./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 [2024-09-18 15:36:08,172 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:36:08,228 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:36:08,232 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:36:08,233 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:36:08,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:36:08,268 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:36:08,269 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:36:08,270 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:36:08,271 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:36:08,271 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:36:08,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:36:08,272 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:36:08,273 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:36:08,273 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:36:08,274 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:36:08,274 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:36:08,274 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:36:08,275 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:36:08,275 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:36:08,275 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:36:08,279 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:36:08,279 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:36:08,280 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:36:08,280 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:36:08,280 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:36:08,280 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:36:08,281 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:36:08,281 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:36:08,281 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:36:08,281 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:36:08,282 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:36:08,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:36:08,282 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:36:08,282 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:36:08,283 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:36:08,283 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:36:08,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:36:08,283 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:36:08,284 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:36:08,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:36:08,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:36:08,285 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e7c8e5dc2a9e8f11b25d1bb9948f05f37b9553e3dc9f8bd8213088dea43cb37 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:36:08,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:36:08,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:36:08,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:36:08,573 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:36:08,574 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:36:08,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/heapsort.i [2024-09-18 15:36:09,967 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:36:10,155 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:36:10,156 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/heapsort.i [2024-09-18 15:36:10,163 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b7a5999e8/0f6ade74a9de4d00a661c826e53579dc/FLAG361065fb5 [2024-09-18 15:36:10,177 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b7a5999e8/0f6ade74a9de4d00a661c826e53579dc [2024-09-18 15:36:10,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:36:10,180 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:36:10,182 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:36:10,182 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:36:10,186 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:36:10,187 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,188 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@453cbea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10, skipping insertion in model container [2024-09-18 15:36:10,188 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,207 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:36:10,397 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] [2024-09-18 15:36:10,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:36:10,438 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:36:10,450 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] [2024-09-18 15:36:10,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:36:10,486 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:36:10,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10 WrapperNode [2024-09-18 15:36:10,487 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:36:10,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:36:10,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:36:10,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:36:10,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,504 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,511 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:36:10,511 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:36:10,513 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:36:10,514 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:36:10,514 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:36:10,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,524 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,537 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-18 15:36:10,537 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,538 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,542 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,553 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,553 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,555 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:36:10,556 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:36:10,556 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:36:10,556 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:36:10,557 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (1/1) ... [2024-09-18 15:36:10,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:36:10,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:10,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-18 15:36:10,595 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-18 15:36:10,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:36:10,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:36:10,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:36:10,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:36:10,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:36:10,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:36:10,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:36:10,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:36:10,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:36:10,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:36:10,715 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:36:10,720 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:36:10,918 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-18 15:36:10,918 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:36:10,937 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:36:10,937 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 15:36:10,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:36:10 BoogieIcfgContainer [2024-09-18 15:36:10,938 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:36:10,940 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:36:10,940 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:36:10,944 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:36:10,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:36:10" (1/3) ... [2024-09-18 15:36:10,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31526903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:36:10, skipping insertion in model container [2024-09-18 15:36:10,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:36:10" (2/3) ... [2024-09-18 15:36:10,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31526903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:36:10, skipping insertion in model container [2024-09-18 15:36:10,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:36:10" (3/3) ... [2024-09-18 15:36:10,947 INFO L112 eAbstractionObserver]: Analyzing ICFG heapsort.i [2024-09-18 15:36:10,967 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:36:10,968 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:36:11,021 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:36:11,026 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;@a08198c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:36:11,027 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:36:11,031 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) [2024-09-18 15:36:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-18 15:36:11,039 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:11,039 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:11,040 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:11,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash 855475308, now seen corresponding path program 1 times [2024-09-18 15:36:11,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:11,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791211247] [2024-09-18 15:36:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:11,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:11,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:11,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:11,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791211247] [2024-09-18 15:36:11,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791211247] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:11,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:11,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 15:36:11,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925423571] [2024-09-18 15:36:11,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:11,407 