./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/hh2012-ex3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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/loop-lit/hh2012-ex3.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 3c7177334f88b94ca4ee99044935e396702561856a6f48616f98f91aafc609bb --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 13:18:43,410 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 13:18:43,477 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 13:18:43,481 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 13:18:43,482 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 13:18:43,503 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 13:18:43,504 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 13:18:43,504 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 13:18:43,504 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 13:18:43,505 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 13:18:43,505 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 13:18:43,505 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 13:18:43,505 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 13:18:43,506 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 13:18:43,506 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 13:18:43,507 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 13:18:43,507 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 13:18:43,508 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 13:18:43,508 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 13:18:43,508 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 13:18:43,508 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 13:18:43,512 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 13:18:43,512 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 13:18:43,513 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 13:18:43,513 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 13:18:43,513 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 13:18:43,513 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 13:18:43,513 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 13:18:43,513 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 13:18:43,514 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 13:18:43,514 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 13:18:43,514 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 13:18:43,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:18:43,514 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 13:18:43,514 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 13:18:43,514 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 13:18:43,515 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 13:18:43,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 13:18:43,515 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 13:18:43,515 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 13:18:43,515 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 13:18:43,518 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 13:18:43,518 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c7177334f88b94ca4ee99044935e396702561856a6f48616f98f91aafc609bb [2024-11-18 13:18:43,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 13:18:43,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 13:18:43,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 13:18:43,735 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 13:18:43,735 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 13:18:43,736 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/hh2012-ex3.i [2024-11-18 13:18:44,975 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 13:18:45,138 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 13:18:45,139 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/hh2012-ex3.i [2024-11-18 13:18:45,144 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ddbc3f7c/e058655d68594ed9aeee52c00e88485a/FLAG544a7f47e [2024-11-18 13:18:45,551 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ddbc3f7c/e058655d68594ed9aeee52c00e88485a [2024-11-18 13:18:45,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 13:18:45,554 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 13:18:45,555 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 13:18:45,555 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 13:18:45,559 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 13:18:45,560 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,561 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ea9ef1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45, skipping insertion in model container [2024-11-18 13:18:45,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,582 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 13:18:45,774 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/loop-lit/hh2012-ex3.i[799,812] [2024-11-18 13:18:45,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:18:45,791 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 13:18:45,799 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/loop-lit/hh2012-ex3.i[799,812] [2024-11-18 13:18:45,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 13:18:45,814 INFO L204 MainTranslator]: Completed translation [2024-11-18 13:18:45,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45 WrapperNode [2024-11-18 13:18:45,814 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 13:18:45,815 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 13:18:45,815 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 13:18:45,815 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 13:18:45,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,836 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2024-11-18 13:18:45,837 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 13:18:45,837 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 13:18:45,837 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 13:18:45,837 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 13:18:45,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,845 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,853 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]. [2024-11-18 13:18:45,853 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,853 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,855 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,857 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,859 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 13:18:45,859 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 13:18:45,859 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 13:18:45,859 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 13:18:45,860 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (1/1) ... [2024-11-18 13:18:45,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 13:18:45,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:18:45,884 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) [2024-11-18 13:18:45,886 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 [2024-11-18 13:18:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 13:18:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 13:18:45,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 13:18:45,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 13:18:45,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-18 13:18:45,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-18 13:18:45,966 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 13:18:45,967 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 13:18:46,038 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-18 13:18:46,038 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 13:18:46,049 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 13:18:46,049 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-18 13:18:46,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:18:46 BoogieIcfgContainer [2024-11-18 13:18:46,050 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 13:18:46,051 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 13:18:46,051 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 13:18:46,054 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 13:18:46,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:18:45" (1/3) ... [2024-11-18 13:18:46,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d53c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:18:46, skipping insertion in model container [2024-11-18 13:18:46,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:18:45" (2/3) ... [2024-11-18 13:18:46,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d53c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:18:46, skipping insertion in model container [2024-11-18 13:18:46,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:18:46" (3/3) ... [2024-11-18 13:18:46,056 INFO L112 eAbstractionObserver]: Analyzing ICFG hh2012-ex3.i [2024-11-18 13:18:46,069 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 13:18:46,069 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 13:18:46,121 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 