./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c -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 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 19:53:49,670 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 19:53:49,737 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 19:53:49,741 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 19:53:49,741 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 19:53:49,773 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 19:53:49,774 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 19:53:49,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 19:53:49,775 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 19:53:49,777 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 19:53:49,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 19:53:49,778 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 19:53:49,778 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 19:53:49,779 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 19:53:49,779 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 19:53:49,781 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 19:53:49,781 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 19:53:49,781 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 19:53:49,781 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 19:53:49,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 19:53:49,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 19:53:49,782 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 19:53:49,783 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 19:53:49,783 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 19:53:49,783 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 19:53:49,783 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 19:53:49,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 19:53:49,787 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 19:53:49,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 19:53:49,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 19:53:49,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 19:53:49,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 19:53:49,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:53:49,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 19:53:49,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 19:53:49,788 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 19:53:49,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 19:53:49,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 19:53:49,789 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 19:53:49,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 19:53:49,789 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 19:53:49,791 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 19:53:49,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f [2024-10-23 19:53:50,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 19:53:50,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 19:53:50,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 19:53:50,077 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 19:53:50,077 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 19:53:50,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c [2024-10-23 19:53:51,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 19:53:51,712 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 19:53:51,713 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c [2024-10-23 19:53:51,722 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7848650b/d4359ea76aff4c8d9a7fa58ebf5803f1/FLAG2c3777f05 [2024-10-23 19:53:52,070 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7848650b/d4359ea76aff4c8d9a7fa58ebf5803f1 [2024-10-23 19:53:52,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 19:53:52,074 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 19:53:52,075 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 19:53:52,075 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 19:53:52,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 19:53:52,081 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,082 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a4829df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52, skipping insertion in model container [2024-10-23 19:53:52,082 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,099 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 19:53:52,275 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2024-10-23 19:53:52,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:53:52,298 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 19:53:52,310 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c[402,415] [2024-10-23 19:53:52,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:53:52,332 INFO L204 MainTranslator]: Completed translation [2024-10-23 19:53:52,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52 WrapperNode [2024-10-23 19:53:52,333 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 19:53:52,334 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 19:53:52,334 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 19:53:52,334 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 19:53:52,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,346 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,364 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2024-10-23 19:53:52,364 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 19:53:52,365 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 19:53:52,365 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 19:53:52,365 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 19:53:52,374 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,376 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,388 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-23 19:53:52,388 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,388 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,393 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,399 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,401 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,404 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,406 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 19:53:52,409 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 19:53:52,410 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 19:53:52,410 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 19:53:52,411 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (1/1) ... [2024-10-23 19:53:52,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:53:52,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:53:52,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-23 19:53:52,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-23 19:53:52,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 19:53:52,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 19:53:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-23 19:53:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-23 19:53:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-23 19:53:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-23 19:53:52,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 19:53:52,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 19:53:52,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-23 19:53:52,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-23 19:53:52,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-23 19:53:52,609 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 19:53:52,611 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 19:53:52,781 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-10-23 19:53:52,781 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 19:53:52,825 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 19:53:52,829 INFO L314 CfgBuilder]: Removed 5 assume(true) statements. [2024-10-23 19:53:52,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:53:52 BoogieIcfgContainer [2024-10-23 19:53:52,830 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 19:53:52,832 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 19:53:52,832 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 19:53:52,838 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 19:53:52,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:53:52" (1/3) ... [2024-10-23 19:53:52,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5725ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:53:52, skipping insertion in model container [2024-10-23 19:53:52,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:53:52" (2/3) ... [2024-10-23 19:53:52,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5725ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:53:52, skipping insertion in model container [2024-10-23 19:53:52,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:53:52" (3/3) ... [2024-10-23 19:53:52,842 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2024-10-23 19:53:52,856 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 19:53:52,858 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 19:53:52,919 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 19:53:52,926 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67f148ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 19:53:52,927 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 19:53:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-23 19:53:52,938 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:52,938 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:53:52,939 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:52,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1123727691, now seen corresponding path program 1 times [2024-10-23 19:53:52,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:52,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485431982] [2024-10-23 19:53:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:52,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:53:53,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:53,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485431982] [2024-10-23 19:53:53,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485431982] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:53:53,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:53:53,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 