./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount32.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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/hardware-verification-bv/btor2c-lazyMod.twocount32.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 1f88bd3867028d60c5c1c8fa67c55aaa517a9782eae2d2c8498cbbc5893e8cf0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 18:13:06,977 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 18:13:07,038 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2024-11-18 18:13:07,043 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 18:13:07,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 18:13:07,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 18:13:07,069 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 18:13:07,070 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 18:13:07,070 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 18:13:07,071 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 18:13:07,072 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 18:13:07,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 18:13:07,073 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 18:13:07,073 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 18:13:07,074 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 18:13:07,075 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 18:13:07,075 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 18:13:07,075 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 18:13:07,075 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 18:13:07,075 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 18:13:07,076 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 18:13:07,076 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 18:13:07,078 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 18:13:07,078 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 18:13:07,078 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 18:13:07,079 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 18:13:07,079 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 18:13:07,079 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 18:13:07,079 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 18:13:07,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 18:13:07,079 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 18:13:07,079 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 18:13:07,080 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 18:13:07,080 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 18:13:07,080 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 18:13:07,080 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 18:13:07,080 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 18:13:07,080 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 18:13:07,080 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 18:13:07,080 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f88bd3867028d60c5c1c8fa67c55aaa517a9782eae2d2c8498cbbc5893e8cf0 [2024-11-18 18:13:07,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 18:13:07,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 18:13:07,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 18:13:07,277 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 18:13:07,277 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 18:13:07,278 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount32.c [2024-11-18 18:13:08,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 18:13:08,953 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 18:13:08,953 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.twocount32.c [2024-11-18 18:13:08,963 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f771b0cc/3b094a7f7a024e58b99c2004ac797a6b/FLAG9d4a3d5b0 [2024-11-18 18:13:08,978 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f771b0cc/3b094a7f7a024e58b99c2004ac797a6b [2024-11-18 18:13:08,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 18:13:08,983 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 18:13:08,985 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 18:13:08,986 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 18:13:08,991 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 18:13:08,992 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:13:08" (1/1) ... [2024-11-18 18:13:08,994 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a96a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:08, skipping insertion in model container [2024-11-18 18:13:08,994 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:13:08" (1/1) ... [2024-11-18 18:13:09,015 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 18:13:09,171 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/hardware-verification-bv/btor2c-lazyMod.twocount32.c[1260,1273] [2024-11-18 18:13:09,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 18:13:09,209 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 18:13:09,221 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/hardware-verification-bv/btor2c-lazyMod.twocount32.c[1260,1273] [2024-11-18 18:13:09,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 18:13:09,246 INFO L204 MainTranslator]: Completed translation [2024-11-18 18:13:09,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09 WrapperNode [2024-11-18 18:13:09,247 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 18:13:09,248 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 18:13:09,248 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 18:13:09,248 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 18:13:09,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,263 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,294 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 138 [2024-11-18 18:13:09,294 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 18:13:09,295 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 18:13:09,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 18:13:09,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 18:13:09,303 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,306 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,324 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 18:13:09,328 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,328 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,333 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,337 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,345 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,347 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 18:13:09,348 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 18:13:09,348 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 18:13:09,348 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 18:13:09,349 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (1/1) ... [2024-11-18 18:13:09,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 18:13:09,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 18:13:09,411 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 18:13:09,416 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 18:13:09,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 18:13:09,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 18:13:09,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 18:13:09,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 18:13:09,524 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 18:13:09,525 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 18:13:09,779 INFO L? ?]: Removed 65 outVars from TransFormulas that were not future-live. [2024-11-18 18:13:09,780 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 18:13:09,794 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 18:13:09,794 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-18 18:13:09,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:13:09 BoogieIcfgContainer [2024-11-18 18:13:09,795 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 18:13:09,796 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 18:13:09,797 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 18:13:09,799 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 18:13:09,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:13:08" (1/3) ... [2024-11-18 18:13:09,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c23981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:13:09, skipping insertion in model container [2024-11-18 18:13:09,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:13:09" (2/3) ... [2024-11-18 18:13:09,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77c23981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:13:09, skipping insertion in model container [2024-11-18 18:13:09,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:13:09" (3/3) ... [2024-11-18 18:13:09,802 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.twocount32.c [2024-11-18 18:13:09,814 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 18:13:09,815 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 18:13:09,858 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 18:13:09,864 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;@76a3938e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 18:13:09,864 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 18:13:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 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 18:13:09,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-18 18:13:09,872 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:09,873 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:09,873 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:09,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:09,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1332240297, now seen corresponding path program 1 times [2024-11-18 18:13:09,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:09,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622752386] [2024-11-18 