13:18:46,127 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;@646b5210, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 13:18:46,127 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 13:18:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 13:18:46,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-18 13:18:46,138 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:18:46,139 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:18:46,139 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:18:46,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:18:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash 300894425, now seen corresponding path program 1 times [2024-11-18 13:18:46,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:18:46,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984034422] [2024-11-18 13:18:46,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:18:46,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:18:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:18:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:18:46,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:18:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984034422] [2024-11-18 13:18:46,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984034422] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:18:46,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:18:46,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 13:18:46,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931478381] [2024-11-18 13:18:46,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:18:46,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 13:18:46,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:18:46,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 13:18:46,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:18:46,325 INFO L87 Difference]: Start difference. First operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2024-11-18 13:18:46,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:18:46,358 INFO L93 Difference]: Finished difference Result 45 states and 77 transitions. [2024-11-18 13:18:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 13:18:46,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2024-11-18 13:18:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:18:46,365 INFO L225 Difference]: With dead ends: 45 [2024-11-18 13:18:46,365 INFO L226 Difference]: Without dead ends: 20 [2024-11-18 13:18:46,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 13:18:46,369 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:18:46,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:18:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-18 13:18:46,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-18 13:18:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 13:18:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2024-11-18 13:18:46,400 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 8 [2024-11-18 13:18:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:18:46,400 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2024-11-18 13:18:46,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2024-11-18 13:18:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2024-11-18 13:18:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-18 13:18:46,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:18:46,402 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:18:46,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 13:18:46,402 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:18:46,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:18:46,403 INFO L85 PathProgramCache]: Analyzing trace with hash 302503139, now seen corresponding path program 1 times [2024-11-18 13:18:46,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:18:46,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451800372] [2024-11-18 13:18:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:18:46,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:18:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:18:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:18:46,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:18:46,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451800372] [2024-11-18 13:18:46,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451800372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:18:46,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:18:46,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 13:18:46,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039888106] [2024-11-18 13:18:46,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:18:46,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 13:18:46,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:18:46,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 13:18:46,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:18:46,541 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2024-11-18 13:18:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:18:46,620 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2024-11-18 13:18:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 13:18:46,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2024-11-18 13:18:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:18:46,622 INFO L225 Difference]: With dead ends: 26 [2024-11-18 13:18:46,623 INFO L226 Difference]: Without dead ends: 24 [2024-11-18 13:18:46,624 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:18:46,624 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:18:46,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:18:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-18 13:18:46,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-18 13:18:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 13:18:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-11-18 13:18:46,634 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 8 [2024-11-18 13:18:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:18:46,635 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-11-18 13:18:46,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2024-11-18 13:18:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-11-18 13:18:46,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-18 13:18:46,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:18:46,635 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:18:46,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 13:18:46,636 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:18:46,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:18:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1964350918, now seen corresponding path program 1 times [2024-11-18 13:18:46,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:18:46,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757176994] [2024-11-18 13:18:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:18:46,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:18:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:18:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 13:18:46,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:18:46,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757176994] [2024-11-18 13:18:46,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757176994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:18:46,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:18:46,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-18 13:18:46,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305354789] [2024-11-18 13:18:46,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:18:46,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 13:18:46,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:18:46,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 13:18:46,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:18:46,772 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 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) [2024-11-18 13:18:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:18:46,871 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2024-11-18 13:18:46,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 13:18:46,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 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 13 [2024-11-18 13:18:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:18:46,873 INFO L225 Difference]: With dead ends: 42 [2024-11-18 13:18:46,873 INFO L226 Difference]: Without dead ends: 40 [2024-11-18 13:18:46,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-18 13:18:46,874 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:18:46,874 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 106 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:18:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-18 13:18:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2024-11-18 13:18:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-18 13:18:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2024-11-18 13:18:46,883 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 