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:36:11,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:11,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:36:11,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:36:11,428 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) [2024-09-18 15:36:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:11,735 INFO L93 Difference]: Finished difference Result 113 states and 211 transitions. [2024-09-18 15:36:11,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:36:11,738 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 [2024-09-18 15:36:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:11,757 INFO L225 Difference]: With dead ends: 113 [2024-09-18 15:36:11,757 INFO L226 Difference]: Without dead ends: 69 [2024-09-18 15:36:11,763 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:36:11,767 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 [2024-09-18 15:36:11,769 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] [2024-09-18 15:36:11,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-18 15:36:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2024-09-18 15:36:11,849 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) [2024-09-18 15:36:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 91 transitions. [2024-09-18 15:36:11,856 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 91 transitions. Word has length 14 [2024-09-18 15:36:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:11,856 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 91 transitions. [2024-09-18 15:36:11,856 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) [2024-09-18 15:36:11,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 91 transitions. [2024-09-18 15:36:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-18 15:36:11,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:11,859 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:11,859 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:36:11,861 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:11,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:11,862 INFO L85 PathProgramCache]: Analyzing trace with hash 843231207, now seen corresponding path program 1 times [2024-09-18 15:36:11,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:11,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137865523] [2024-09-18 15:36:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:11,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:12,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:12,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:12,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137865523] [2024-09-18 15:36:12,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137865523] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:12,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:12,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 15:36:12,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452829293] [2024-09-18 15:36:12,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:12,035 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:36:12,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:12,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:36:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:36:12,038 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) [2024-09-18 15:36:12,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:12,252 INFO L93 Difference]: Finished difference Result 117 states and 183 transitions. [2024-09-18 15:36:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:36:12,253 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 [2024-09-18 15:36:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:12,256 INFO L225 Difference]: With dead ends: 117 [2024-09-18 15:36:12,256 INFO L226 Difference]: Without dead ends: 115 [2024-09-18 15:36:12,257 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 [2024-09-18 15:36:12,258 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 [2024-09-18 15:36:12,258 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] [2024-09-18 15:36:12,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-18 15:36:12,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2024-09-18 15:36:12,281 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) [2024-09-18 15:36:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 167 transitions. [2024-09-18 15:36:12,284 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 167 transitions. Word has length 14 [2024-09-18 15:36:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:12,284 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 167 transitions. [2024-09-18 15:36:12,284 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) [2024-09-18 15:36:12,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 167 transitions. [2024-09-18 15:36:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-18 15:36:12,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:12,286 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:12,286 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:36:12,286 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:12,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:12,287 INFO L85 PathProgramCache]: Analyzing trace with hash 842919880, now seen corresponding path program 1 times [2024-09-18 15:36:12,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:12,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520928444] [2024-09-18 15:36:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:12,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:12,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:12,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:12,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520928444] [2024-09-18 15:36:12,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520928444] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:12,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:12,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 15:36:12,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504497539] [2024-09-18 15:36:12,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:12,383 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:36:12,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:12,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:36:12,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:36:12,384 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) [2024-09-18 15:36:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:12,578 INFO L93 Difference]: Finished difference Result 161 states and 257 transitions. [2024-09-18 15:36:12,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:36:12,578 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 [2024-09-18 15:36:12,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:12,581 INFO L225 Difference]: With dead ends: 161 [2024-09-18 15:36:12,581 INFO L226 Difference]: Without dead ends: 159 [2024-09-18 15:36:12,581 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 [2024-09-18 15:36:12,582 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 31 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:12,583 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 200 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:36:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-18 15:36:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2024-09-18 15:36:12,627 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) [2024-09-18 15:36:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 230 transitions. [2024-09-18 15:36:12,631 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 230 transitions. Word has length 19 [2024-09-18 15:36:12,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:12,632 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 230 transitions. [2024-09-18 15:36:12,632 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) [2024-09-18 15:36:12,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 230 transitions. [2024-09-18 15:36:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-18 15:36:12,633 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:12,633 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:12,634 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 15:36:12,634 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:12,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:12,634 INFO L85 PathProgramCache]: Analyzing trace with hash 303375166, now seen corresponding path program 1 times [2024-09-18 15:36:12,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:12,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136947769] [2024-09-18 15:36:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:12,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:12,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:12,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:12,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:12,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:12,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136947769] [2024-09-18 15:36:12,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136947769] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:12,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:12,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-18 15:36:12,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907896267] [2024-09-18 15:36:12,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:12,804 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:36:12,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:12,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:36:12,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:36:12,804 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) [2024-09-18 15:36:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:13,076 INFO L93 Difference]: Finished difference Result 208 states and 342 transitions. [2024-09-18 15:36:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:36:13,077 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 [2024-09-18 15:36:13,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:13,086 INFO L225 Difference]: With dead ends: 208 [2024-09-18 15:36:13,087 INFO L226 Difference]: Without dead ends: 206 [2024-09-18 15:36:13,087 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 [2024-09-18 15:36:13,089 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 [2024-09-18 15:36:13,092 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] [2024-09-18 15:36:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-09-18 15:36:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2024-09-18 15:36:13,164 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) [2024-09-18 15:36:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 337 transitions. [2024-09-18 15:36:13,171 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 337 transitions. Word has length 19 [2024-09-18 15:36:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:13,171 INFO L474 AbstractCegarLoop]: Abstraction has 203 states and 337 transitions. [2024-09-18 15:36:13,171 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) [2024-09-18 15:36:13,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 337 transitions. [2024-09-18 15:36:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-18 15:36:13,173 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:13,173 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:36:13,173 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-18 15:36:13,173 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:13,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:13,173 INFO L85 PathProgramCache]: Analyzing trace with hash -283430848, now seen corresponding path program 1 times [2024-09-18 15:36:13,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:13,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840407891] [2024-09-18 15:36:13,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:13,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:36:13,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:13,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840407891] [2024-09-18 15:36:13,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840407891] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:13,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:13,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 15:36:13,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624490644] [2024-09-18 15:36:13,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:13,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 15:36:13,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:13,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 15:36:13,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:36:13,202 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) [2024-09-18 15:36:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:13,285 INFO L93 Difference]: Finished difference Result 387 states and 649 transitions. [2024-09-18 15:36:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 15:36:13,286 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 [2024-09-18 15:36:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:13,290 INFO L225 Difference]: With dead ends: 387 [2024-09-18 15:36:13,290 INFO L226 Difference]: Without dead ends: 305 [2024-09-18 15:36:13,291 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 [2024-09-18 15:36:13,292 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 [2024-09-18 15:36:13,293 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] [2024-09-18 15:36:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-09-18 15:36:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 250. [2024-09-18 15:36:13,383 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) [2024-09-18 15:36:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 421 transitions. [2024-09-18 15:36:13,387 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 421 transitions. Word has length 19 [2024-09-18 15:36:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:13,387 INFO L474 AbstractCegarLoop]: Abstraction has 250 states and 421 transitions. [2024-09-18 15:36:13,387 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) [2024-09-18 15:36:13,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 421 transitions. [2024-09-18 15:36:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-18 15:36:13,390 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:13,390 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] [2024-09-18 15:36:13,390 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-18 15:36:13,391 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:13,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:13,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1858602097, now seen corresponding path program 1 times [2024-09-18 15:36:13,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:13,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242283163] [2024-09-18 15:36:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:13,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:36:13,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:13,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242283163] [2024-09-18 15:36:13,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242283163] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:13,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:13,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 15:36:13,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461990417] [2024-09-18 15:36:13,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:13,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:36:13,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:13,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:36:13,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:36:13,482 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) [2024-09-18 15:36:13,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:13,662 INFO L93 Difference]: Finished difference Result 338 states and 568 transitions. [2024-09-18 15:36:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:36:13,663 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 [2024-09-18 15:36:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:13,667 INFO L225 Difference]: With dead ends: 338 [2024-09-18 15:36:13,667 INFO L226 Difference]: Without dead ends: 336 [2024-09-18 15:36:13,667 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 [2024-09-18 15:36:13,669 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 [2024-09-18 15:36:13,673 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] [2024-09-18 15:36:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-09-18 15:36:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 304. [2024-09-18 15:36:13,803 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) [2024-09-18 15:36:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 511 transitions. [2024-09-18 15:36:13,809 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 511 transitions. Word has length 26 [2024-09-18 15:36:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:13,809 INFO L474 AbstractCegarLoop]: Abstraction has 304 states and 511 transitions. [2024-09-18 15:36:13,810 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) [2024-09-18 15:36:13,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 511 transitions. [2024-09-18 15:36:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-18 15:36:13,815 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:13,816 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] [2024-09-18 15:36:13,816 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-18 15:36:13,816 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:13,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1261754835, now seen corresponding path program 1 times [2024-09-18 15:36:13,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:13,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117589091] [2024-09-18 15:36:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:13,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:36:13,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:36:13,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:13,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117589091] [2024-09-18 15:36:13,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117589091] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:13,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:13,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-18 15:36:13,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738455169] [2024-09-18 15:36:13,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:13,910 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:36:13,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:13,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:36:13,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:36:13,911 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) [2024-09-18 15:36:14,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:14,146 INFO L93 Difference]: Finished difference Result 370 states and 611 transitions. [2024-09-18 15:36:14,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:36:14,147 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 [2024-09-18 15:36:14,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:14,151 INFO L225 Difference]: With dead ends: 370 [2024-09-18 15:36:14,151 INFO L226 Difference]: Without dead ends: 368 [2024-09-18 15:36:14,153 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 [2024-09-18 15:36:14,154 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 [2024-09-18 15:36:14,155 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] [2024-09-18 15:36:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2024-09-18 15:36:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 344. [2024-09-18 15:36:14,258 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) [2024-09-18 15:36:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 577 transitions. [2024-09-18 15:36:14,263 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 577 transitions. Word has length 29 [2024-09-18 15:36:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:14,263 INFO L474 AbstractCegarLoop]: Abstraction has 344 states and 577 transitions. [2024-09-18 15:36:14,264 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) [2024-09-18 15:36:14,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 577 transitions. [2024-09-18 15:36:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-18 15:36:14,266 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:14,266 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] [2024-09-18 15:36:14,266 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-18 15:36:14,267 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:14,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:14,267 INFO L85 PathProgramCache]: Analyzing trace with hash 887335745, now seen corresponding path program 1 times [2024-09-18 15:36:14,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:14,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093051451] [2024-09-18 15:36:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:14,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:36:14,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:14,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093051451] [2024-09-18 15:36:14,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093051451] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:14,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:14,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:36:14,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262042485] [2024-09-18 15:36:14,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:14,363 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:36:14,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:14,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:36:14,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:36:14,363 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) [2024-09-18 15:36:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:14,724 INFO L93 Difference]: Finished difference Result 795 states and 1334 transitions. [2024-09-18 15:36:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:36:14,724 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 [2024-09-18 15:36:14,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:14,734 INFO L225 Difference]: With dead ends: 795 [2024-09-18 15:36:14,734 INFO L226 Difference]: Without dead ends: 540 [2024-09-18 15:36:14,735 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 [2024-09-18 15:36:14,736 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 [2024-09-18 15:36:14,736 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] [2024-09-18 15:36:14,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-18 15:36:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 345. [2024-09-18 15:36:14,815 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) [2024-09-18 15:36:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 577 transitions. [2024-09-18 15:36:14,821 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 577 transitions. Word has length 28 [2024-09-18 15:36:14,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:14,821 INFO L474 AbstractCegarLoop]: Abstraction has 345 states and 577 transitions. [2024-09-18 15:36:14,822 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) [2024-09-18 15:36:14,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 577 transitions. [2024-09-18 15:36:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 15:36:14,823 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:14,823 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] [2024-09-18 15:36:14,824 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-18 15:36:14,825 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:14,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:14,825 INFO L85 PathProgramCache]: Analyzing trace with hash 969267811, now seen corresponding path program 1 times [2024-09-18 15:36:14,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:14,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645396771] [2024-09-18 15:36:14,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:14,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:36:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:36:14,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:14,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645396771] [2024-09-18 15:36:14,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645396771] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:14,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:14,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-18 15:36:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415275843] [2024-09-18 15:36:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:14,970 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:36:14,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:36:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:36:14,971 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) [2024-09-18 15:36:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:15,290 INFO L93 Difference]: Finished difference Result 542 states and 924 transitions. [2024-09-18 15:36:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:36:15,291 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 [2024-09-18 15:36:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:15,296 INFO L225 Difference]: With dead ends: 542 [2024-09-18 15:36:15,297 INFO L226 Difference]: Without dead ends: 540 [2024-09-18 15:36:15,297 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 [2024-09-18 15:36:15,299 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 52 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:15,300 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] [2024-09-18 15:36:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-09-18 15:36:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 492. [2024-09-18 15:36:15,453 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) [2024-09-18 15:36:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 842 transitions. [2024-09-18 15:36:15,458 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 842 transitions. Word has length 31 [2024-09-18 15:36:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:15,458 INFO L474 AbstractCegarLoop]: Abstraction has 492 states and 842 transitions. [2024-09-18 15:36:15,458 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) [2024-09-18 15:36:15,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 842 transitions. [2024-09-18 15:36:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-18 15:36:15,459 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:15,459 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] [2024-09-18 15:36:15,459 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-18 15:36:15,459 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:15,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1109816421, now seen corresponding path program 1 times [2024-09-18 15:36:15,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:15,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544105976] [2024-09-18 15:36:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:15,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:36:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:36:15,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:15,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544105976] [2024-09-18 15:36:15,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544105976] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:15,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:15,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-18 15:36:15,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182724078] [2024-09-18 15:36:15,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:15,565 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:36:15,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:15,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:36:15,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:36:15,566 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) [2024-09-18 15:36:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:15,845 INFO L93 Difference]: Finished difference Result 562 states and 954 transitions. [2024-09-18 15:36:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:36:15,845 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 [2024-09-18 15:36:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:15,850 INFO L225 Difference]: With dead ends: 562 [2024-09-18 15:36:15,851 INFO L226 Difference]: Without dead ends: 560 [2024-09-18 15:36:15,851 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 [2024-09-18 15:36:15,852 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 [2024-09-18 15:36:15,852 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] [2024-09-18 15:36:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2024-09-18 15:36:15,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 499. [2024-09-18 15:36:15,964 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) [2024-09-18 15:36:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 851 transitions. [2024-09-18 15:36:15,970 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 851 transitions. Word has length 31 [2024-09-18 15:36:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:15,970 INFO L474 AbstractCegarLoop]: Abstraction has 499 states and 851 transitions. [2024-09-18 15:36:15,971 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) [2024-09-18 15:36:15,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 851 transitions. [2024-09-18 15:36:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-18 15:36:15,972 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:15,972 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] [2024-09-18 15:36:15,972 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-18 15:36:15,973 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:15,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:15,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1192529802, now seen corresponding path program 1 times [2024-09-18 15:36:15,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:15,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27183485] [2024-09-18 15:36:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:15,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:36:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-18 15:36:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:36:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-18 15:36:16,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:16,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27183485] [2024-09-18 15:36:16,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27183485] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:16,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:16,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-18 15:36:16,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058585054] [2024-09-18 15:36:16,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:16,084 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:36:16,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:16,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:36:16,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:36:16,085 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) [2024-09-18 15:36:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:16,377 INFO L93 Difference]: Finished difference Result 557 states and 928 transitions. [2024-09-18 15:36:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:36:16,377 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 [2024-09-18 15:36:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:16,382 INFO L225 Difference]: With dead ends: 557 [2024-09-18 15:36:16,383 INFO L226 Difference]: Without dead ends: 555 [2024-09-18 15:36:16,383 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 [2024-09-18 15:36:16,384 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 [2024-09-18 15:36:16,384 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] [2024-09-18 15:36:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2024-09-18 15:36:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 503. [2024-09-18 15:36:16,509 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) [2024-09-18 15:36:16,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 854 transitions. [2024-09-18 15:36:16,514 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 854 transitions. Word has length 41 [2024-09-18 15:36:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:16,514 INFO L474 AbstractCegarLoop]: Abstraction has 503 states and 854 transitions. [2024-09-18 15:36:16,514 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) [2024-09-18 15:36:16,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 854 transitions. [2024-09-18 15:36:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-18 15:36:16,516 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:16,516 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] [2024-09-18 15:36:16,516 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-18 15:36:16,516 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:16,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:16,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2122421222, now seen corresponding path program 1 times [2024-09-18 15:36:16,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:16,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694061583] [2024-09-18 15:36:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:16,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:36:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:36:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 15:36:16,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:16,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694061583] [2024-09-18 15:36:16,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694061583] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:16,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:16,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-18 15:36:16,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964205242] [2024-09-18 15:36:16,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:16,593 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:36:16,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:16,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:36:16,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:36:16,594 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) [2024-09-18 15:36:16,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:16,887 INFO L93 Difference]: Finished difference Result 534 states and 893 transitions. [2024-09-18 15:36:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:36:16,888 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 [2024-09-18 15:36:16,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:16,892 INFO L225 Difference]: With dead ends: 534 [2024-09-18 15:36:16,893 INFO L226 Difference]: Without dead ends: 532 [2024-09-18 15:36:16,893 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 [2024-09-18 15:36:16,894 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 [2024-09-18 15:36:16,894 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] [2024-09-18 15:36:16,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2024-09-18 15:36:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 511. [2024-09-18 15:36:17,002 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) [2024-09-18 15:36:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 860 transitions. [2024-09-18 15:36:17,006 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 860 transitions. Word has length 41 [2024-09-18 15:36:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:17,007 INFO L474 AbstractCegarLoop]: Abstraction has 511 states and 860 transitions. [2024-09-18 15:36:17,007 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) [2024-09-18 15:36:17,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 860 transitions. [2024-09-18 15:36:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-18 15:36:17,009 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:17,009 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] [2024-09-18 15:36:17,009 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-18 15:36:17,009 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:17,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash 290316784, now seen corresponding path program 1 times [2024-09-18 15:36:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:17,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537255915] [2024-09-18 15:36:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:17,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:36:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:36:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:36:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 15:36:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-18 15:36:17,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:17,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537255915] [2024-09-18 15:36:17,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537255915] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:17,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:36:17,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-18 15:36:17,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118153929] [2024-09-18 15:36:17,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:17,114 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:36:17,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:17,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:36:17,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:36:17,115 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) [2024-09-18 15:36:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:17,350 INFO L93 Difference]: Finished difference Result 578 states and 966 transitions. [2024-09-18 15:36:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:36:17,351 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 [2024-09-18 15:36:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:17,356 INFO L225 Difference]: With dead ends: 578 [2024-09-18 15:36:17,356 INFO L226 Difference]: Without dead ends: 576 [2024-09-18 15:36:17,357 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 [2024-09-18 15:36:17,358 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 [2024-09-18 15:36:17,358 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] [2024-09-18 15:36:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-09-18 15:36:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 515. [2024-09-18 15:36:17,488 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) [2024-09-18 15:36:17,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 863 transitions. [2024-09-18 15:36:17,497 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 863 transitions. Word has length 53 [2024-09-18 15:36:17,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:17,497 INFO L474 AbstractCegarLoop]: Abstraction has 515 states and 863 transitions. [2024-09-18 15:36:17,498 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) [2024-09-18 15:36:17,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:17,498 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 863 transitions. [2024-09-18 15:36:17,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-18 15:36:17,499 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:17,500 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] [2024-09-18 15:36:17,500 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-09-18 15:36:17,500 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:17,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash 822747500, now seen corresponding path program 1 times [2024-09-18 15:36:17,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:17,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5661745] [2024-09-18 15:36:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-18 15:36:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-18 15:36:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:36:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:36:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 15:36:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 15:36:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-18 15:36:17,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:17,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5661745] [2024-09-18 15:36:17,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5661745] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:17,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347457536] [2024-09-18 15:36:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:17,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:17,585 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:17,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:36:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:17,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-18 15:36:17,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-18 15:36:17,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:36:17,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347457536] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:17,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:36:17,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2024-09-18 15:36:17,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768327878] [2024-09-18 15:36:17,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:17,809 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:36:17,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:17,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:36:17,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:36:17,810 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) [2024-09-18 15:36:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:18,160 INFO L93 Difference]: Finished difference Result 932 states and 1539 transitions. [2024-09-18 15:36:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:36:18,160 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 [2024-09-18 15:36:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:18,165 INFO L225 Difference]: With dead ends: 932 [2024-09-18 15:36:18,166 INFO L226 Difference]: Without dead ends: 476 [2024-09-18 15:36:18,170 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 [2024-09-18 15:36:18,171 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 [2024-09-18 15:36:18,171 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] [2024-09-18 15:36:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2024-09-18 15:36:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 446. [2024-09-18 15:36:18,286 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) [2024-09-18 15:36:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 731 transitions. [2024-09-18 15:36:18,291 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 731 transitions. Word has length 61 [2024-09-18 15:36:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:18,291 INFO L474 AbstractCegarLoop]: Abstraction has 446 states and 731 transitions. [2024-09-18 15:36:18,291 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) [2024-09-18 15:36:18,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 731 transitions. [2024-09-18 15:36:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-18 15:36:18,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:18,294 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] [2024-09-18 15:36:18,312 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:36:18,498 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 [2024-09-18 15:36:18,499 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:18,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:18,499 INFO L85 PathProgramCache]: Analyzing trace with hash 968879790, now seen corresponding path program 1 times [2024-09-18 15:36:18,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:18,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389532556] [2024-09-18 15:36:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:18,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:36:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-18 15:36:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:36:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:36:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-18 15:36:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-18 15:36:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-18 15:36:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:36:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-18 15:36:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-18 15:36:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-18 15:36:18,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:18,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389532556] [2024-09-18 15:36:18,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389532556] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:18,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189426671] [2024-09-18 15:36:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:18,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:18,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:18,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:18,678 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:36:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:18,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 15:36:18,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-18 15:36:19,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:36:19,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189426671] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:19,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:36:19,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-09-18 15:36:19,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029604135] [2024-09-18 15:36:19,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:19,036 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-18 15:36:19,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:19,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-18 15:36:19,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:36:19,037 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) [2024-09-18 15:36:19,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:19,491 INFO L93 Difference]: Finished difference Result 813 states and 1310 transitions. [2024-09-18 15:36:19,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-18 15:36:19,492 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 [2024-09-18 15:36:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:19,496 INFO L225 Difference]: With dead ends: 813 [2024-09-18 15:36:19,496 INFO L226 Difference]: Without dead ends: 375 [2024-09-18 15:36:19,500 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 [2024-09-18 15:36:19,500 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 [2024-09-18 15:36:19,500 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] [2024-09-18 15:36:19,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-09-18 15:36:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 340. [2024-09-18 15:36:19,594 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) [2024-09-18 15:36:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 541 transitions. [2024-09-18 15:36:19,598 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 541 transitions. Word has length 83 [2024-09-18 15:36:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:19,598 INFO L474 AbstractCegarLoop]: Abstraction has 340 states and 541 transitions. [2024-09-18 15:36:19,598 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) [2024-09-18 15:36:19,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:19,599 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 541 transitions. [2024-09-18 15:36:19,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-18 15:36:19,600 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:19,600 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] [2024-09-18 15:36:19,618 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 15:36:19,801 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 [2024-09-18 15:36:19,801 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:19,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:19,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1787747476, now seen corresponding path program 1 times [2024-09-18 15:36:19,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:19,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840817028] [2024-09-18 15:36:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:19,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-18 15:36:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-18 15:36:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-18 15:36:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:36:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-18 15:36:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-18 15:36:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-18 15:36:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:36:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-18 15:36:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-18 15:36:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-18 15:36:19,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:19,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840817028] [2024-09-18 15:36:19,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840817028] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:19,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152393665] [2024-09-18 15:36:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:19,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:19,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:19,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:19,946 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:36:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-18 15:36:20,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2024-09-18 15:36:20,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:36:20,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152393665] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:36:20,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:36:20,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-18 15:36:20,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378252583] [2024-09-18 15:36:20,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:36:20,183 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 15:36:20,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:20,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 15:36:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:36:20,184 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) [2024-09-18 15:36:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:20,404 INFO L93 Difference]: Finished difference Result 639 states and 1012 transitions. [2024-09-18 15:36:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:36:20,405 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 [2024-09-18 15:36:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:20,408 INFO L225 Difference]: With dead ends: 639 [2024-09-18 15:36:20,408 INFO L226 Difference]: Without dead ends: 293 [2024-09-18 15:36:20,410 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 [2024-09-18 15:36:20,411 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 [2024-09-18 15:36:20,411 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] [2024-09-18 15:36:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-09-18 15:36:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 283. [2024-09-18 15:36:20,465 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) [2024-09-18 15:36:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 441 transitions. [2024-09-18 15:36:20,468 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 441 transitions. Word has length 83 [2024-09-18 15:36:20,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:20,468 INFO L474 AbstractCegarLoop]: Abstraction has 283 states and 441 transitions. [2024-09-18 15:36:20,469 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) [2024-09-18 15:36:20,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 441 transitions. [2024-09-18 15:36:20,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-18 15:36:20,470 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:20,470 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] [2024-09-18 15:36:20,487 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:36:20,674 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 [2024-09-18 15:36:20,675 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:20,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:20,676 INFO L85 PathProgramCache]: Analyzing trace with hash -680780915, now seen corresponding path program 1 times [2024-09-18 15:36:20,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:20,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094284285] [2024-09-18 15:36:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:20,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:36:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:36:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:36:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 15:36:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-18 15:36:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-18 15:36:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:36:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:36:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-18 15:36:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-18 15:36:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2024-09-18 15:36:20,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:20,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094284285] [2024-09-18 15:36:20,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094284285] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:20,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076932633] [2024-09-18 15:36:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:20,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:20,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:20,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:20,778 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:36:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:20,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-18 15:36:20,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 149 proven. 2 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-18 15:36:20,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2024-09-18 15:36:21,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076932633] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:21,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:21,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-09-18 15:36:21,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766504511] [2024-09-18 15:36:21,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:21,051 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 15:36:21,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:21,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 15:36:21,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:36:21,052 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) [2024-09-18 15:36:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:22,048 INFO L93 Difference]: Finished difference Result 571 states and 876 transitions. [2024-09-18 15:36:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-18 15:36:22,048 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 [2024-09-18 15:36:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:22,052 INFO L225 Difference]: With dead ends: 571 [2024-09-18 15:36:22,052 INFO L226 Difference]: Without dead ends: 343 [2024-09-18 15:36:22,054 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 [2024-09-18 15:36:22,054 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 [2024-09-18 15:36:22,055 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] [2024-09-18 15:36:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-09-18 15:36:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 237. [2024-09-18 15:36:22,119 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) [2024-09-18 15:36:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 349 transitions. [2024-09-18 15:36:22,122 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 349 transitions. Word has length 88 [2024-09-18 15:36:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:22,122 INFO L474 AbstractCegarLoop]: Abstraction has 237 states and 349 transitions. [2024-09-18 15:36:22,123 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) [2024-09-18 15:36:22,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:22,123 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 349 transitions. [2024-09-18 15:36:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-18 15:36:22,124 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:22,124 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] [2024-09-18 15:36:22,141 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 15:36:22,325 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 [2024-09-18 15:36:22,325 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:22,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1903110671, now seen corresponding path program 1 times [2024-09-18 15:36:22,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:22,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294869563] [2024-09-18 15:36:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:22,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:36:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:36:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:36:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 15:36:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 15:36:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-18 15:36:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:36:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:36:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-18 15:36:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-18 15:36:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-18 15:36:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-18 15:36:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-18 15:36:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-18 15:36:22,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:36:22,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:22,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294869563] [2024-09-18 15:36:22,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294869563] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:22,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924347803] [2024-09-18 15:36:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:22,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:22,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:22,481 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:22,482 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:36:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:22,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-18 15:36:22,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 7 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-18 15:36:22,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:36:22,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924347803] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:22,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:22,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-09-18 15:36:22,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625461317] [2024-09-18 15:36:22,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:22,917 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:36:22,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:22,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:36:22,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:36:22,919 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) [2024-09-18 15:36:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:25,139 INFO L93 Difference]: Finished difference Result 800 states and 1252 transitions. [2024-09-18 15:36:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-18 15:36:25,139 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 [2024-09-18 15:36:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:25,144 INFO L225 Difference]: With dead ends: 800 [2024-09-18 15:36:25,144 INFO L226 Difference]: Without dead ends: 469 [2024-09-18 15:36:25,147 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 [2024-09-18 15:36:25,147 INFO L434 NwaCegarLoop]: 156 mSDtfsCounter, 371 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:36:25,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1097 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-18 15:36:25,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-09-18 15:36:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 372. [2024-09-18 15:36:25,283 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) [2024-09-18 15:36:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 582 transitions. [2024-09-18 15:36:25,287 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 582 transitions. Word has length 110 [2024-09-18 15:36:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:25,288 INFO L474 AbstractCegarLoop]: Abstraction has 372 states and 582 transitions. [2024-09-18 15:36:25,288 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) [2024-09-18 15:36:25,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 582 transitions. [2024-09-18 15:36:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-18 15:36:25,290 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:25,290 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] [2024-09-18 15:36:25,307 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:36:25,494 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 [2024-09-18 15:36:25,495 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:25,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:25,495 INFO L85 PathProgramCache]: Analyzing trace with hash -853516595, now seen corresponding path program 1 times [2024-09-18 15:36:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:25,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017129263] [2024-09-18 15:36:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:25,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:36:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:36:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:36:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 15:36:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 15:36:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-18 15:36:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:36:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:36:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-18 15:36:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-18 15:36:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-18 15:36:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-18 15:36:25,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-18 15:36:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-18 15:36:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:36:25,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:25,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017129263] [2024-09-18 15:36:25,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017129263] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:25,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582186835] [2024-09-18 15:36:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:25,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:25,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:25,647 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:25,649 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:36:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:25,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:36:25,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:36:25,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:36:25,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582186835] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:25,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:25,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-09-18 15:36:25,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738566227] [2024-09-18 15:36:25,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:25,900 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-18 15:36:25,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:25,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-18 15:36:25,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:36:25,901 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) [2024-09-18 15:36:26,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:26,252 INFO L93 Difference]: Finished difference Result 434 states and 675 transitions. [2024-09-18 15:36:26,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-18 15:36:26,253 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 [2024-09-18 15:36:26,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:26,257 INFO L225 Difference]: With dead ends: 434 [2024-09-18 15:36:26,257 INFO L226 Difference]: Without dead ends: 432 [2024-09-18 15:36:26,258 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 [2024-09-18 15:36:26,258 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 [2024-09-18 15:36:26,258 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] [2024-09-18 15:36:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2024-09-18 15:36:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 376. [2024-09-18 15:36:26,391 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) [2024-09-18 15:36:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 585 transitions. [2024-09-18 15:36:26,394 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 585 transitions. Word has length 110 [2024-09-18 15:36:26,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:26,395 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 585 transitions. [2024-09-18 15:36:26,395 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) [2024-09-18 15:36:26,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:26,395 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 585 transitions. [2024-09-18 15:36:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-18 15:36:26,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:36:26,397 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] [2024-09-18 15:36:26,412 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 15:36:26,601 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 [2024-09-18 15:36:26,602 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:36:26,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:26,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1133746567, now seen corresponding path program 2 times [2024-09-18 15:36:26,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:36:26,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494747940] [2024-09-18 15:36:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:36:26,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:36:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:36:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-18 15:36:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-18 15:36:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:36:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:36:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-18 15:36:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-18 15:36:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-18 15:36:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-18 15:36:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-18 15:36:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:36:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-18 15:36:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-18 15:36:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-18 15:36:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-18 15:36:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-18 15:36:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-18 15:36:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-18 15:36:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:36:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 18 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2024-09-18 15:36:26,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:36:26,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494747940] [2024-09-18 15:36:26,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494747940] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:36:26,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920661120] [2024-09-18 15:36:26,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:36:26,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:36:26,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:36:26,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:36:26,751 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:36:26,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:36:26,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:36:26,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-18 15:36:26,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:36:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-18 15:36:27,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:36:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-18 15:36:27,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920661120] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:36:27,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:36:27,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 19 [2024-09-18 15:36:27,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162404638] [2024-09-18 15:36:27,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:36:27,218 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 15:36:27,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:36:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 15:36:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:36:27,219 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) [2024-09-18 15:36:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:36:28,512 INFO L93 Difference]: Finished difference Result 698 states and 1108 transitions. [2024-09-18 15:36:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-18 15:36:28,513 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 [2024-09-18 15:36:28,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:36:28,515 INFO L225 Difference]: With dead ends: 698 [2024-09-18 15:36:28,515 INFO L226 Difference]: Without dead ends: 0 [2024-09-18 15:36:28,520 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 [2024-09-18 15:36:28,522 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 [2024-09-18 15:36:28,522 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] [2024-09-18 15:36:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-18 15:36:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-18 15:36:28,523 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) [2024-09-18 15:36:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-18 15:36:28,525 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2024-09-18 15:36:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:36:28,525 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-18 15:36:28,526 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) [2024-09-18 15:36:28,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:36:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-18 15:36:28,526 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-18 15:36:28,529 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-18 15:36:28,548 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 15:36:28,735 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 [2024-09-18 15:36:28,739 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] [2024-09-18 15:36:28,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.