19:53:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593783444] [2024-10-23 19:53:53,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:53:53,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-23 19:53:53,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:53,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-23 19:53:53,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-23 19:53:53,147 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 17 states have internal predecessors, (29), 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 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:53,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:53,180 INFO L93 Difference]: Finished difference Result 33 states and 52 transitions. [2024-10-23 19:53:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-23 19:53:53,183 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2024-10-23 19:53:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:53,190 INFO L225 Difference]: With dead ends: 33 [2024-10-23 19:53:53,190 INFO L226 Difference]: Without dead ends: 15 [2024-10-23 19:53:53,193 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-23 19:53:53,196 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:53:53,197 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:53:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-23 19:53:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-23 19:53:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:53,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2024-10-23 19:53:53,226 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 14 [2024-10-23 19:53:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:53,227 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2024-10-23 19:53:53,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2024-10-23 19:53:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-23 19:53:53,228 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:53,228 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:53:53,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 19:53:53,229 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:53,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash 349231377, now seen corresponding path program 1 times [2024-10-23 19:53:53,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:53,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32702794] [2024-10-23 19:53:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:53,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:53:53,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:53,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32702794] [2024-10-23 19:53:53,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32702794] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:53:53,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:53:53,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 19:53:53,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636493390] [2024-10-23 19:53:53,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:53:53,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:53:53,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:53:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:53:53,372 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:53,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:53,399 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2024-10-23 19:53:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:53:53,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2024-10-23 19:53:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:53,401 INFO L225 Difference]: With dead ends: 28 [2024-10-23 19:53:53,401 INFO L226 Difference]: Without dead ends: 16 [2024-10-23 19:53:53,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:53:53,402 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:53:53,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:53:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-23 19:53:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-23 19:53:53,406 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) [2024-10-23 19:53:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-10-23 19:53:53,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2024-10-23 19:53:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:53,408 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-10-23 19:53:53,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-10-23 19:53:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-23 19:53:53,409 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:53,409 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:53:53,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-23 19:53:53,409 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:53,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:53,410 INFO L85 PathProgramCache]: Analyzing trace with hash 261767879, now seen corresponding path program 1 times [2024-10-23 19:53:53,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:53,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072435354] [2024-10-23 19:53:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:53,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-23 19:53:53,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:53,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072435354] [2024-10-23 19:53:53,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072435354] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:53:53,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:53:53,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-23 19:53:53,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219240980] [2024-10-23 19:53:53,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:53:53,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 19:53:53,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:53,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 19:53:53,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:53:53,536 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:53,592 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2024-10-23 19:53:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:53:53,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-23 19:53:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:53,594 INFO L225 Difference]: With dead ends: 30 [2024-10-23 19:53:53,594 INFO L226 Difference]: Without dead ends: 20 [2024-10-23 19:53:53,594 INFO L431 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 [2024-10-23 19:53:53,595 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:53:53,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:53:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-23 19:53:53,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-23 19:53:53,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2024-10-23 19:53:53,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-23 19:53:53,605 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2024-10-23 19:53:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:53,606 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-23 19:53:53,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:53,606 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-23 19:53:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-23 19:53:53,607 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:53,607 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:53:53,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-23 19:53:53,608 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:53,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1326628341, now seen corresponding path program 1 times [2024-10-23 19:53:53,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:53,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524723406] [2024-10-23 19:53:53,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:53,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 19:53:53,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:53,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524723406] [2024-10-23 19:53:53,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524723406] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:53:53,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889387431] [2024-10-23 19:53:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:53,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:53,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:53:53,790 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:53:53,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 19:53:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:53,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:53:53,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:53:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 19:53:53,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:53:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 19:53:53,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889387431] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:53:53,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:53:53,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-23 19:53:53,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615750761] [2024-10-23 19:53:53,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:53:53,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-23 19:53:53,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:53,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-23 19:53:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:53:53,994 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2024-10-23 19:53:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:54,050 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-10-23 19:53:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:53:54,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 19 [2024-10-23 19:53:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:54,051 INFO L225 Difference]: With dead ends: 37 [2024-10-23 19:53:54,052 INFO L226 Difference]: Without dead ends: 21 [2024-10-23 19:53:54,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:53:54,055 