13 [2024-11-18 13:18:46,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:18:46,883 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2024-11-18 13:18:46,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 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) [2024-11-18 13:18:46,883 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2024-11-18 13:18:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-18 13:18:46,884 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:18:46,884 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:18:46,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 13:18:46,884 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:18:46,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:18:46,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1092746621, now seen corresponding path program 1 times [2024-11-18 13:18:46,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:18:46,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299724821] [2024-11-18 13:18:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:18:46,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:18:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:18:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 13:18:46,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:18:46,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299724821] [2024-11-18 13:18:46,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299724821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:18:46,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:18:46,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-18 13:18:46,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623150741] [2024-11-18 13:18:46,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:18:46,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 13:18:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:18:46,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 13:18:46,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:18:46,993 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 13:18:47,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:18:47,076 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-11-18 13:18:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 13:18:47,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-11-18 13:18:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:18:47,077 INFO L225 Difference]: With dead ends: 46 [2024-11-18 13:18:47,077 INFO L226 Difference]: Without dead ends: 44 [2024-11-18 13:18:47,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-18 13:18:47,078 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 13:18:47,079 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 91 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 13:18:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-18 13:18:47,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-18 13:18:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-18 13:18:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2024-11-18 13:18:47,102 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 18 [2024-11-18 13:18:47,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:18:47,102 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2024-11-18 13:18:47,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-18 13:18:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2024-11-18 13:18:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-18 13:18:47,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:18:47,103 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:18:47,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-18 13:18:47,104 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:18:47,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:18:47,104 INFO L85 PathProgramCache]: Analyzing trace with hash 961880998, now seen corresponding path program 1 times [2024-11-18 13:18:47,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:18:47,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055705613] [2024-11-18 13:18:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:18:47,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:18:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:18:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-18 13:18:47,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:18:47,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055705613] [2024-11-18 13:18:47,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055705613] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:18:47,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:18:47,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 13:18:47,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183590532] [2024-11-18 13:18:47,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:18:47,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 13:18:47,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:18:47,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 13:18:47,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:18:47,169 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 13:18:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:18:47,218 INFO L93 Difference]: Finished difference Result 89 states and 120 transitions. [2024-11-18 13:18:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 13:18:47,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-11-18 13:18:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:18:47,220 INFO L225 Difference]: With dead ends: 89 [2024-11-18 13:18:47,220 INFO L226 Difference]: Without dead ends: 56 [2024-11-18 13:18:47,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:18:47,221 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:18:47,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:18:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-18 13:18:47,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-11-18 13:18:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-18 13:18:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2024-11-18 13:18:47,238 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 23 [2024-11-18 13:18:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:18:47,238 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2024-11-18 13:18:47,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-18 13:18:47,239 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2024-11-18 13:18:47,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 13:18:47,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:18:47,239 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-18 13:18:47,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-18 13:18:47,240 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:18:47,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:18:47,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1962382770, now seen corresponding path program 1 times [2024-11-18 13:18:47,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:18:47,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261101271] [2024-11-18 13:18:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:18:47,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:18:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:18:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2024-11-18 13:18:47,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:18:47,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261101271] [2024-11-18 13:18:47,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261101271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:18:47,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:18:47,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-18 13:18:47,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963041451] [2024-11-18 13:18:47,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:18:47,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-18 13:18:47,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:18:47,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-18 13:18:47,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-18 13:18:47,328 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-18 13:18:47,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:18:47,375 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-11-18 13:18:47,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 13:18:47,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2024-11-18 13:18:47,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:18:47,378 INFO L225 Difference]: With dead ends: 62 [2024-11-18 13:18:47,378 INFO L226 Difference]: Without dead ends: 60 [2024-11-18 13:18:47,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:18:47,379 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:18:47,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:18:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-18 13:18:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-18 13:18:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-18 13:18:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2024-11-18 13:18:47,398 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 