./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 5b0ae54926d75c04421ee4ea5930c958fb8ba0ccacc4d56435da8ae7b298172d --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 20:00:42,399 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 20:00:42,469 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 20:00:42,477 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 20:00:42,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 20:00:42,505 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 20:00:42,505 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 20:00:42,506 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 20:00:42,507 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 20:00:42,510 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 20:00:42,510 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 20:00:42,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 20:00:42,511 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 20:00:42,511 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 20:00:42,512 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 20:00:42,512 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 20:00:42,512 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 20:00:42,512 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 20:00:42,513 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 20:00:42,513 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 20:00:42,513 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 20:00:42,513 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 20:00:42,514 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 20:00:42,514 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 20:00:42,514 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 20:00:42,514 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 20:00:42,514 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 20:00:42,515 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 20:00:42,515 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 20:00:42,515 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 20:00:42,515 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 20:00:42,515 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 20:00:42,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:00:42,516 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 20:00:42,516 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 20:00:42,516 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 20:00:42,517 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 20:00:42,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 20:00:42,518 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 20:00:42,518 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 20:00:42,518 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 20:00:42,519 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 20:00:42,519 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/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b0ae54926d75c04421ee4ea5930c958fb8ba0ccacc4d56435da8ae7b298172d [2024-11-11 20:00:42,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 20:00:42,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 20:00:42,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 20:00:42,809 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 20:00:42,810 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 20:00:42,811 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2024-11-11 20:00:44,145 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 20:00:44,319 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 20:00:44,320 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i [2024-11-11 20:00:44,328 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/568bdc1c7/ed9768e0e516431c8383a814c56ab77f/FLAGb9c86b9bd [2024-11-11 20:00:44,698 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/568bdc1c7/ed9768e0e516431c8383a814c56ab77f [2024-11-11 20:00:44,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 20:00:44,701 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 20:00:44,703 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 20:00:44,703 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 20:00:44,708 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 20:00:44,709 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:44,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28482a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44, skipping insertion in model container [2024-11-11 20:00:44,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:44,730 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 20:00:44,875 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i[951,964] [2024-11-11 20:00:44,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:00:44,899 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 20:00:44,912 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound50.i[951,964] [2024-11-11 20:00:44,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 20:00:44,935 INFO L204 MainTranslator]: Completed translation [2024-11-11 20:00:44,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44 WrapperNode [2024-11-11 20:00:44,936 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 20:00:44,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 20:00:44,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 20:00:44,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 20:00:44,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:44,975 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:44,992 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2024-11-11 20:00:44,995 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 20:00:44,996 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 20:00:44,996 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 20:00:44,996 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 20:00:45,020 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:45,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:45,023 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:45,042 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]. [2024-11-11 20:00:45,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:45,042 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:45,047 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:45,050 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:45,051 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:45,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:45,052 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 20:00:45,053 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 20:00:45,053 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 20:00:45,053 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 20:00:45,054 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (1/1) ... [2024-11-11 20:00:45,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 20:00:45,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:00:45,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-11 20:00:45,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-11 20:00:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 20:00:45,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 20:00:45,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 20:00:45,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 20:00:45,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 20:00:45,139 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 20:00:45,202 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 20:00:45,207 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 20:00:45,374 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-11 20:00:45,377 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 20:00:45,391 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 20:00:45,391 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-11 20:00:45,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:00:45 BoogieIcfgContainer [2024-11-11 20:00:45,392 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 20:00:45,394 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 20:00:45,394 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 20:00:45,397 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 20:00:45,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 08:00:44" (1/3) ... [2024-11-11 20:00:45,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a667657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:00:45, skipping insertion in model container [2024-11-11 20:00:45,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 08:00:44" (2/3) ... [2024-11-11 20:00:45,400 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a667657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 08:00:45, skipping insertion in model container [2024-11-11 20:00:45,400 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 08:00:45" (3/3) ... [2024-11-11 20:00:45,401 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound50.i [2024-11-11 20:00:45,418 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 20:00:45,418 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 20:00:45,487 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 20:00:45,497 INFO L333 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=LoopHeads, 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;@58c930a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 20:00:45,497 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 20:00:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 