18:13:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:09,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:10,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:10,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622752386] [2024-11-18 18:13:10,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622752386] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 18:13:10,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 18:13:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 18:13:10,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84733216] [2024-11-18 18:13:10,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 18:13:10,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 18:13:10,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 18:13:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 18:13:10,363 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.475) internal successors, (59), 41 states have internal predecessors, (59), 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) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 18:13:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:10,394 INFO L93 Difference]: Finished difference Result 73 states and 105 transitions. [2024-11-18 18:13:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 18:13:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) Word has length 15 [2024-11-18 18:13:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:10,401 INFO L225 Difference]: With dead ends: 73 [2024-11-18 18:13:10,402 INFO L226 Difference]: Without dead ends: 41 [2024-11-18 18:13:10,404 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 18:13:10,406 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:10,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 153 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 18:13:10,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-18 18:13:10,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-18 18:13:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 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 18:13:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2024-11-18 18:13:10,430 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 15 [2024-11-18 18:13:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:10,431 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2024-11-18 18:13:10,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 18:13:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2024-11-18 18:13:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-18 18:13:10,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:10,432 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:10,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 18:13:10,432 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:10,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:10,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1648528535, now seen corresponding path program 1 times [2024-11-18 18:13:10,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:10,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137138373] [2024-11-18 18:13:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:10,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:10,546 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 18:13:10,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:10,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137138373] [2024-11-18 18:13:10,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137138373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 18:13:10,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 18:13:10,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 18:13:10,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544289857] [2024-11-18 18:13:10,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 18:13:10,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 18:13:10,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 18:13:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 18:13:10,553 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 18:13:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:10,582 INFO L93 Difference]: Finished difference Result 74 states and 103 transitions. [2024-11-18 18:13:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 18:13:10,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) Word has length 16 [2024-11-18 18:13:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:10,584 INFO L225 Difference]: With dead ends: 74 [2024-11-18 18:13:10,584 INFO L226 Difference]: Without dead ends: 43 [2024-11-18 18:13:10,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 18:13:10,586 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:10,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 18:13:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-18 18:13:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-18 18:13:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 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 18:13:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2024-11-18 18:13:10,592 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 16 [2024-11-18 18:13:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:10,593 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2024-11-18 18:13:10,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 18:13:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2024-11-18 18:13:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-18 18:13:10,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:10,595 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:10,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 18:13:10,596 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:10,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:10,597 INFO L85 PathProgramCache]: Analyzing trace with hash -662742910, now seen corresponding path program 1 times [2024-11-18 18:13:10,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:10,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230356930] [2024-11-18 18:13:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:10,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:10,885 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 18:13:10,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:10,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230356930] [2024-11-18 18:13:10,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230356930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 18:13:10,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 18:13:10,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 18:13:10,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25668298] [2024-11-18 18:13:10,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 18:13:10,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 18:13:10,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:10,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 18:13:10,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-18 18:13:10,888 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 18:13:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:10,991 INFO L93 Difference]: Finished difference Result 95 states and 130 transitions. [2024-11-18 18:13:10,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 18:13:10,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) Word has length 17 [2024-11-18 18:13:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:10,993 INFO L225 Difference]: With dead ends: 95 [2024-11-18 18:13:10,993 INFO L226 Difference]: Without dead ends: 62 [2024-11-18 18:13:10,993 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-18 18:13:10,994 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 30 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:10,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 18:13:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-18 18:13:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2024-11-18 18:13:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 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 18:13:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2024-11-18 18:13:11,003 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 17 [2024-11-18 18:13:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:11,003 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2024-11-18 18:13:11,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 18:13:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2024-11-18 18:13:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-18 18:13:11,005 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:11,005 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:11,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 18:13:11,005 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:11,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:11,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1114665294, now seen corresponding path program 1 times [2024-11-18 18:13:11,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:11,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048001879] [2024-11-18 18:13:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:11,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:11,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:11,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048001879] [2024-11-18 18:13:11,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048001879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 18:13:11,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 18:13:11,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-18 18:13:11,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309391001] [2024-11-18 18:13:11,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 18:13:11,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 