44 [2024-11-18 13:18:47,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:18:47,398 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2024-11-18 13:18:47,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-18 13:18:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2024-11-18 13:18:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-18 13:18:47,400 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:18:47,401 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:18:47,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-18 13:18:47,401 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:18:47,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:18:47,403 INFO L85 PathProgramCache]: Analyzing trace with hash -896370565, now seen corresponding path program 1 times [2024-11-18 13:18:47,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:18:47,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82434725] [2024-11-18 13:18:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:18:47,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:18:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:18:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-18 13:18:47,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:18:47,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82434725] [2024-11-18 13:18:47,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82434725] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:18:47,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087949782] [2024-11-18 13:18:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 13:18:47,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:18:47,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:18:47,508 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) [2024-11-18 13:18:47,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 13:18:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 13:18:47,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-18 13:18:47,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:18:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 184 proven. 7 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-18 13:18:47,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:18:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-11-18 13:18:47,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087949782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 13:18:47,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 13:18:47,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-18 13:18:47,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338388006] [2024-11-18 13:18:47,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 13:18:47,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 13:18:47,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:18:47,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 13:18:47,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:18:47,738 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2024-11-18 13:18:47,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:18:47,796 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2024-11-18 13:18:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 13:18:47,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 78 [2024-11-18 13:18:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:18:47,813 INFO L225 Difference]: With dead ends: 126 [2024-11-18 13:18:47,813 INFO L226 Difference]: Without dead ends: 80 [2024-11-18 13:18:47,813 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:18:47,814 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:18:47,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:18:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-18 13:18:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-18 13:18:47,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 39 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-18 13:18:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 115 transitions. [2024-11-18 13:18:47,828 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 115 transitions. Word has length 78 [2024-11-18 13:18:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:18:47,828 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 115 transitions. [2024-11-18 13:18:47,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2024-11-18 13:18:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 115 transitions. [2024-11-18 13:18:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-11-18 13:18:47,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:18:47,830 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:18:47,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 13:18:48,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:18:48,034 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:18:48,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:18:48,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1496774405, now seen corresponding path program 2 times [2024-11-18 13:18:48,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:18:48,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732346385] [2024-11-18 13:18:48,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:18:48,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:18:48,057 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:18:48,057 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:18:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2024-11-18 13:18:48,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:18:48,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732346385] [2024-11-18 13:18:48,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732346385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 13:18:48,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650574725] [2024-11-18 13:18:48,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 13:18:48,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 13:18:48,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 13:18:48,324 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) [2024-11-18 13:18:48,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 13:18:48,405 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 13:18:48,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:18:48,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-18 13:18:48,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 13:18:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 49 proven. 41 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-11-18 13:18:48,692 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 13:18:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2024-11-18 13:18:48,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650574725] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-18 13:18:48,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-18 13:18:48,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 13] total 22 [2024-11-18 13:18:48,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184293465] [2024-11-18 13:18:48,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:18:48,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 13:18:48,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:18:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 13:18:48,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2024-11-18 13:18:48,918 INFO L87 Difference]: Start difference. First operand 80 states and 115 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-18 13:18:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:18:48,977 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2024-11-18 13:18:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 13:18:48,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 120 [2024-11-18 13:18:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:18:48,979 INFO L225 Difference]: With dead ends: 86 [2024-11-18 13:18:48,979 INFO L226 Difference]: Without dead ends: 84 [2024-11-18 13:18:48,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 226 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2024-11-18 13:18:48,982 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:18:48,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:18:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-18 13:18:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-18 13:18:48,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 39 states have call successors, (39), 7 states have call predecessors, (39), 7 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-18 13:18:48,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 118 transitions. [2024-11-18 13:18:48,992 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 118 transitions. Word has length 120 [2024-11-18 13:18:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:18:48,993 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 118 transitions. [2024-11-18 13:18:48,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-18 13:18:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 118 transitions. [2024-11-18 13:18:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-18 13:18:48,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 13:18:48,994 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 13:18:49,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-18 13:18:49,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-18 13:18:49,199 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 13:18:49,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 13:18:49,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1777971090, now seen corresponding path program 3 times [2024-11-18 13:18:49,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 13:18:49,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642041318] [2024-11-18 13:18:49,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 13:18:49,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 13:18:49,208 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-18 13:18:49,209 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 13:18:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 959 trivial. 