:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:15,133 INFO L93 Difference]: Finished difference Result 117 states and 183 transitions. [2024-09-17 18:16:15,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:16:15,135 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 [2024-09-17 18:16:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:15,138 INFO L225 Difference]: With dead ends: 117 [2024-09-17 18:16:15,138 INFO L226 Difference]: Without dead ends: 115 [2024-09-17 18:16:15,139 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 [2024-09-17 18:16:15,140 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 [2024-09-17 18:16:15,141 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] [2024-09-17 18:16:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-17 18:16:15,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2024-09-17 18:16:15,167 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) [2024-09-17 18:16:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 167 transitions. [2024-09-17 18:16:15,172 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 167 transitions. Word has length 14 [2024-09-17 18:16:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:15,172 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 167 transitions. [2024-09-17 18:16:15,173 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) [2024-09-17 18:16:15,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:15,173 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 167 transitions. [2024-09-17 18:16:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-17 18:16:15,174 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:15,174 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:15,175 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 18:16:15,175 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:15,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash 842919880, now seen corresponding path program 1 times [2024-09-17 18:16:15,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:15,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758196661] [2024-09-17 18:16:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:15,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:15,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:15,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:15,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:15,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758196661] [2024-09-17 18:16:15,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758196661] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:15,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:15,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 18:16:15,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428770625] [2024-09-17 18:16:15,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:15,376 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:16:15,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:15,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:16:15,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:16:15,378 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) [2024-09-17 18:16:15,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:15,610 INFO L93 Difference]: Finished difference Result 161 states and 257 transitions. [2024-09-17 18:16:15,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:16:15,611 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 [2024-09-17 18:16:15,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:15,613 INFO L225 Difference]: With dead ends: 161 [2024-09-17 18:16:15,613 INFO L226 Difference]: Without dead ends: 159 [2024-09-17 18:16:15,614 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 [2024-09-17 18:16:15,619 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:15,640 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 200 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:16:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-17 18:16:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2024-09-17 18:16:15,674 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) [2024-09-17 18:16:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 230 transitions. [2024-09-17 18:16:15,679 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 230 transitions. Word has length 19 [2024-09-17 18:16:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:15,680 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 230 transitions. [2024-09-17 18:16:15,680 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) [2024-09-17 18:16:15,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 230 transitions. [2024-09-17 18:16:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-17 18:16:15,682 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:15,682 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:15,682 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-17 18:16:15,683 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:15,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:15,683 INFO L85 PathProgramCache]: Analyzing trace with hash 303375166, now seen corresponding path program 1 times [2024-09-17 18:16:15,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:15,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117055205] [2024-09-17 18:16:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:15,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:15,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:15,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:15,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:15,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117055205] [2024-09-17 18:16:15,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117055205] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:15,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:15,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-17 18:16:15,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322374462] [2024-09-17 18:16:15,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:15,847 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:16:15,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:15,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:16:15,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:16:15,848 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) [2024-09-17 18:16:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:16,111 INFO L93 Difference]: Finished difference Result 208 states and 342 transitions. [2024-09-17 18:16:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:16:16,112 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 [2024-09-17 18:16:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:16,116 INFO L225 Difference]: With dead ends: 208 [2024-09-17 18:16:16,117 INFO L226 Difference]: Without dead ends: 206 [2024-09-17 18:16:16,118 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 [2024-09-17 18:16:16,119 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:16,119 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 221 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:16:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-09-17 18:16:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2024-09-17 18:16:16,187 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) [2024-09-17 18:16:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 337 transitions. [2024-09-17 18:16:16,192 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 337 transitions. Word has length 19 [2024-09-17 18:16:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:16,192 INFO L474 AbstractCegarLoop]: Abstraction has 203 states and 337 transitions. [2024-09-17 18:16:16,192 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) [2024-09-17 18:16:16,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 337 transitions. [2024-09-17 18:16:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-17 18:16:16,194 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:16,196 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:16,197 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-17 18:16:16,197 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:16,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:16,197 INFO L85 PathProgramCache]: Analyzing trace with hash -283430848, now seen corresponding path program 1 times [2024-09-17 18:16:16,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:16,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158069294] [2024-09-17 18:16:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:16,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:16,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:16,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:16,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:16,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158069294] [2024-09-17 18:16:16,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158069294] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:16,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:16,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 18:16:16,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79928347] [2024-09-17 18:16:16,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:16,254 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 18:16:16,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:16,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 18:16:16,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 18:16:16,255 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) [2024-09-17 18:16:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:16,364 INFO L93 Difference]: Finished difference Result 387 states and 649 transitions. [2024-09-17 18:16:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 18:16:16,365 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 [2024-09-17 18:16:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:16,370 INFO L225 Difference]: With dead ends: 387 [2024-09-17 18:16:16,372 INFO L226 Difference]: Without dead ends: 305 [2024-09-17 18:16:16,374 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 [2024-09-17 18:16:16,377 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 [2024-09-17 18:16:16,380 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] [2024-09-17 18:16:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-09-17 18:16:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 250. [2024-09-17 18:16:16,492 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) [2024-09-17 18:16:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 421 transitions. [2024-09-17 18:16:16,499 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 421 transitions. Word has length 19 [2024-09-17 18:16:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:16,500 INFO L474 AbstractCegarLoop]: Abstraction has 250 states and 421 transitions. [2024-09-17 18:16:16,500 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) [2024-09-17 18:16:16,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:16,502 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 421 transitions. [2024-09-17 18:16:16,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-17 18:16:16,504 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:16,504 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] [2024-09-17 18:16:16,506 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-17 18:16:16,506 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:16,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:16,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1858602097, now seen corresponding path program 1 times [2024-09-17 18:16:16,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:16,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189814387] [2024-09-17 18:16:16,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:16,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:16,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:16,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:16,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:16,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:16,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189814387] [2024-09-17 18:16:16,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189814387] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:16,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:16,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 18:16:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624516681] [2024-09-17 18:16:16,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:16,626 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:16:16,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:16,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:16:16,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:16:16,627 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) [2024-09-17 18:16:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:16,811 INFO L93 Difference]: Finished difference Result 338 states and 568 transitions. [2024-09-17 18:16:16,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:16:16,812 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 [2024-09-17 18:16:16,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:16,816 INFO L225 Difference]: With dead ends: 338 [2024-09-17 18:16:16,817 INFO L226 Difference]: Without dead ends: 336 [2024-09-17 18:16:16,817 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 [2024-09-17 18:16:16,818 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 [2024-09-17 18:16:16,818 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] [2024-09-17 18:16:16,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-09-17 18:16:16,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 304. [2024-09-17 18:16:16,903 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) [2024-09-17 18:16:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 511 transitions. [2024-09-17 18:16:16,906 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 511 transitions. Word has length 26 [2024-09-17 18:16:16,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:16,907 INFO L474 AbstractCegarLoop]: Abstraction has 304 states and 511 transitions. [2024-09-17 18:16:16,907 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) [2024-09-17 18:16:16,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:16,908 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 511 transitions. [2024-09-17 18:16:16,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-17 18:16:16,909 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:16,909 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] [2024-09-17 18:16:16,909 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-17 18:16:16,910 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:16,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:16,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1261754835, now seen corresponding path program 1 times [2024-09-17 18:16:16,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:16,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262522647] [2024-09-17 18:16:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:16,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:16,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:16,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:16,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:17,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:16:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:17,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:17,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262522647] [2024-09-17 18:16:17,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262522647] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:17,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:17,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 18:16:17,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247101804] [2024-09-17 18:16:17,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:17,014 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:16:17,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:17,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:16:17,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:16:17,016 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) [2024-09-17 18:16:17,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:17,244 INFO L93 Difference]: Finished difference Result 370 states and 611 transitions. [2024-09-17 18:16:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:16:17,245 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 [2024-09-17 18:16:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:17,250 INFO L225 Difference]: With dead ends: 370 [2024-09-17 18:16:17,250 INFO L226 Difference]: Without dead ends: 368 [2024-09-17 18:16:17,251 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 [2024-09-17 18:16:17,251 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 [2024-09-17 18:16:17,252 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] [2024-09-17 18:16:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-09-17 18:16:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2024-09-17 18:16:17,340 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) [2024-09-17 18:16:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 577 transitions. [2024-09-17 18:16:17,345 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 577 transitions. Word has length 29 [2024-09-17 18:16:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:17,346 INFO L474 AbstractCegarLoop]: Abstraction has 344 states and 577 transitions. [2024-09-17 18:16:17,347 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) [2024-09-17 18:16:17,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 577 transitions. [2024-09-17 18:16:17,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-17 18:16:17,350 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:17,351 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] [2024-09-17 18:16:17,351 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-17 18:16:17,351 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:17,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:17,352 INFO L85 PathProgramCache]: Analyzing trace with hash 887335745, now seen corresponding path program 1 times [2024-09-17 18:16:17,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:17,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442069701] [2024-09-17 18:16:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:17,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:17,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:17,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:17,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:17,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:17,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442069701] [2024-09-17 18:16:17,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442069701] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:17,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:17,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:16:17,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619815887] [2024-09-17 18:16:17,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:17,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:16:17,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:17,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:16:17,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:16:17,455 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) [2024-09-17 18:16:17,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:17,799 INFO L93 Difference]: Finished difference Result 795 states and 1334 transitions. [2024-09-17 18:16:17,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:16:17,800 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 [2024-09-17 18:16:17,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:17,806 INFO L225 Difference]: With dead ends: 795 [2024-09-17 18:16:17,806 INFO L226 Difference]: Without dead ends: 540 [2024-09-17 18:16:17,808 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 [2024-09-17 18:16:17,809 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 [2024-09-17 18:16:17,810 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] [2024-09-17 18:16:17,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-17 18:16:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 345. [2024-09-17 18:16:17,948 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) [2024-09-17 18:16:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 577 transitions. [2024-09-17 18:16:17,953 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 577 transitions. Word has length 28 [2024-09-17 18:16:17,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:17,954 INFO L474 AbstractCegarLoop]: Abstraction has 345 states and 577 transitions. [2024-09-17 18:16:17,954 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) [2024-09-17 18:16:17,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 577 transitions. [2024-09-17 18:16:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 18:16:17,956 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:17,956 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] [2024-09-17 18:16:17,957 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-17 18:16:17,957 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:17,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash 969267811, now seen corresponding path program 1 times [2024-09-17 18:16:17,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:17,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456636414] [2024-09-17 18:16:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:17,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:18,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:18,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:18,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:18,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:16:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:18,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:18,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456636414] [2024-09-17 18:16:18,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456636414] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:18,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:18,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-17 18:16:18,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173326995] [2024-09-17 18:16:18,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:18,106 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:16:18,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:16:18,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:16:18,107 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) [2024-09-17 18:16:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:18,479 INFO L93 Difference]: Finished difference Result 542 states and 924 transitions. [2024-09-17 18:16:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:16:18,480 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 [2024-09-17 18:16:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:18,485 INFO L225 Difference]: With dead ends: 542 [2024-09-17 18:16:18,485 INFO L226 Difference]: Without dead ends: 540 [2024-09-17 18:16:18,485 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 [2024-09-17 18:16:18,487 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 52 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-09-17 18:16:18,488 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] [2024-09-17 18:16:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-17 18:16:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 492. [2024-09-17 18:16:18,633 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) [2024-09-17 18:16:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 842 transitions. [2024-09-17 18:16:18,640 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 842 transitions. Word has length 31 [2024-09-17 18:16:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:18,640 INFO L474 AbstractCegarLoop]: Abstraction has 492 states and 842 transitions. [2024-09-17 18:16:18,640 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) [2024-09-17 18:16:18,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:18,641 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 842 transitions. [2024-09-17 18:16:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 18:16:18,642 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:18,642 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] [2024-09-17 18:16:18,643 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-17 18:16:18,643 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:18,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:18,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1109816421, now seen corresponding path program 1 times [2024-09-17 18:16:18,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:18,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030026067] [2024-09-17 18:16:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:18,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:18,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:18,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:18,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:16:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:18,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:18,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030026067] [2024-09-17 18:16:18,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030026067] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:18,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:18,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-17 18:16:18,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096481339] [2024-09-17 18:16:18,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:18,775 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:16:18,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:18,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:16:18,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:16:18,776 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) [2024-09-17 18:16:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:19,082 INFO L93 Difference]: Finished difference Result 562 states and 954 transitions. [2024-09-17 18:16:19,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:16:19,083 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 [2024-09-17 18:16:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:19,089 INFO L225 Difference]: With dead ends: 562 [2024-09-17 18:16:19,089 INFO L226 Difference]: Without dead ends: 560 [2024-09-17 18:16:19,090 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 [2024-09-17 18:16:19,090 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 [2024-09-17 18:16:19,091 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] [2024-09-17 18:16:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2024-09-17 18:16:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 499. [2024-09-17 18:16:19,231 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) [2024-09-17 18:16:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 851 transitions. [2024-09-17 18:16:19,238 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 851 transitions. Word has length 31 [2024-09-17 18:16:19,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:19,238 INFO L474 AbstractCegarLoop]: Abstraction has 499 states and 851 transitions. [2024-09-17 18:16:19,239 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) [2024-09-17 18:16:19,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 851 transitions. [2024-09-17 18:16:19,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-17 18:16:19,241 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:19,241 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] [2024-09-17 18:16:19,242 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-17 18:16:19,242 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:19,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:19,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1192529802, now seen corresponding path program 1 times [2024-09-17 18:16:19,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:19,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145110846] [2024-09-17 18:16:19,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:19,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:16:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:16:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:16:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:19,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:19,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145110846] [2024-09-17 18:16:19,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145110846] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:19,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:19,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-17 18:16:19,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827281584] [2024-09-17 18:16:19,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:19,363 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:16:19,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:19,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:16:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:16:19,365 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) [2024-09-17 18:16:19,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:19,689 INFO L93 Difference]: Finished difference Result 557 states and 928 transitions. [2024-09-17 18:16:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:16:19,689 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 [2024-09-17 18:16:19,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:19,695 INFO L225 Difference]: With dead ends: 557 [2024-09-17 18:16:19,695 INFO L226 Difference]: Without dead ends: 555 [2024-09-17 18:16:19,696 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 [2024-09-17 18:16:19,697 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 [2024-09-17 18:16:19,697 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] [2024-09-17 18:16:19,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2024-09-17 18:16:19,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 503. [2024-09-17 18:16:19,848 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) [2024-09-17 18:16:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 854 transitions. [2024-09-17 18:16:19,854 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 854 transitions. Word has length 41 [2024-09-17 18:16:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:19,855 INFO L474 AbstractCegarLoop]: Abstraction has 503 states and 854 transitions. [2024-09-17 18:16:19,855 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) [2024-09-17 18:16:19,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 854 transitions. [2024-09-17 18:16:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-17 18:16:19,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:19,857 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] [2024-09-17 18:16:19,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-17 18:16:19,857 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:19,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:19,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2122421222, now seen corresponding path program 1 times [2024-09-17 18:16:19,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:19,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342593564] [2024-09-17 18:16:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:19,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:16:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:19,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:19,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342593564] [2024-09-17 18:16:19,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342593564] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:19,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:19,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-17 18:16:19,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298629260] [2024-09-17 18:16:19,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:19,942 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:16:19,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:19,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:16:19,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:16:19,943 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) [2024-09-17 18:16:20,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:20,204 INFO L93 Difference]: Finished difference Result 534 states and 893 transitions. [2024-09-17 18:16:20,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 18:16:20,204 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 [2024-09-17 18:16:20,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:20,210 INFO L225 Difference]: With dead ends: 534 [2024-09-17 18:16:20,210 INFO L226 Difference]: Without dead ends: 532 [2024-09-17 18:16:20,210 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 [2024-09-17 18:16:20,211 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 [2024-09-17 18:16:20,211 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] [2024-09-17 18:16:20,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2024-09-17 18:16:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 511. [2024-09-17 18:16:20,323 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) [2024-09-17 18:16:20,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 860 transitions. [2024-09-17 18:16:20,329 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 860 transitions. Word has length 41 [2024-09-17 18:16:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:20,330 INFO L474 AbstractCegarLoop]: Abstraction has 511 states and 860 transitions. [2024-09-17 18:16:20,330 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) [2024-09-17 18:16:20,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 860 transitions. [2024-09-17 18:16:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-17 18:16:20,332 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:20,332 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] [2024-09-17 18:16:20,332 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-17 18:16:20,332 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:20,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:20,333 INFO L85 PathProgramCache]: Analyzing trace with hash 290316784, now seen corresponding path program 1 times [2024-09-17 18:16:20,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:20,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020389654] [2024-09-17 18:16:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:20,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:16:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:16:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:16:20,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020389654] [2024-09-17 18:16:20,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020389654] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:20,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:20,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-17 18:16:20,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038650034] [2024-09-17 18:16:20,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:20,442 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:16:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:16:20,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:16:20,443 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) [2024-09-17 18:16:20,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:20,703 INFO L93 Difference]: Finished difference Result 578 states and 966 transitions. [2024-09-17 18:16:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 18:16:20,704 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 [2024-09-17 18:16:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:20,709 INFO L225 Difference]: With dead ends: 578 [2024-09-17 18:16:20,710 INFO L226 Difference]: Without dead ends: 576 [2024-09-17 18:16:20,710 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 [2024-09-17 18:16:20,712 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 [2024-09-17 18:16:20,712 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] [2024-09-17 18:16:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-09-17 18:16:20,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 515. [2024-09-17 18:16:20,860 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) [2024-09-17 18:16:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 863 transitions. [2024-09-17 18:16:20,866 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 863 transitions. Word has length 53 [2024-09-17 18:16:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:20,866 INFO L474 AbstractCegarLoop]: Abstraction has 515 states and 863 transitions. [2024-09-17 18:16:20,867 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) [2024-09-17 18:16:20,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 863 transitions. [2024-09-17 18:16:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-17 18:16:20,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:20,869 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] [2024-09-17 18:16:20,869 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-17 18:16:20,869 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:20,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:20,870 INFO L85 PathProgramCache]: Analyzing trace with hash 822747500, now seen corresponding path program 1 times [2024-09-17 18:16:20,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:20,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818080272] [2024-09-17 18:16:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:20,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:16:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:16:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:16:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:16:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:16:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:16:20,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:20,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818080272] [2024-09-17 18:16:20,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818080272] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:20,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448176506] [2024-09-17 18:16:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:20,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:20,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:20,964 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) [2024-09-17 18:16:20,966 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:16:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:21,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-17 18:16:21,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-17 18:16:21,159 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:16:21,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448176506] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:21,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:16:21,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2024-09-17 18:16:21,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736317903] [2024-09-17 18:16:21,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:21,161 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:16:21,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:21,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:16:21,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:16:21,162 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) [2024-09-17 18:16:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:21,504 INFO L93 Difference]: Finished difference Result 932 states and 1539 transitions. [2024-09-17 18:16:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 18:16:21,505 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 [2024-09-17 18:16:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:21,511 INFO L225 Difference]: With dead ends: 932 [2024-09-17 18:16:21,512 INFO L226 Difference]: Without dead ends: 476 [2024-09-17 18:16:21,515 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 [2024-09-17 18:16:21,516 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:21,516 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 216 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:21,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2024-09-17 18:16:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 446. [2024-09-17 18:16:21,747 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) [2024-09-17 18:16:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 731 transitions. [2024-09-17 18:16:21,751 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 731 transitions. Word has length 61 [2024-09-17 18:16:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:21,752 INFO L474 AbstractCegarLoop]: Abstraction has 446 states and 731 transitions. [2024-09-17 18:16:21,752 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) [2024-09-17 18:16:21,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 731 transitions. [2024-09-17 18:16:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-17 18:16:21,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:21,754 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] [2024-09-17 18:16:21,774 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:21,955 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 [2024-09-17 18:16:21,955 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:21,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:21,956 INFO L85 PathProgramCache]: Analyzing trace with hash 968879790, now seen corresponding path program 1 times [2024-09-17 18:16:21,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:21,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377226863] [2024-09-17 18:16:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:21,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:16:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:16:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:16:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:16:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:16:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:16:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:16:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:16:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:16:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:16:22,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:22,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377226863] [2024-09-17 18:16:22,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377226863] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:22,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663615924] [2024-09-17 18:16:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:22,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:22,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:22,135 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) [2024-09-17 18:16:22,138 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:16:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:22,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:16:22,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-17 18:16:22,479 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:16:22,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663615924] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:22,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:16:22,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-09-17 18:16:22,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223565253] [2024-09-17 18:16:22,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:22,480 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:16:22,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:16:22,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-09-17 18:16:22,481 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) [2024-09-17 18:16:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:22,908 INFO L93 Difference]: Finished difference Result 813 states and 1310 transitions. [2024-09-17 18:16:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 18:16:22,909 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 [2024-09-17 18:16:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:22,913 INFO L225 Difference]: With dead ends: 813 [2024-09-17 18:16:22,914 INFO L226 Difference]: Without dead ends: 375 [2024-09-17 18:16:22,916 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 [2024-09-17 18:16:22,917 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 [2024-09-17 18:16:22,917 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] [2024-09-17 18:16:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-09-17 18:16:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 340. [2024-09-17 18:16:23,020 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) [2024-09-17 18:16:23,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 541 transitions. [2024-09-17 18:16:23,024 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 541 transitions. Word has length 83 [2024-09-17 18:16:23,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:23,026 INFO L474 AbstractCegarLoop]: Abstraction has 340 states and 541 transitions. [2024-09-17 18:16:23,026 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) [2024-09-17 18:16:23,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 541 transitions. [2024-09-17 18:16:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-17 18:16:23,028 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:23,028 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] [2024-09-17 18:16:23,045 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:23,228 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 [2024-09-17 18:16:23,229 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:23,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:23,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1787747476, now seen corresponding path program 1 times [2024-09-17 18:16:23,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:23,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631338456] [2024-09-17 18:16:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:23,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:16:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:16:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:16:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:16:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:16:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:16:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:16:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:16:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:16:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:16:23,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:23,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631338456] [2024-09-17 18:16:23,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631338456] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:23,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173087333] [2024-09-17 18:16:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:23,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:23,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:23,387 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) [2024-09-17 18:16:23,388 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:16:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:23,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 18:16:23,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-17 18:16:23,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:16:23,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173087333] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:23,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:16:23,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-17 18:16:23,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187051939] [2024-09-17 18:16:23,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:23,630 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:16:23,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:23,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:16:23,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-17 18:16:23,632 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) [2024-09-17 18:16:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:23,882 INFO L93 Difference]: Finished difference Result 639 states and 1012 transitions. [2024-09-17 18:16:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:16:23,883 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 [2024-09-17 18:16:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:23,887 INFO L225 Difference]: With dead ends: 639 [2024-09-17 18:16:23,887 INFO L226 Difference]: Without dead ends: 293 [2024-09-17 18:16:23,889 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 [2024-09-17 18:16:23,890 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 [2024-09-17 18:16:23,890 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] [2024-09-17 18:16:23,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-17 18:16:23,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 283. [2024-09-17 18:16:23,953 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) [2024-09-17 18:16:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 441 transitions. [2024-09-17 18:16:23,957 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 441 transitions. Word has length 83 [2024-09-17 18:16:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:23,957 INFO L474 AbstractCegarLoop]: Abstraction has 283 states and 441 transitions. [2024-09-17 18:16:23,958 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) [2024-09-17 18:16:23,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:23,958 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 441 transitions. [2024-09-17 18:16:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-17 18:16:23,959 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:23,960 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] [2024-09-17 18:16:23,978 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 18:16:24,163 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 [2024-09-17 18:16:24,164 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:24,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:24,164 INFO L85 PathProgramCache]: Analyzing trace with hash -680780915, now seen corresponding path program 1 times [2024-09-17 18:16:24,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:24,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518689909] [2024-09-17 18:16:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:24,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:16:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:16:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:16:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:16:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:16:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:16:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:16:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-17 18:16:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2024-09-17 18:16:24,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:24,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518689909] [2024-09-17 18:16:24,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518689909] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:24,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222708046] [2024-09-17 18:16:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:24,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:24,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:24,273 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) [2024-09-17 18:16:24,275 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:16:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:24,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-17 18:16:24,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-17 18:16:24,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2024-09-17 18:16:24,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222708046] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:24,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:24,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-09-17 18:16:24,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051761775] [2024-09-17 18:16:24,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:24,558 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-17 18:16:24,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:24,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-17 18:16:24,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:16:24,559 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) [2024-09-17 18:16:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:25,628 INFO L93 Difference]: Finished difference Result 571 states and 876 transitions. [2024-09-17 18:16:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:16:25,628 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 [2024-09-17 18:16:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:25,632 INFO L225 Difference]: With dead ends: 571 [2024-09-17 18:16:25,633 INFO L226 Difference]: Without dead ends: 343 [2024-09-17 18:16:25,634 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 [2024-09-17 18:16:25,635 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, 0.6s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:25,635 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 731 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-17 18:16:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-09-17 18:16:25,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 237. [2024-09-17 18:16:25,697 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) [2024-09-17 18:16:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2024-09-17 18:16:25,700 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 88 [2024-09-17 18:16:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:25,700 INFO L474 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2024-09-17 18:16:25,701 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) [2024-09-17 18:16:25,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2024-09-17 18:16:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-17 18:16:25,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:25,702 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] [2024-09-17 18:16:25,720 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 18:16:25,903 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 [2024-09-17 18:16:25,903 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:25,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:25,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1903110671, now seen corresponding path program 1 times [2024-09-17 18:16:25,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:25,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461721566] [2024-09-17 18:16:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:25,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:16:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:16:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:16:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:16:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:16:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:16:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:16:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-17 18:16:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:16:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:16:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:16:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-17 18:16:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-17 18:16:26,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:26,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461721566] [2024-09-17 18:16:26,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461721566] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:26,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041276356] [2024-09-17 18:16:26,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:26,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:26,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:26,089 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) [2024-09-17 18:16:26,092 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:16:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:26,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 18:16:26,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-17 18:16:26,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-17 18:16:26,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041276356] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:26,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:26,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-09-17 18:16:26,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111567716] [2024-09-17 18:16:26,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:26,578 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:16:26,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:26,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:16:26,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:16:26,580 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) [2024-09-17 18:16:28,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:28,892 INFO L93 Difference]: Finished difference Result 800 states and 1252 transitions. [2024-09-17 18:16:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-17 18:16:28,892 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 [2024-09-17 18:16:28,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:28,897 INFO L225 Difference]: With dead ends: 800 [2024-09-17 18:16:28,897 INFO L226 Difference]: Without dead ends: 469 [2024-09-17 18:16:28,900 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 [2024-09-17 18:16:28,901 INFO L434 NwaCegarLoop]: 156 mSDtfsCounter, 371 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:28,901 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1097 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-17 18:16:28,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-09-17 18:16:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 372. [2024-09-17 18:16:29,034 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) [2024-09-17 18:16:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 582 transitions. [2024-09-17 18:16:29,044 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 582 transitions. Word has length 110 [2024-09-17 18:16:29,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:29,045 INFO L474 AbstractCegarLoop]: Abstraction has 372 states and 582 transitions. [2024-09-17 18:16:29,046 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) [2024-09-17 18:16:29,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:29,046 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 582 transitions. [2024-09-17 18:16:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-17 18:16:29,049 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:29,049 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] [2024-09-17 18:16:29,068 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 18:16:29,253 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 [2024-09-17 18:16:29,254 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:29,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:29,255 INFO L85 PathProgramCache]: Analyzing trace with hash -853516595, now seen corresponding path program 1 times [2024-09-17 18:16:29,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:29,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953398229] [2024-09-17 18:16:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:29,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:16:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:16:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:16:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:16:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:16:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:16:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:16:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-17 18:16:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:16:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:16:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:16:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-17 18:16:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-17 18:16:29,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953398229] [2024-09-17 18:16:29,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953398229] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:29,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220422285] [2024-09-17 18:16:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:29,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:29,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:29,420 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) [2024-09-17 18:16:29,422 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:16:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:29,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:16:29,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-17 18:16:29,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-17 18:16:29,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220422285] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:29,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:29,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-09-17 18:16:29,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234645400] [2024-09-17 18:16:29,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:29,697 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-17 18:16:29,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:29,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-17 18:16:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-17 18:16:29,701 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) [2024-09-17 18:16:30,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:30,100 INFO L93 Difference]: Finished difference Result 434 states and 675 transitions. [2024-09-17 18:16:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 18:16:30,101 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 [2024-09-17 18:16:30,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:30,105 INFO L225 Difference]: With dead ends: 434 [2024-09-17 18:16:30,105 INFO L226 Difference]: Without dead ends: 432 [2024-09-17 18:16:30,106 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 [2024-09-17 18:16:30,107 INFO L434 NwaCegarLoop]: 72 mSDtfsCounter, 58 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-09-17 18:16:30,107 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] [2024-09-17 18:16:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2024-09-17 18:16:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 376. [2024-09-17 18:16:30,246 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) [2024-09-17 18:16:30,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 585 transitions. [2024-09-17 18:16:30,251 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 585 transitions. Word has length 110 [2024-09-17 18:16:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:30,252 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 585 transitions. [2024-09-17 18:16:30,252 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) [2024-09-17 18:16:30,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 585 transitions. [2024-09-17 18:16:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-17 18:16:30,256 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:30,256 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] [2024-09-17 18:16:30,273 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 18:16:30,457 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 [2024-09-17 18:16:30,458 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:30,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:30,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1133746567, now seen corresponding path program 2 times [2024-09-17 18:16:30,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:30,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216777904] [2024-09-17 18:16:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:30,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:16:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:16:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:16:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:16:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:16:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:16:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:16:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:16:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-17 18:16:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:16:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:16:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:16:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-17 18:16:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-17 18:16:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 18 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2024-09-17 18:16:30,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:30,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216777904] [2024-09-17 18:16:30,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216777904] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:30,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106466934] [2024-09-17 18:16:30,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:16:30,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:30,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:30,635 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) [2024-09-17 18:16:30,636 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:16:30,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:16:30,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:30,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 18:16:30,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-17 18:16:30,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-17 18:16:31,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106466934] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:31,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:31,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 19 [2024-09-17 18:16:31,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244111892] [2024-09-17 18:16:31,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:31,096 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 18:16:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 18:16:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:16:31,098 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) [2024-09-17 18:16:32,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:32,369 INFO L93 Difference]: Finished difference Result 698 states and 1108 transitions. [2024-09-17 18:16:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:16:32,370 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 [2024-09-17 18:16:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:32,372 INFO L225 Difference]: With dead ends: 698 [2024-09-17 18:16:32,372 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 18:16:32,376 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 [2024-09-17 18:16:32,376 INFO L434 NwaCegarLoop]: 78 mSDtfsCounter, 281 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:32,378 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 586 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-17 18:16:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 18:16:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 18:16:32,383 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) [2024-09-17 18:16:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 18:16:32,384 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2024-09-17 18:16:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:32,385 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 18:16:32,385 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) [2024-09-17 18:16:32,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 18:16:32,386 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 18:16:32,388 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-17 18:16:32,408 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 18:16:32,594 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 [2024-09-17 18:16:32,598 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] [2024-09-17 18:16:32,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.