18:13:11,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:11,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 18:13:11,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-18 18:13:11,467 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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 18:13:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:11,602 INFO L93 Difference]: Finished difference Result 99 states and 135 transitions. [2024-11-18 18:13:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 18:13:11,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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) Word has length 32 [2024-11-18 18:13:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:11,604 INFO L225 Difference]: With dead ends: 99 [2024-11-18 18:13:11,604 INFO L226 Difference]: Without dead ends: 66 [2024-11-18 18:13:11,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-18 18:13:11,606 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:11,606 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 168 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 18:13:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-18 18:13:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2024-11-18 18:13:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3666666666666667) internal successors, (82), 60 states have internal predecessors, (82), 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 18:13:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 82 transitions. [2024-11-18 18:13:11,611 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 82 transitions. Word has length 32 [2024-11-18 18:13:11,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:11,611 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 82 transitions. [2024-11-18 18:13:11,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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 18:13:11,611 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 82 transitions. [2024-11-18 18:13:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-18 18:13:11,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:11,612 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:11,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-18 18:13:11,612 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:11,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:11,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1021666017, now seen corresponding path program 1 times [2024-11-18 18:13:11,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:11,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910628516] [2024-11-18 18:13:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:11,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:11,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:11,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910628516] [2024-11-18 18:13:11,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910628516] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 18:13:11,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 18:13:11,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-18 18:13:11,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835384632] [2024-11-18 18:13:11,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 18:13:11,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 18:13:11,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:11,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 18:13:11,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-18 18:13:11,964 INFO L87 Difference]: Start difference. First operand 61 states and 82 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 18:13:12,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:12,087 INFO L93 Difference]: Finished difference Result 137 states and 183 transitions. [2024-11-18 18:13:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 18:13:12,090 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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) Word has length 33 [2024-11-18 18:13:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:12,090 INFO L225 Difference]: With dead ends: 137 [2024-11-18 18:13:12,090 INFO L226 Difference]: Without dead ends: 102 [2024-11-18 18:13:12,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-18 18:13:12,092 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 50 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:12,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 324 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 18:13:12,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-18 18:13:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-11-18 18:13:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.3298969072164948) internal successors, (129), 97 states have internal predecessors, (129), 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 18:13:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2024-11-18 18:13:12,102 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 33 [2024-11-18 18:13:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:12,103 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2024-11-18 18:13:12,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 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 18:13:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2024-11-18 18:13:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-18 18:13:12,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:12,104 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:12,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-18 18:13:12,104 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:12,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:12,105 INFO L85 PathProgramCache]: Analyzing trace with hash 752614074, now seen corresponding path program 1 times [2024-11-18 18:13:12,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:12,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064009794] [2024-11-18 18:13:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:12,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:12,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:12,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064009794] [2024-11-18 18:13:12,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064009794] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 18:13:12,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 18:13:12,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-18 18:13:12,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444637740] [2024-11-18 18:13:12,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 18:13:12,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 18:13:12,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 18:13:12,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-18 18:13:12,421 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 18:13:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:12,525 INFO L93 Difference]: Finished difference Result 102 states and 133 transitions. [2024-11-18 18:13:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 18:13:12,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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) Word has length 33 [2024-11-18 18:13:12,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:12,526 INFO L225 Difference]: With dead ends: 102 [2024-11-18 18:13:12,527 INFO L226 Difference]: Without dead ends: 71 [2024-11-18 18:13:12,527 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-18 18:13:12,528 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 20 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:12,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 157 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 18:13:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-18 18:13:12,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2024-11-18 18:13:12,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 68 states have internal predecessors, (90), 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 18:13:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 90 transitions. [2024-11-18 18:13:12,533 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 90 transitions. Word has length 33 [2024-11-18 18:13:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:12,534 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 90 transitions. [2024-11-18 18:13:12,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 18:13:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 90 transitions. [2024-11-18 18:13:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-18 18:13:12,535 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:12,535 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:12,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-18 18:13:12,535 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:12,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2139675296, now seen corresponding path program 1 times [2024-11-18 18:13:12,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:12,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228859907] [2024-11-18 18:13:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:12,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:12,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:12,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228859907] [2024-11-18 18:13:12,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228859907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 18:13:12,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 18:13:12,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 18:13:12,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466084405] [2024-11-18 18:13:12,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 18:13:12,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 18:13:12,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:12,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 18:13:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 18:13:12,883 INFO L87 Difference]: Start difference. First operand 69 states and 90 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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 18:13:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:12,955 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2024-11-18 18:13:12,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-18 18:13:12,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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) Word has length 34 [2024-11-18 18:13:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:12,956 INFO L225 Difference]: With dead ends: 106 [2024-11-18 18:13:12,956 INFO L226 Difference]: Without dead ends: 69 [2024-11-18 18:13:12,957 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 18:13:12,957 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 13 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:12,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 18:13:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-18 18:13:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-18 18:13:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 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 18:13:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 89 transitions. [2024-11-18 18:13:12,967 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 89 transitions. Word has length 34 [2024-11-18 18:13:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:12,969 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 89 transitions. [2024-11-18 18:13:12,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 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 18:13:12,969 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 89 transitions. [2024-11-18 18:13:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-18 18:13:12,970 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:12,970 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:12,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-18 18:13:12,970 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:12,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:12,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1446209903, now seen corresponding path program 1 times [2024-11-18 18:13:12,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:12,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899410299] [2024-11-18 18:13:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:12,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:13,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:13,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899410299] [2024-11-18 18:13:13,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899410299] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 18:13:13,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 18:13:13,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-18 18:13:13,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770990802] [2024-11-18 18:13:13,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 18:13:13,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 18:13:13,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:13,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 18:13:13,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-18 18:13:13,329 INFO L87 Difference]: Start difference. First operand 69 states and 89 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 18:13:13,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:13,424 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2024-11-18 18:13:13,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 18:13:13,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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) Word has length 34 [2024-11-18 18:13:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:13,427 INFO L225 Difference]: With dead ends: 108 [2024-11-18 18:13:13,427 INFO L226 Difference]: Without dead ends: 75 [2024-11-18 18:13:13,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-18 18:13:13,428 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:13,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 144 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 18:13:13,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-18 18:13:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2024-11-18 18:13:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 73 states have internal predecessors, (96), 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 18:13:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2024-11-18 18:13:13,437 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 34 [2024-11-18 18:13:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:13,437 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2024-11-18 18:13:13,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 18:13:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2024-11-18 18:13:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-18 18:13:13,438 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:13,438 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:13,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-18 18:13:13,438 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:13,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:13,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1177157960, now seen corresponding path program 1 times [2024-11-18 18:13:13,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:13,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334465650] [2024-11-18 18:13:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:13,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:13,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:13,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334465650] [2024-11-18 18:13:13,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334465650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 18:13:13,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718194825] [2024-11-18 18:13:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:13,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:13,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 18:13:13,611 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 18:13:13,614 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 18:13:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:13,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-18 18:13:13,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 18:13:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:13,812 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 18:13:13,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718194825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 18:13:13,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 18:13:13,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2024-11-18 18:13:13,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132427368] [2024-11-18 18:13:13,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 18:13:13,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-18 18:13:13,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:13,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-18 18:13:13,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-18 18:13:13,815 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 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 18:13:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:13,915 INFO L93 Difference]: Finished difference Result 150 states and 196 transitions. [2024-11-18 18:13:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 18:13:13,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 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) Word has length 34 [2024-11-18 18:13:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:13,916 INFO L225 Difference]: With dead ends: 150 [2024-11-18 18:13:13,916 INFO L226 Difference]: Without dead ends: 112 [2024-11-18 18:13:13,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-11-18 18:13:13,916 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 65 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:13,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 239 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 18:13:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-18 18:13:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2024-11-18 18:13:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.2897196261682242) internal successors, (138), 107 states have internal predecessors, (138), 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 18:13:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 138 transitions. [2024-11-18 18:13:13,929 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 138 transitions. Word has length 34 [2024-11-18 18:13:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:13,929 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 138 transitions. [2024-11-18 18:13:13,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 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 18:13:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 138 transitions. [2024-11-18 18:13:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-18 18:13:13,930 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:13,930 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:13,951 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 18:13:14,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:14,136 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:14,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:14,138 INFO L85 PathProgramCache]: Analyzing trace with hash -322309897, now seen corresponding path program 1 times [2024-11-18 18:13:14,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:14,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052117828] [2024-11-18 18:13:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:14,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:14,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:14,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052117828] [2024-11-18 18:13:14,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052117828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 18:13:14,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430519266] [2024-11-18 18:13:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:14,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:14,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 18:13:14,365 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 18:13:14,370 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 18:13:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:14,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-18 18:13:14,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 18:13:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:14,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 18:13:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:14,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430519266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 18:13:14,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 18:13:14,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 18 [2024-11-18 18:13:14,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717004929] [2024-11-18 18:13:14,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 18:13:14,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-18 18:13:14,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:14,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-18 18:13:14,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-11-18 18:13:14,916 INFO L87 Difference]: Start difference. First operand 108 states and 138 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 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 18:13:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:15,155 INFO L93 Difference]: Finished difference Result 195 states and 254 transitions. [2024-11-18 18:13:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 18:13:15,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 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) Word has length 35 [2024-11-18 18:13:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:15,156 INFO L225 Difference]: With dead ends: 195 [2024-11-18 18:13:15,156 INFO L226 Difference]: Without dead ends: 141 [2024-11-18 18:13:15,156 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2024-11-18 18:13:15,157 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 97 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:15,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 237 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 18:13:15,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-18 18:13:15,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 117. [2024-11-18 18:13:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 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 18:13:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 149 transitions. [2024-11-18 18:13:15,162 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 149 transitions. Word has length 35 [2024-11-18 18:13:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:15,162 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 149 transitions. [2024-11-18 18:13:15,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 18 states have internal predecessors, (85), 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 18:13:15,163 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 149 transitions. [2024-11-18 18:13:15,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-18 18:13:15,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:15,163 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:15,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 18:13:15,367 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,SelfDestructingSolverStorable9 [2024-11-18 18:13:15,368 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:15,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:15,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1314653832, now seen corresponding path program 1 times [2024-11-18 18:13:15,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:15,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585303512] [2024-11-18 18:13:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:15,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:15,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:15,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585303512] [2024-11-18 18:13:15,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585303512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 18:13:15,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114275099] [2024-11-18 18:13:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:15,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:15,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 18:13:15,518 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 18:13:15,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 18:13:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:15,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-18 18:13:15,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 18:13:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:15,642 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 18:13:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:15,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114275099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 18:13:15,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 18:13:15,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-18 18:13:15,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330524546] [2024-11-18 18:13:15,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 18:13:15,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-18 18:13:15,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:15,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-18 18:13:15,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-18 18:13:15,720 INFO L87 Difference]: Start difference. First operand 117 states and 149 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 18:13:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:15,824 INFO L93 Difference]: Finished difference Result 243 states and 316 transitions. [2024-11-18 18:13:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 18:13:15,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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) Word has length 36 [2024-11-18 18:13:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:15,825 INFO L225 Difference]: With dead ends: 243 [2024-11-18 18:13:15,825 INFO L226 Difference]: Without dead ends: 149 [2024-11-18 18:13:15,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-18 18:13:15,826 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:15,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 416 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 18:13:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-18 18:13:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2024-11-18 18:13:15,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2816901408450705) internal successors, (182), 142 states have internal predecessors, (182), 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 18:13:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 182 transitions. [2024-11-18 18:13:15,839 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 182 transitions. Word has length 36 [2024-11-18 18:13:15,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:15,839 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 182 transitions. [2024-11-18 18:13:15,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 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 18:13:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 182 transitions. [2024-11-18 18:13:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-18 18:13:15,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:15,840 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:15,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 18:13:16,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:16,042 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:16,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:16,043 INFO L85 PathProgramCache]: Analyzing trace with hash 773832856, now seen corresponding path program 1 times [2024-11-18 18:13:16,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:16,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195128654] [2024-11-18 18:13:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:16,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:16,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:16,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195128654] [2024-11-18 18:13:16,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195128654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 18:13:16,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186250596] [2024-11-18 18:13:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:16,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:16,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 18:13:16,317 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 18:13:16,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 18:13:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:16,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-18 18:13:16,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 18:13:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:16,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 18:13:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:16,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186250596] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 18:13:16,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 18:13:16,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 17 [2024-11-18 18:13:16,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137993848] [2024-11-18 18:13:16,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 18:13:16,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-18 18:13:16,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-18 18:13:16,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-18 18:13:16,795 INFO L87 Difference]: Start difference. First operand 143 states and 182 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 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 18:13:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:16,986 INFO L93 Difference]: Finished difference Result 290 states and 371 transitions. [2024-11-18 18:13:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-18 18:13:16,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 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) Word has length 36 [2024-11-18 18:13:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:16,988 INFO L225 Difference]: With dead ends: 290 [2024-11-18 18:13:16,988 INFO L226 Difference]: Without dead ends: 205 [2024-11-18 18:13:16,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2024-11-18 18:13:16,989 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 121 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:16,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 276 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 18:13:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-18 18:13:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 168. [2024-11-18 18:13:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.281437125748503) internal successors, (214), 167 states have internal predecessors, (214), 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 18:13:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 214 transitions. [2024-11-18 18:13:16,998 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 214 transitions. Word has length 36 [2024-11-18 18:13:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:16,998 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 214 transitions. [2024-11-18 18:13:16,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 17 states have internal predecessors, (75), 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 18:13:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 214 transitions. [2024-11-18 18:13:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-18 18:13:16,999 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:17,000 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:17,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 18:13:17,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:17,204 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:17,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:17,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1107423974, now seen corresponding path program 1 times [2024-11-18 18:13:17,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:17,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263423149] [2024-11-18 18:13:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:17,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:17,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:17,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263423149] [2024-11-18 18:13:17,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263423149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 18:13:17,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 18:13:17,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-18 18:13:17,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057450749] [2024-11-18 18:13:17,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 18:13:17,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 18:13:17,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:17,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 18:13:17,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 18:13:17,383 INFO L87 Difference]: Start difference. First operand 168 states and 214 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 18:13:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:17,438 INFO L93 Difference]: Finished difference Result 272 states and 352 transitions. [2024-11-18 18:13:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-18 18:13:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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) Word has length 37 [2024-11-18 18:13:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:17,439 INFO L225 Difference]: With dead ends: 272 [2024-11-18 18:13:17,439 INFO L226 Difference]: Without dead ends: 172 [2024-11-18 18:13:17,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 18:13:17,441 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 34 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:17,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 230 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 18:13:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-18 18:13:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-11-18 18:13:17,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.2781065088757397) internal successors, (216), 169 states have internal predecessors, (216), 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 18:13:17,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 216 transitions. [2024-11-18 18:13:17,446 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 216 transitions. Word has length 37 [2024-11-18 18:13:17,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:17,446 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 216 transitions. [2024-11-18 18:13:17,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 18:13:17,446 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 216 transitions. [2024-11-18 18:13:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-18 18:13:17,447 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:17,447 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:17,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-18 18:13:17,447 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:17,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:17,448 INFO L85 PathProgramCache]: Analyzing trace with hash 786696123, now seen corresponding path program 1 times [2024-11-18 18:13:17,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:17,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497765155] [2024-11-18 18:13:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:17,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:17,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:17,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497765155] [2024-11-18 18:13:17,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497765155] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 18:13:17,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388765768] [2024-11-18 18:13:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:17,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:17,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 18:13:17,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 18:13:17,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 18:13:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:17,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-18 18:13:17,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 18:13:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:18,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 18:13:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:18,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388765768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 18:13:18,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 18:13:18,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2024-11-18 18:13:18,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595732318] [2024-11-18 18:13:18,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 18:13:18,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-18 18:13:18,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:18,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-18 18:13:18,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2024-11-18 18:13:18,856 INFO L87 Difference]: Start difference. First operand 170 states and 216 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 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 18:13:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:19,234 INFO L93 Difference]: Finished difference Result 317 states and 404 transitions. [2024-11-18 18:13:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 18:13:19,234 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 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) Word has length 38 [2024-11-18 18:13:19,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:19,235 INFO L225 Difference]: With dead ends: 317 [2024-11-18 18:13:19,235 INFO L226 Difference]: Without dead ends: 219 [2024-11-18 18:13:19,236 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2024-11-18 18:13:19,236 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 77 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:19,237 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 543 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 18:13:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-18 18:13:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 158. [2024-11-18 18:13:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.2802547770700636) internal successors, (201), 157 states have internal predecessors, (201), 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 18:13:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2024-11-18 18:13:19,241 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 38 [2024-11-18 18:13:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:19,241 