0 not checked. [2024-11-18 13:18:49,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 13:18:49,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642041318] [2024-11-18 13:18:49,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642041318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 13:18:49,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 13:18:49,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 13:18:49,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874430793] [2024-11-18 13:18:49,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 13:18:49,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 13:18:49,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 13:18:49,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 13:18:49,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 13:18:49,247 INFO L87 Difference]: Start difference. First operand 84 states and 118 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-18 13:18:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 13:18:49,290 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2024-11-18 13:18:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 13:18:49,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2024-11-18 13:18:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 13:18:49,291 INFO L225 Difference]: With dead ends: 84 [2024-11-18 13:18:49,291 INFO L226 Difference]: Without dead ends: 0 [2024-11-18 13:18:49,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 13:18:49,293 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 13:18:49,293 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 64 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 13:18:49,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-18 13:18:49,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-18 13:18:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 13:18:49,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-18 13:18:49,294 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 125 [2024-11-18 13:18:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 13:18:49,294 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-18 13:18:49,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-18 13:18:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-18 13:18:49,294 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-18 13:18:49,298 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-18 13:18:49,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-18 13:18:49,301 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2024-11-18 13:18:49,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-18 13:18:49,621 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-18 13:18:49,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:18:49 BoogieIcfgContainer [2024-11-18 13:18:49,638 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-18 13:18:49,639 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-18 13:18:49,639 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-18 13:18:49,639 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-18 13:18:49,639 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:18:46" (3/4) ... [2024-11-18 13:18:49,642 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-18 13:18:49,645 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-18 13:18:49,649 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2024-11-18 13:18:49,649 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-18 13:18:49,649 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-18 13:18:49,649 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-18 13:18:49,727 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-18 13:18:49,728 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-18 13:18:49,728 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-18 13:18:49,728 INFO L158 Benchmark]: Toolchain (without parser) took 4174.42ms. Allocated memory was 165.7MB in the beginning and 203.4MB in the end (delta: 37.7MB). Free memory was 96.5MB in the beginning and 131.4MB in the end (delta: -34.9MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2024-11-18 13:18:49,729 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 113.2MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-18 13:18:49,729 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.47ms. Allocated memory is still 165.7MB. Free memory was 96.3MB in the beginning and 133.3MB in the end (delta: -37.0MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. [2024-11-18 13:18:49,729 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.83ms. Allocated memory is still 165.7MB. Free memory was 133.3MB in the beginning and 132.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-18 13:18:49,729 INFO L158 Benchmark]: Boogie Preprocessor took 21.62ms. Allocated memory is still 165.7MB. Free memory was 132.1MB in the beginning and 130.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-18 13:18:49,729 INFO L158 Benchmark]: RCFGBuilder took 190.43ms. Allocated memory is still 165.7MB. Free memory was 130.0MB in the beginning and 119.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-18 13:18:49,730 INFO L158 Benchmark]: TraceAbstraction took 3587.14ms. Allocated memory was 165.7MB in the beginning and 203.4MB in the end (delta: 37.7MB). Free memory was 118.7MB in the beginning and 135.6MB in the end (delta: -16.9MB). Peak memory consumption was 101.1MB. Max. memory is 16.1GB. [2024-11-18 13:18:49,730 INFO L158 Benchmark]: Witness Printer took 89.19ms. Allocated memory is still 203.4MB. Free memory was 135.6MB in the beginning and 131.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-18 13:18:49,731 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 113.2MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.47ms. Allocated memory is still 165.7MB. Free memory was 96.3MB in the beginning and 133.3MB in the end (delta: -37.0MB). Peak memory consumption was 10.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.83ms. Allocated memory is still 165.7MB. Free memory was 133.3MB in the beginning and 132.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.62ms. Allocated memory is still 165.7MB. Free memory was 132.1MB in the beginning and 130.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 190.43ms. Allocated memory is still 165.7MB. Free memory was 130.0MB in the beginning and 119.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3587.14ms. Allocated memory was 165.7MB in the beginning and 203.4MB in the end (delta: 37.7MB). Free memory was 118.7MB in the beginning and 135.6MB in the end (delta: -16.9MB). Peak memory consumption was 101.1MB. Max. memory is 16.1GB. * Witness Printer took 89.19ms. Allocated memory is still 203.4MB. Free memory was 135.6MB in the beginning and 131.4MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.2s, OverallIterations: 9, TraceHistogramMax: 23, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 62 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29 mSDsluCounter, 730 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 518 mSDsCounter, 29 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 350 IncrementalHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29 mSolverCounterUnsat, 212 mSDtfsCounter, 350 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 459 GetRequests, 393 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=8, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 635 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 820 ConstructedInterpolants, 0 QuantifiedInterpolants, 1372 SizeOfPredicates, 1 NumberOfNonLiveVariables, 420 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 13 InterpolantComputations, 8 PerfectInterpolantSequences, 4932/5000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (0 < ((long long) i + 1)) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((((i <= 3) && (0 <= i)) && (j == 0)) || ((((j <= 4) && (1 <= j)) && (i <= ((long long) 3 + j))) && (j <= i))) - ProcedureContractResult [Line: 13]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: (cond != 0) RESULT: Ultimate proved your program to be correct! [2024-11-18 13:18:49,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE