./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-programs/copysome1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 ../../../trunk/examples/svcomp/array-programs/copysome1-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 29c11d006ccc17ffcd2d0ed55176947b470e18e4deadd67e8df28761f278f9af --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 19:04:46,856 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 19:04:46,939 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 19:04:46,947 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 19:04:46,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 19:04:46,977 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 19:04:46,978 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 19:04:46,979 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 19:04:46,979 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 19:04:46,984 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 19:04:46,984 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 19:04:46,985 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 19:04:46,986 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 19:04:46,987 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 19:04:46,987 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 19:04:46,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 19:04:46,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 19:04:46,988 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 19:04:46,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 19:04:46,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 19:04:46,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 19:04:46,990 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 19:04:46,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 19:04:46,991 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 19:04:46,991 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 19:04:46,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 19:04:46,991 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 19:04:46,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 19:04:46,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 19:04:46,993 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 19:04:46,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 19:04:46,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 19:04:46,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 19:04:46,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 19:04:46,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 19:04:46,995 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 19:04:46,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 19:04:46,996 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 19:04:46,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 19:04:46,996 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 19:04:46,996 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 19:04:46,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 19:04:46,997 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29c11d006ccc17ffcd2d0ed55176947b470e18e4deadd67e8df28761f278f9af [2023-11-22 19:04:47,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 19:04:47,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 19:04:47,334 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 19:04:47,336 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 19:04:47,336 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 19:04:47,337 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-1.i [2023-11-22 19:04:48,776 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 19:04:48,992 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 19:04:48,993 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i [2023-11-22 19:04:48,999 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8f0d31ba/8c4869c5080b44638ed66a30381b56f0/FLAG6acdb43a5 [2023-11-22 19:04:49,011 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8f0d31ba/8c4869c5080b44638ed66a30381b56f0 [2023-11-22 19:04:49,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 19:04:49,014 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 19:04:49,016 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 19:04:49,016 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 19:04:49,020 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 19:04:49,021 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,022 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f851f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49, skipping insertion in model container [2023-11-22 19:04:49,022 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,041 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 19:04:49,241 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i[806,819] [2023-11-22 19:04:49,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 19:04:49,272 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 19:04:49,286 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i[806,819] [2023-11-22 19:04:49,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 19:04:49,324 INFO L206 MainTranslator]: Completed translation [2023-11-22 19:04:49,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49 WrapperNode [2023-11-22 19:04:49,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 19:04:49,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 19:04:49,327 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 19:04:49,327 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 19:04:49,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,367 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-11-22 19:04:49,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 19:04:49,368 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 19:04:49,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 19:04:49,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 19:04:49,379 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,390 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,414 INFO L189 HeapSplitter]: Split 8 memory accesses to 3 slices as follows [2, 3, 3] [2023-11-22 19:04:49,415 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,415 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,419 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,423 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,427 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 19:04:49,428 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 19:04:49,428 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 19:04:49,428 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 19:04:49,429 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (1/1) ... [2023-11-22 19:04:49,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 19:04:49,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:04:49,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 19:04:49,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 19:04:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 19:04:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 19:04:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 19:04:49,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 19:04:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 19:04:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 19:04:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 19:04:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 19:04:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 19:04:49,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 19:04:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 19:04:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 19:04:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 19:04:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 19:04:49,578 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 19:04:49,579 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 19:04:49,689 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 19:04:49,714 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 19:04:49,715 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-22 19:04:49,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:04:49 BoogieIcfgContainer [2023-11-22 19:04:49,716 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 19:04:49,718 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 19:04:49,718 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 19:04:49,721 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 19:04:49,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 07:04:49" (1/3) ... [2023-11-22 19:04:49,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0a8010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:04:49, skipping insertion in model container [2023-11-22 19:04:49,722 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 07:04:49" (2/3) ... [2023-11-22 19:04:49,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0a8010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 07:04:49, skipping insertion in model container [2023-11-22 19:04:49,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 07:04:49" (3/3) ... [2023-11-22 19:04:49,724 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2023-11-22 19:04:49,738 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 19:04:49,739 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 19:04:49,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 19:04:49,777 INFO L357 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, mHoare=true, 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;@471f6a02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 19:04:49,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 19:04:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 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) [2023-11-22 19:04:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-22 19:04:49,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:04:49,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:04:49,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:04:49,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:04:49,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1300637357, now seen corresponding path program 1 times [2023-11-22 19:04:49,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:04:49,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922994097] [2023-11-22 19:04:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:04:49,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:04:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:04:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 19:04:50,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:04:50,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922994097] [2023-11-22 19:04:50,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922994097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:04:50,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:04:50,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 19:04:50,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914593444] [2023-11-22 19:04:50,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:04:50,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 19:04:50,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:04:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 19:04:50,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:04:50,101 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-11-22 19:04:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:04:50,165 INFO L93 Difference]: Finished difference Result 34 states and 53 transitions. [2023-11-22 19:04:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 19:04:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2023-11-22 19:04:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:04:50,177 INFO L225 Difference]: With dead ends: 34 [2023-11-22 19:04:50,177 INFO L226 Difference]: Without dead ends: 18 [2023-11-22 19:04:50,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 19:04:50,182 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:04:50,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:04:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-22 19:04:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2023-11-22 19:04:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2023-11-22 19:04:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-22 19:04:50,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2023-11-22 19:04:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:04:50,207 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-22 19:04:50,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-11-22 19:04:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-22 19:04:50,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-22 19:04:50,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:04:50,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:04:50,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 19:04:50,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:04:50,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:04:50,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1547209917, now seen corresponding path program 1 times [2023-11-22 19:04:50,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:04:50,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385340351] [2023-11-22 19:04:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:04:50,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:04:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:04:50,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 19:04:50,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:04:50,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385340351] [2023-11-22 19:04:50,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385340351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:04:50,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430762180] [2023-11-22 19:04:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:04:50,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:04:50,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:04:50,305 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) [2023-11-22 19:04:50,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 19:04:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:04:50,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 19:04:50,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:04:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 19:04:50,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:04:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 19:04:50,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430762180] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:04:50,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:04:50,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-22 19:04:50,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337018036] [2023-11-22 19:04:50,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:04:50,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-22 19:04:50,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:04:50,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-22 19:04:50,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 19:04:50,467 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-11-22 19:04:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:04:50,514 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2023-11-22 19:04:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 19:04:50,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 13 [2023-11-22 19:04:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:04:50,516 INFO L225 Difference]: With dead ends: 41 [2023-11-22 19:04:50,516 INFO L226 Difference]: Without dead ends: 28 [2023-11-22 19:04:50,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-22 19:04:50,517 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:04:50,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:04:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-22 19:04:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-22 19:04:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 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) [2023-11-22 19:04:50,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-22 19:04:50,523 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 13 [2023-11-22 19:04:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:04:50,536 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-22 19:04:50,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-11-22 19:04:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-22 19:04:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 19:04:50,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:04:50,538 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:04:50,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-22 19:04:50,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:04:50,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:04:50,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:04:50,740 INFO L85 PathProgramCache]: Analyzing trace with hash -845296322, now seen corresponding path program 2 times [2023-11-22 19:04:50,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:04:50,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965832192] [2023-11-22 19:04:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:04:50,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:04:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:04:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 19:04:51,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:04:51,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965832192] [2023-11-22 19:04:51,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965832192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:04:51,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656691305] [2023-11-22 19:04:51,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 19:04:51,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:04:51,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:04:51,004 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) [2023-11-22 19:04:51,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 19:04:51,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 19:04:51,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:04:51,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 19:04:51,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:04:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 19:04:51,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:04:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 19:04:51,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656691305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:04:51,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:04:51,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-22 19:04:51,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033925231] [2023-11-22 19:04:51,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:04:51,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-22 19:04:51,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:04:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-22 19:04:51,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-22 19:04:51,236 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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) [2023-11-22 19:04:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:04:51,349 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2023-11-22 19:04:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 19:04:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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 25 [2023-11-22 19:04:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:04:51,354 INFO L225 Difference]: With dead ends: 74 [2023-11-22 19:04:51,354 INFO L226 Difference]: Without dead ends: 52 [2023-11-22 19:04:51,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-22 19:04:51,358 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 19:04:51,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 30 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 19:04:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-22 19:04:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-22 19:04:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 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) [2023-11-22 19:04:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2023-11-22 19:04:51,373 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 25 [2023-11-22 19:04:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:04:51,373 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2023-11-22 19:04:51,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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) [2023-11-22 19:04:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2023-11-22 19:04:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-22 19:04:51,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:04:51,375 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:04:51,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 19:04:51,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-22 19:04:51,593 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:04:51,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:04:51,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1362221730, now seen corresponding path program 3 times [2023-11-22 19:04:51,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:04:51,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015078585] [2023-11-22 19:04:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:04:51,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:04:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:04:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-22 19:04:51,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:04:51,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015078585] [2023-11-22 19:04:51,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015078585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:04:51,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350406277] [2023-11-22 19:04:51,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 19:04:51,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:04:51,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:04:51,981 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) [2023-11-22 19:04:51,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 19:04:52,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-22 19:04:52,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:04:52,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 19:04:52,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:04:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-22 19:04:52,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:04:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 19:04:52,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350406277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:04:52,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:04:52,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-22 19:04:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347460681] [2023-11-22 19:04:52,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:04:52,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 19:04:52,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:04:52,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 19:04:52,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-22 19:04:52,617 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2023-11-22 19:04:52,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:04:52,806 INFO L93 Difference]: Finished difference Result 140 states and 201 transitions. [2023-11-22 19:04:52,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-22 19:04:52,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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 49 [2023-11-22 19:04:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:04:52,809 INFO L225 Difference]: With dead ends: 140 [2023-11-22 19:04:52,810 INFO L226 Difference]: Without dead ends: 100 [2023-11-22 19:04:52,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-22 19:04:52,813 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 220 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 19:04:52,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 48 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 19:04:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-22 19:04:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-22 19:04:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 99 states have internal predecessors, (125), 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) [2023-11-22 19:04:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2023-11-22 19:04:52,841 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 49 [2023-11-22 19:04:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:04:52,841 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2023-11-22 19:04:52,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2023-11-22 19:04:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2023-11-22 19:04:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-22 19:04:52,846 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:04:52,846 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:04:52,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 19:04:53,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:04:53,068 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:04:53,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:04:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2054479262, now seen corresponding path program 4 times [2023-11-22 19:04:53,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:04:53,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510490731] [2023-11-22 19:04:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:04:53,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:04:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:04:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-11-22 19:04:53,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:04:53,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510490731] [2023-11-22 19:04:53,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510490731] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:04:53,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124984754] [2023-11-22 19:04:53,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 19:04:53,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:04:53,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:04:53,983 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) [2023-11-22 19:04:54,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 19:04:54,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 19:04:54,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:04:54,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-22 19:04:54,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:04:54,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-22 19:04:54,223 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,286 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,337 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,382 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,428 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,476 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,529 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,577 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,627 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,677 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,741 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,797 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,849 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,905 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:54,963 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:54,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:55,029 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:55,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:55,089 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:55,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:55,142 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:55,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:55,200 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:55,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:55,274 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:55,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:55,336 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-22 19:04:55,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2023-11-22 19:04:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 610 proven. 105 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-11-22 19:04:55,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:04:56,425 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-22 19:04:56,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-11-22 19:04:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 20 proven. 125 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2023-11-22 19:04:56,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124984754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:04:56,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:04:56,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28, 10] total 54 [2023-11-22 19:04:56,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198747780] [2023-11-22 19:04:56,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:04:56,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-22 19:04:56,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:04:56,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-22 19:04:56,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=2177, Unknown=0, NotChecked=0, Total=2862 [2023-11-22 19:04:56,435 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 54 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) [2023-11-22 19:04:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:04:57,303 INFO L93 Difference]: Finished difference Result 265 states and 346 transitions. [2023-11-22 19:04:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-22 19:04:57,304 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 54 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 97 [2023-11-22 19:04:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:04:57,305 INFO L225 Difference]: With dead ends: 265 [2023-11-22 19:04:57,305 INFO L226 Difference]: Without dead ends: 189 [2023-11-22 19:04:57,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 143 SyntacticMatches, 21 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1383, Invalid=4623, Unknown=0, NotChecked=0, Total=6006 [2023-11-22 19:04:57,308 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 450 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 19:04:57,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 92 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 19:04:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-22 19:04:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2023-11-22 19:04:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.2914285714285714) internal successors, (226), 175 states have internal predecessors, (226), 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) [2023-11-22 19:04:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 226 transitions. [2023-11-22 19:04:57,321 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 226 transitions. Word has length 97 [2023-11-22 19:04:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:04:57,321 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 226 transitions. [2023-11-22 19:04:57,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 54 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) [2023-11-22 19:04:57,322 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 226 transitions. [2023-11-22 19:04:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-22 19:04:57,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:04:57,323 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:04:57,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 19:04:57,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:04:57,538 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:04:57,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:04:57,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1071930527, now seen corresponding path program 1 times [2023-11-22 19:04:57,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:04:57,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912609501] [2023-11-22 19:04:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:04:57,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:04:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:04:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 1013 trivial. 0 not checked. [2023-11-22 19:04:57,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:04:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912609501] [2023-11-22 19:04:57,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912609501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:04:57,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:04:57,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:04:57,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649993227] [2023-11-22 19:04:57,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:04:57,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:04:57,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:04:57,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:04:57,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 19:04:57,749 INFO L87 Difference]: Start difference. First operand 176 states and 226 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2023-11-22 19:04:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:04:57,770 INFO L93 Difference]: Finished difference Result 183 states and 234 transitions. [2023-11-22 19:04:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 19:04:57,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 101 [2023-11-22 19:04:57,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:04:57,772 INFO L225 Difference]: With dead ends: 183 [2023-11-22 19:04:57,772 INFO L226 Difference]: Without dead ends: 107 [2023-11-22 19:04:57,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 19:04:57,773 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:04:57,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:04:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-22 19:04:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-22 19:04:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2547169811320755) internal successors, (133), 106 states have internal predecessors, (133), 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) [2023-11-22 19:04:57,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2023-11-22 19:04:57,786 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 101 [2023-11-22 19:04:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:04:57,787 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2023-11-22 19:04:57,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2023-11-22 19:04:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2023-11-22 19:04:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-22 19:04:57,792 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:04:57,793 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:04:57,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-22 19:04:57,793 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:04:57,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:04:57,794 INFO L85 PathProgramCache]: Analyzing trace with hash -474033708, now seen corresponding path program 1 times [2023-11-22 19:04:57,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:04:57,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724946320] [2023-11-22 19:04:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:04:57,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:04:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:04:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1060 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2023-11-22 19:04:57,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:04:57,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724946320] [2023-11-22 19:04:57,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724946320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 19:04:57,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 19:04:57,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 19:04:57,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580336230] [2023-11-22 19:04:57,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 19:04:57,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 19:04:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:04:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 19:04:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 19:04:57,986 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2023-11-22 19:04:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:04:58,006 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2023-11-22 19:04:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-22 19:04:58,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 104 [2023-11-22 19:04:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:04:58,008 INFO L225 Difference]: With dead ends: 116 [2023-11-22 19:04:58,008 INFO L226 Difference]: Without dead ends: 109 [2023-11-22 19:04:58,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-22 19:04:58,010 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 19:04:58,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 19:04:58,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-22 19:04:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2023-11-22 19:04:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2452830188679245) internal successors, (132), 106 states have internal predecessors, (132), 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) [2023-11-22 19:04:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 132 transitions. [2023-11-22 19:04:58,023 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 132 transitions. Word has length 104 [2023-11-22 19:04:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:04:58,024 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 132 transitions. [2023-11-22 19:04:58,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2023-11-22 19:04:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 132 transitions. [2023-11-22 19:04:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-22 19:04:58,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:04:58,027 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:04:58,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-22 19:04:58,027 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:04:58,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:04:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash -363876066, now seen corresponding path program 1 times [2023-11-22 19:04:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:04:58,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084122013] [2023-11-22 19:04:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:04:58,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:04:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:04:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2023-11-22 19:04:58,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:04:58,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084122013] [2023-11-22 19:04:58,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084122013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:04:58,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125317541] [2023-11-22 19:04:58,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:04:58,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:04:58,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:04:58,785 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) [2023-11-22 19:04:58,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 19:04:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:04:58,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-22 19:04:59,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:04:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2023-11-22 19:04:59,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:04:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2023-11-22 19:04:59,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125317541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:04:59,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:04:59,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-11-22 19:04:59,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398632015] [2023-11-22 19:04:59,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:04:59,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-22 19:04:59,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:04:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-22 19:04:59,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-11-22 19:04:59,818 INFO L87 Difference]: Start difference. First operand 107 states and 132 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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) [2023-11-22 19:05:00,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:05:00,230 INFO L93 Difference]: Finished difference Result 289 states and 413 transitions. [2023-11-22 19:05:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-22 19:05:00,231 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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 106 [2023-11-22 19:05:00,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:05:00,232 INFO L225 Difference]: With dead ends: 289 [2023-11-22 19:05:00,232 INFO L226 Difference]: Without dead ends: 207 [2023-11-22 19:05:00,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-11-22 19:05:00,234 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 486 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 19:05:00,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 66 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 19:05:00,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-22 19:05:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2023-11-22 19:05:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2475728155339805) internal successors, (257), 206 states have internal predecessors, (257), 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) [2023-11-22 19:05:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2023-11-22 19:05:00,245 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 106 [2023-11-22 19:05:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:05:00,245 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2023-11-22 19:05:00,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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) [2023-11-22 19:05:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2023-11-22 19:05:00,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-22 19:05:00,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:05:00,247 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:05:00,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-22 19:05:00,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:05:00,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:05:00,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:05:00,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1831221155, now seen corresponding path program 2 times [2023-11-22 19:05:00,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:05:00,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023504621] [2023-11-22 19:05:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:05:00,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:05:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:05:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4611 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 3435 trivial. 0 not checked. [2023-11-22 19:05:03,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:05:03,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023504621] [2023-11-22 19:05:03,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023504621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:05:03,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455030029] [2023-11-22 19:05:03,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 19:05:03,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:05:03,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:05:03,064 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) [2023-11-22 19:05:03,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 19:05:03,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 19:05:03,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 19:05:03,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-22 19:05:03,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 19:05:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4611 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 3435 trivial. 0 not checked. [2023-11-22 19:05:03,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 19:05:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4611 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 3435 trivial. 0 not checked. [2023-11-22 19:05:06,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455030029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 19:05:06,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 19:05:06,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-11-22 19:05:06,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411040201] [2023-11-22 19:05:06,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 19:05:06,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-22 19:05:06,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 19:05:06,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-22 19:05:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-11-22 19:05:06,251 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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) [2023-11-22 19:05:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 19:05:07,981 INFO L93 Difference]: Finished difference Result 564 states and 813 transitions. [2023-11-22 19:05:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-22 19:05:07,981 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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 206 [2023-11-22 19:05:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 19:05:07,983 INFO L225 Difference]: With dead ends: 564 [2023-11-22 19:05:07,983 INFO L226 Difference]: Without dead ends: 407 [2023-11-22 19:05:07,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-11-22 19:05:07,986 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1340 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-22 19:05:07,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 39 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-22 19:05:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-11-22 19:05:08,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2023-11-22 19:05:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 1.248768472906404) internal successors, (507), 406 states have internal predecessors, (507), 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) [2023-11-22 19:05:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 507 transitions. [2023-11-22 19:05:08,003 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 507 transitions. Word has length 206 [2023-11-22 19:05:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 19:05:08,004 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 507 transitions. [2023-11-22 19:05:08,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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) [2023-11-22 19:05:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 507 transitions. [2023-11-22 19:05:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2023-11-22 19:05:08,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 19:05:08,009 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 98, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 19:05:08,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 19:05:08,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:05:08,225 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 19:05:08,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 19:05:08,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1994097341, now seen corresponding path program 3 times [2023-11-22 19:05:08,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 19:05:08,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174118982] [2023-11-22 19:05:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 19:05:08,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 19:05:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 19:05:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 19211 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 14360 trivial. 0 not checked. [2023-11-22 19:05:16,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 19:05:16,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174118982] [2023-11-22 19:05:16,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174118982] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 19:05:16,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955960771] [2023-11-22 19:05:16,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 19:05:16,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 19:05:16,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 19:05:16,489 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) [2023-11-22 19:05:16,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Killed by 15