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2024-11-18 18:13:19,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 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 18:13:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2024-11-18 18:13:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-18 18:13:19,243 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:19,243 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:19,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-18 18:13:19,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-18 18:13:19,444 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:19,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:19,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1686129263, now seen corresponding path program 1 times [2024-11-18 18:13:19,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:19,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806831900] [2024-11-18 18:13:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:19,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:19,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:19,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806831900] [2024-11-18 18:13:19,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806831900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 18:13:19,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907545390] [2024-11-18 18:13:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:19,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:19,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 18:13:19,723 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 18:13:19,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 18:13:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:19,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-18 18:13:19,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 18:13:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-18 18:13:20,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 18:13:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:20,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907545390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 18:13:20,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 18:13:20,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 9] total 24 [2024-11-18 18:13:20,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868703653] [2024-11-18 18:13:20,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 18:13:20,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-18 18:13:20,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-18 18:13:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2024-11-18 18:13:20,243 INFO L87 Difference]: Start difference. First operand 158 states and 201 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 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 18:13:20,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:20,651 INFO L93 Difference]: Finished difference Result 326 states and 417 transitions. [2024-11-18 18:13:20,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 18:13:20,651 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 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) Word has length 53 [2024-11-18 18:13:20,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:20,652 INFO L225 Difference]: With dead ends: 326 [2024-11-18 18:13:20,652 INFO L226 Difference]: Without dead ends: 228 [2024-11-18 18:13:20,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2024-11-18 18:13:20,654 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 80 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:20,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 360 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 18:13:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-18 18:13:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 193. [2024-11-18 18:13:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.28125) internal successors, (246), 192 states have internal predecessors, (246), 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 18:13:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 246 transitions. [2024-11-18 18:13:20,660 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 246 transitions. Word has length 53 [2024-11-18 18:13:20,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:20,660 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 246 transitions. [2024-11-18 18:13:20,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 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 18:13:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 246 transitions. [2024-11-18 18:13:20,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-18 18:13:20,661 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:20,661 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:20,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 18:13:20,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-18 18:13:20,866 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:20,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:20,867 INFO L85 PathProgramCache]: Analyzing trace with hash 664673192, now seen corresponding path program 1 times [2024-11-18 18:13:20,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:20,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636852593] [2024-11-18 18:13:20,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:20,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:21,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:21,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636852593] [2024-11-18 18:13:21,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636852593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 18:13:21,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519104935] [2024-11-18 18:13:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:21,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:21,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 18:13:21,169 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 18:13:21,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 18:13:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:21,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-18 18:13:21,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 18:13:21,601 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-18 18:13:21,601 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 18:13:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-18 18:13:21,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519104935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 18:13:21,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 18:13:21,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-18 18:13:21,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664045056] [2024-11-18 18:13:21,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 18:13:21,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-18 18:13:21,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:21,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-18 18:13:21,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-11-18 18:13:21,845 INFO L87 Difference]: Start difference. First operand 193 states and 246 transitions. Second operand has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 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 18:13:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:22,416 INFO L93 Difference]: Finished difference Result 488 states and 623 transitions. [2024-11-18 18:13:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 18:13:22,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 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) Word has length 54 [2024-11-18 18:13:22,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:22,419 INFO L225 Difference]: With dead ends: 488 [2024-11-18 18:13:22,419 INFO L226 Difference]: Without dead ends: 353 [2024-11-18 18:13:22,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=838, Unknown=0, NotChecked=0, Total=1056 [2024-11-18 18:13:22,420 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 204 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:22,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 150 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 18:13:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-11-18 18:13:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 193. [2024-11-18 18:13:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.2760416666666667) internal successors, (245), 192 states have internal predecessors, (245), 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 18:13:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 245 transitions. [2024-11-18 18:13:22,434 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 245 transitions. Word has length 54 [2024-11-18 18:13:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:22,435 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 245 transitions. [2024-11-18 18:13:22,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.2) internal successors, (144), 20 states have internal predecessors, (144), 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 18:13:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 245 transitions. [2024-11-18 18:13:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-18 18:13:22,435 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:22,435 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:22,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 18:13:22,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:22,641 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:22,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:22,641 INFO L85 PathProgramCache]: Analyzing trace with hash 356439302, now seen corresponding path program 1 times [2024-11-18 18:13:22,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:22,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571987662] [2024-11-18 18:13:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:22,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:23,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:23,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571987662] [2024-11-18 18:13:23,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571987662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 18:13:23,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160794034] [2024-11-18 18:13:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:23,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:23,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 18:13:23,041 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 18:13:23,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 18:13:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:23,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-18 18:13:23,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 18:13:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 18:13:23,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 18:13:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 18:13:23,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160794034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 18:13:23,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 18:13:23,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-18 18:13:23,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574518829] [2024-11-18 18:13:23,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 18:13:23,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-18 18:13:23,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:23,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-18 18:13:23,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-18 18:13:23,767 INFO L87 Difference]: Start difference. First operand 193 states and 245 transitions. Second operand has 23 states, 23 states have (on average 6.043478260869565) internal successors, (139), 23 states have internal predecessors, (139), 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 18:13:24,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:24,540 INFO L93 Difference]: Finished difference Result 611 states and 758 transitions. [2024-11-18 18:13:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-18 18:13:24,540 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.043478260869565) internal successors, (139), 23 states have internal predecessors, (139), 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) Word has length 55 [2024-11-18 18:13:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:24,541 INFO L225 Difference]: With dead ends: 611 [2024-11-18 18:13:24,542 INFO L226 Difference]: Without dead ends: 464 [2024-11-18 18:13:24,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2024-11-18 18:13:24,543 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 235 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:24,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 250 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-18 18:13:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2024-11-18 18:13:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 281. [2024-11-18 18:13:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.25) internal successors, (350), 280 states have internal predecessors, (350), 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 18:13:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 350 transitions. [2024-11-18 18:13:24,549 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 350 transitions. Word has length 55 [2024-11-18 18:13:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:24,549 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 350 transitions. [2024-11-18 18:13:24,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.043478260869565) internal successors, (139), 23 states have internal predecessors, (139), 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 18:13:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 350 transitions. [2024-11-18 18:13:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-18 18:13:24,550 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:24,550 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:24,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-18 18:13:24,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-18 18:13:24,751 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:24,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1480844755, now seen corresponding path program 1 times [2024-11-18 18:13:24,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:24,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995523291] [2024-11-18 18:13:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 18:13:24,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 18:13:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 18:13:24,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:24,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995523291] [2024-11-18 18:13:24,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995523291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 18:13:24,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 18:13:24,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 18:13:24,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745138172] [2024-11-18 18:13:24,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 18:13:24,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 18:13:24,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 18:13:24,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 18:13:24,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-18 18:13:24,899 INFO L87 Difference]: Start difference. First operand 281 states and 350 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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 18:13:24,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 18:13:24,952 INFO L93 Difference]: Finished difference Result 534 states and 667 transitions. [2024-11-18 18:13:24,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 18:13:24,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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) Word has length 58 [2024-11-18 18:13:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 18:13:24,954 INFO L225 Difference]: With dead ends: 534 [2024-11-18 18:13:24,954 INFO L226 Difference]: Without dead ends: 293 [2024-11-18 18:13:24,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-18 18:13:24,955 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 41 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 18:13:24,955 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 148 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 18:13:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-18 18:13:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 222. [2024-11-18 18:13:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.2669683257918551) internal successors, (280), 221 states have internal predecessors, (280), 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 18:13:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 280 transitions. [2024-11-18 18:13:24,961 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 280 transitions. Word has length 58 [2024-11-18 18:13:24,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 18:13:24,961 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 280 transitions. [2024-11-18 18:13:24,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 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 18:13:24,961 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 280 transitions. [2024-11-18 18:13:24,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-18 18:13:24,962 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 18:13:24,962 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 18:13:24,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-18 18:13:24,962 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 18:13:24,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 18:13:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash -581351902, now seen corresponding path program 2 times [2024-11-18 18:13:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 18:13:24,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051084677] [2024-11-18 18:13:24,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 18:13:24,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 18:13:25,003 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 18:13:25,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 18:13:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:26,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 18:13:26,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051084677] [2024-11-18 18:13:26,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051084677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 18:13:26,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810886519] [2024-11-18 18:13:26,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 18:13:26,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 18:13:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 18:13:26,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 18:13:26,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 18:13:26,450 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 18:13:26,450 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 18:13:26,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-18 18:13:26,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 18:13:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 18:13:43,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 18:14:00,838 WARN L286 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-18 18:14:21,670 WARN L286 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-18 18:14:33,649 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)