20:00:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-11 20:00:45,508 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:00:45,509 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:00:45,509 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:00:45,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:00:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash 553144752, now seen corresponding path program 1 times [2024-11-11 20:00:45,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:00:45,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909701734] [2024-11-11 20:00:45,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:45,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:00:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:00:45,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:00:45,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909701734] [2024-11-11 20:00:45,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909701734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:00:45,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:00:45,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 20:00:45,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188762696] [2024-11-11 20:00:45,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:00:45,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 20:00:45,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:00:45,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 20:00:45,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 20:00:45,704 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 20:00:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:00:45,725 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2024-11-11 20:00:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 20:00:45,727 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-11 20:00:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:00:45,734 INFO L225 Difference]: With dead ends: 37 [2024-11-11 20:00:45,734 INFO L226 Difference]: Without dead ends: 17 [2024-11-11 20:00:45,738 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 20:00:45,743 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:00:45,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:00:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-11 20:00:45,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-11 20:00:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 20:00:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2024-11-11 20:00:45,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 8 [2024-11-11 20:00:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:00:45,778 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2024-11-11 20:00:45,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 20:00:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2024-11-11 20:00:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-11 20:00:45,780 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:00:45,780 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:00:45,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 20:00:45,780 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:00:45,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:00:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash -803059042, now seen corresponding path program 1 times [2024-11-11 20:00:45,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:00:45,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535183913] [2024-11-11 20:00:45,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:45,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:00:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:00:45,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:00:45,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535183913] [2024-11-11 20:00:45,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535183913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:00:45,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:00:45,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 20:00:45,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471919250] [2024-11-11 20:00:45,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:00:45,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-11 20:00:45,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:00:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-11 20:00:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 20:00:45,887 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 20:00:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:00:45,920 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-11-11 20:00:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-11 20:00:45,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-11 20:00:45,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:00:45,922 INFO L225 Difference]: With dead ends: 31 [2024-11-11 20:00:45,922 INFO L226 Difference]: Without dead ends: 19 [2024-11-11 20:00:45,922 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-11 20:00:45,924 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:00:45,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:00:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-11 20:00:45,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-11 20:00:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 20:00:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2024-11-11 20:00:45,929 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2024-11-11 20:00:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:00:45,929 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2024-11-11 20:00:45,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 20:00:45,929 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2024-11-11 20:00:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-11 20:00:45,930 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:00:45,930 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:00:45,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-11 20:00:45,930 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:00:45,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:00:45,931 INFO L85 PathProgramCache]: Analyzing trace with hash 549278495, now seen corresponding path program 1 times [2024-11-11 20:00:45,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:00:45,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706075061] [2024-11-11 20:00:45,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:45,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:00:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:00:46,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:00:46,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706075061] [2024-11-11 20:00:46,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706075061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:00:46,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:00:46,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-11 20:00:46,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847545212] [2024-11-11 20:00:46,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:00:46,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:00:46,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:00:46,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:00:46,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:00:46,043 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 20:00:46,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:00:46,066 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2024-11-11 20:00:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:00:46,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-11 20:00:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:00:46,067 INFO L225 Difference]: With dead ends: 30 [2024-11-11 20:00:46,067 INFO L226 Difference]: Without dead ends: 23 [2024-11-11 20:00:46,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:00:46,068 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:00:46,069 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:00:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-11 20:00:46,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-11-11 20:00:46,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 20:00:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-11-11 20:00:46,074 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2024-11-11 20:00:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:00:46,074 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-11-11 20:00:46,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 20:00:46,074 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-11-11 20:00:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-11 20:00:46,075 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:00:46,075 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:00:46,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-11 20:00:46,075 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:00:46,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:00:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash 551065955, now seen corresponding path program 1 times [2024-11-11 20:00:46,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:00:46,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854351047] [2024-11-11 20:00:46,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:46,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:00:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:00:46,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024562103] [2024-11-11 20:00:46,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:46,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:46,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:00:46,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:00:46,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 20:00:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:46,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-11 20:00:46,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:00:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:00:46,334 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 20:00:46,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:00:46,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854351047] [2024-11-11 20:00:46,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:00:46,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024562103] [2024-11-11 20:00:46,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024562103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:00:46,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:00:46,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-11 20:00:46,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477998367] [2024-11-11 20:00:46,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:00:46,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-11 20:00:46,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:00:46,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-11 20:00:46,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-11 20:00:46,339 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 20:00:46,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:00:46,388 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-11-11 20:00:46,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-11 20:00:46,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-11 20:00:46,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:00:46,389 INFO L225 Difference]: With dead ends: 34 [2024-11-11 20:00:46,390 INFO L226 Difference]: Without dead ends: 31 [2024-11-11 20:00:46,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-11 20:00:46,392 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:00:46,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:00:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-11 20:00:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2024-11-11 20:00:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 20:00:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-11-11 20:00:46,404 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2024-11-11 20:00:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:00:46,405 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-11-11 20:00:46,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 20:00:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-11-11 20:00:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-11 20:00:46,406 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:00:46,406 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:00:46,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 20:00:46,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:46,609 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:00:46,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:00:46,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2116548854, now seen corresponding path program 1 times [2024-11-11 20:00:46,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:00:46,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835596785] [2024-11-11 20:00:46,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:46,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:00:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:46,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:00:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:00:46,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:00:46,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835596785] [2024-11-11 20:00:46,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835596785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:00:46,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889090993] [2024-11-11 20:00:46,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:46,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:46,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:00:46,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:00:46,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 20:00:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:46,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-11 20:00:46,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:00:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:00:46,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:00:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:00:46,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889090993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:00:46,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:00:46,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-11 20:00:46,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555832698] [2024-11-11 20:00:46,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:00:46,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-11 20:00:46,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:00:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-11 20:00:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-11 20:00:46,983 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-11 20:00:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:00:47,142 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2024-11-11 20:00:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-11 20:00:47,143 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-11-11 20:00:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:00:47,144 INFO L225 Difference]: With dead ends: 125 [2024-11-11 20:00:47,145 INFO L226 Difference]: Without dead ends: 118 [2024-11-11 20:00:47,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2024-11-11 20:00:47,146 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:00:47,147 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 130 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:00:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-11 20:00:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2024-11-11 20:00:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 87 states have internal predecessors, (110), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 20:00:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2024-11-11 20:00:47,168 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 20 [2024-11-11 20:00:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:00:47,168 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2024-11-11 20:00:47,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-11 20:00:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2024-11-11 20:00:47,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-11 20:00:47,172 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:00:47,172 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:00:47,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 20:00:47,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:47,377 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:00:47,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:00:47,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2118336314, now seen corresponding path program 1 times [2024-11-11 20:00:47,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:00:47,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526728691] [2024-11-11 20:00:47,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:47,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:00:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:47,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-11 20:00:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:00:47,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:00:47,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526728691] [2024-11-11 20:00:47,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526728691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 20:00:47,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 20:00:47,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 20:00:47,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698018700] [2024-11-11 20:00:47,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 20:00:47,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 20:00:47,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:00:47,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 20:00:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 20:00:47,527 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 20:00:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:00:47,551 INFO L93 Difference]: Finished difference Result 176 states and 215 transitions. [2024-11-11 20:00:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 20:00:47,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-11-11 20:00:47,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:00:47,552 INFO L225 Difference]: With dead ends: 176 [2024-11-11 20:00:47,553 INFO L226 Difference]: Without dead ends: 87 [2024-11-11 20:00:47,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 20:00:47,554 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:00:47,555 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:00:47,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-11 20:00:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-11 20:00:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.318840579710145) internal successors, (91), 72 states have internal predecessors, (91), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 20:00:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2024-11-11 20:00:47,566 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 20 [2024-11-11 20:00:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:00:47,566 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2024-11-11 20:00:47,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 20:00:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2024-11-11 20:00:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-11 20:00:47,568 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:00:47,568 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:00:47,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-11 20:00:47,568 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:00:47,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:00:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash -441801227, now seen corresponding path program 1 times [2024-11-11 20:00:47,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:00:47,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443237217] [2024-11-11 20:00:47,569 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:47,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:00:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:47,620 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-11 20:00:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 20:00:47,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:00:47,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443237217] [2024-11-11 20:00:47,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443237217] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:00:47,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370619068] [2024-11-11 20:00:47,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:47,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:47,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:00:47,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:00:47,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 20:00:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:47,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-11 20:00:47,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:00:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-11 20:00:47,684 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:00:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 20:00:47,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370619068] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:00:47,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:00:47,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-11 20:00:47,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875644471] [2024-11-11 20:00:47,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:00:47,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 20:00:47,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:00:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 20:00:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-11 20:00:47,718 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 20:00:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:00:47,781 INFO L93 Difference]: Finished difference Result 157 states and 191 transitions. [2024-11-11 20:00:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-11 20:00:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-11 20:00:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:00:47,783 INFO L225 Difference]: With dead ends: 157 [2024-11-11 20:00:47,783 INFO L226 Difference]: Without dead ends: 87 [2024-11-11 20:00:47,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-11 20:00:47,785 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 20:00:47,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 20:00:47,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-11 20:00:47,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-11 20:00:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 72 states have internal predecessors, (88), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 20:00:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2024-11-11 20:00:47,796 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 22 [2024-11-11 20:00:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:00:47,796 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2024-11-11 20:00:47,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 20:00:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2024-11-11 20:00:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-11 20:00:47,798 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:00:47,798 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:00:47,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-11 20:00:47,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:47,999 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:00:47,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:00:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1149777120, now seen corresponding path program 1 times [2024-11-11 20:00:47,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:00:48,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70406304] [2024-11-11 20:00:48,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:48,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:00:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:00:48,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999026606] [2024-11-11 20:00:48,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:48,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:00:48,024 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:00:48,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 20:00:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:48,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-11 20:00:48,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:00:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 20:00:48,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:00:56,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:00:56,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70406304] [2024-11-11 20:00:56,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 20:00:56,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999026606] [2024-11-11 20:00:56,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999026606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:00:56,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 20:00:56,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-11-11 20:00:56,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347224949] [2024-11-11 20:00:56,951 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 20:00:56,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-11 20:00:56,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:00:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-11 20:00:56,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=185, Unknown=2, NotChecked=0, Total=240 [2024-11-11 20:00:56,953 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 20:00:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:00:57,140 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2024-11-11 20:00:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-11 20:00:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-11-11 20:00:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:00:57,142 INFO L225 Difference]: With dead ends: 114 [2024-11-11 20:00:57,145 INFO L226 Difference]: Without dead ends: 109 [2024-11-11 20:00:57,145 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=60, Invalid=210, Unknown=2, NotChecked=0, Total=272 [2024-11-11 20:00:57,146 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:00:57,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:00:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-11 20:00:57,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2024-11-11 20:00:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 86 states have internal predecessors, (100), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-11 20:00:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2024-11-11 20:00:57,164 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 23 [2024-11-11 20:00:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:00:57,164 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2024-11-11 20:00:57,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-11 20:00:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2024-11-11 20:00:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-11 20:00:57,166 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:00:57,167 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 20:00:57,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 20:00:57,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:57,367 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:00:57,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:00:57,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1814741975, now seen corresponding path program 1 times [2024-11-11 20:00:57,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:00:57,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083353951] [2024-11-11 20:00:57,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:57,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:00:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:57,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 20:00:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 20:00:57,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:00:57,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083353951] [2024-11-11 20:00:57,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083353951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:00:57,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794041] [2024-11-11 20:00:57,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:57,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:57,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:00:57,521 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:00:57,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 20:00:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:57,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-11 20:00:57,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:00:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:00:57,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:00:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 20:00:57,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:00:57,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:00:57,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-11 20:00:57,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510299479] [2024-11-11 20:00:57,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:00:57,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 20:00:57,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:00:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 20:00:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-11 20:00:57,726 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 20:00:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:00:58,008 INFO L93 Difference]: Finished difference Result 277 states and 326 transitions. [2024-11-11 20:00:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-11 20:00:58,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-11 20:00:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:00:58,010 INFO L225 Difference]: With dead ends: 277 [2024-11-11 20:00:58,011 INFO L226 Difference]: Without dead ends: 243 [2024-11-11 20:00:58,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2024-11-11 20:00:58,013 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:00:58,014 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 148 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:00:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-11 20:00:58,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 158. [2024-11-11 20:00:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 128 states have (on average 1.203125) internal successors, (154), 131 states have internal predecessors, (154), 16 states have call successors, (16), 13 states have call predecessors, (16), 13 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-11 20:00:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 184 transitions. [2024-11-11 20:00:58,052 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 184 transitions. Word has length 31 [2024-11-11 20:00:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:00:58,054 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 184 transitions. [2024-11-11 20:00:58,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-11 20:00:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 184 transitions. [2024-11-11 20:00:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-11 20:00:58,056 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:00:58,056 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-11 20:00:58,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-11 20:00:58,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:58,257 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:00:58,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:00:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash -815549923, now seen corresponding path program 2 times [2024-11-11 20:00:58,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:00:58,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771908405] [2024-11-11 20:00:58,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:58,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:00:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:58,773 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-11 20:00:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:58,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-11 20:00:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 20:00:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:00:58,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 20:00:58,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771908405] [2024-11-11 20:00:58,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771908405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 20:00:58,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094161355] [2024-11-11 20:00:58,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 20:00:58,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:58,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:00:58,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:00:58,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 20:00:58,890 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 20:00:58,890 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 20:00:58,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-11 20:00:58,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 20:00:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:00:59,048 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 20:00:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-11 20:00:59,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094161355] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 20:00:59,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 20:00:59,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2024-11-11 20:00:59,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627719741] [2024-11-11 20:00:59,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 20:00:59,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-11 20:00:59,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 20:00:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-11 20:00:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-11 20:00:59,402 INFO L87 Difference]: Start difference. First operand 158 states and 184 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 20:00:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 20:00:59,545 INFO L93 Difference]: Finished difference Result 257 states and 296 transitions. [2024-11-11 20:00:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-11 20:00:59,546 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2024-11-11 20:00:59,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 20:00:59,549 INFO L225 Difference]: With dead ends: 257 [2024-11-11 20:00:59,549 INFO L226 Difference]: Without dead ends: 138 [2024-11-11 20:00:59,550 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-11 20:00:59,551 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 20:00:59,551 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 132 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 20:00:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-11 20:00:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2024-11-11 20:00:59,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 108 states have (on average 1.1944444444444444) internal successors, (129), 110 states have internal predecessors, (129), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-11 20:00:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2024-11-11 20:00:59,574 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 32 [2024-11-11 20:00:59,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 20:00:59,574 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2024-11-11 20:00:59,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-11 20:00:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2024-11-11 20:00:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-11 20:00:59,576 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 20:00:59,576 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-11 20:00:59,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-11 20:00:59,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:59,776 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 20:00:59,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 20:00:59,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1289196803, now seen corresponding path program 3 times [2024-11-11 20:00:59,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 20:00:59,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782857729] [2024-11-11 20:00:59,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 20:00:59,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 20:00:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 20:00:59,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009262765] [2024-11-11 20:00:59,810 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 20:00:59,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 20:00:59,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 20:00:59,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-11 20:00:59,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process