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:53:54,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:53:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-23 19:53:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-23 19:53:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-10-23 19:53:54,063 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2024-10-23 19:53:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:54,064 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-10-23 19:53:54,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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) [2024-10-23 19:53:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-10-23 19:53:54,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-23 19:53:54,065 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:54,065 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:53:54,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-23 19:53:54,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:54,270 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:54,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:54,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1865382421, now seen corresponding path program 2 times [2024-10-23 19:53:54,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:54,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528993148] [2024-10-23 19:53:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:54,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:53:54,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:54,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528993148] [2024-10-23 19:53:54,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528993148] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:53:54,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167561332] [2024-10-23 19:53:54,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:53:54,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:54,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:53:54,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:53:54,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 19:53:54,464 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:53:54,464 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:53:54,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:53:54,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:53:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:53:54,514 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:53:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:53:54,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167561332] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:53:54,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:53:54,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-10-23 19:53:54,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608831302] [2024-10-23 19:53:54,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:53:54,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-23 19:53:54,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:54,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-23 19:53:54,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-23 19:53:54,551 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2024-10-23 19:53:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:54,616 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2024-10-23 19:53:54,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-23 19:53:54,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 20 [2024-10-23 19:53:54,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:54,618 INFO L225 Difference]: With dead ends: 38 [2024-10-23 19:53:54,619 INFO L226 Difference]: Without dead ends: 25 [2024-10-23 19:53:54,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-23 19:53:54,620 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:53:54,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:53:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-23 19:53:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-23 19:53:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-23 19:53:54,626 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2024-10-23 19:53:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:54,629 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-23 19:53:54,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2024-10-23 19:53:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-23 19:53:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-23 19:53:54,629 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:54,630 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:53:54,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-23 19:53:54,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:54,831 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:54,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash 909538577, now seen corresponding path program 3 times [2024-10-23 19:53:54,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:54,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95207132] [2024-10-23 19:53:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:54,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:53:56,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:56,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95207132] [2024-10-23 19:53:56,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95207132] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:53:56,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166275942] [2024-10-23 19:53:56,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:53:56,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:56,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:53:56,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:53:56,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 19:53:56,230 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-23 19:53:56,231 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:53:56,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-23 19:53:56,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:53:56,291 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 1 [2024-10-23 19:53:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:53:56,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:53:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 19:53:56,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166275942] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:53:56,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:53:56,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 27 [2024-10-23 19:53:56,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117753053] [2024-10-23 19:53:56,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:53:56,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-23 19:53:56,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:56,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-23 19:53:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2024-10-23 19:53:56,811 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:57,103 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2024-10-23 19:53:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-23 19:53:57,103 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 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 24 [2024-10-23 19:53:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:57,104 INFO L225 Difference]: With dead ends: 42 [2024-10-23 19:53:57,104 INFO L226 Difference]: Without dead ends: 38 [2024-10-23 19:53:57,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2024-10-23 19:53:57,108 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-23 19:53:57,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 123 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-23 19:53:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-23 19:53:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2024-10-23 19:53:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-10-23 19:53:57,122 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2024-10-23 19:53:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:57,123 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-10-23 19:53:57,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-10-23 19:53:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-23 19:53:57,124 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:57,124 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:53:57,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-23 19:53:57,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:57,325 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:57,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:57,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1120376093, now seen corresponding path program 4 times [2024-10-23 19:53:57,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:57,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99986195] [2024-10-23 19:53:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:57,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-23 19:53:57,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:57,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99986195] [2024-10-23 19:53:57,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99986195] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:53:57,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576040320] [2024-10-23 19:53:57,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:53:57,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:57,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:53:57,446 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:53:57,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 19:53:57,499 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:53:57,499 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:53:57,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-23 19:53:57,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:53:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-23 19:53:57,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:53:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-23 19:53:57,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576040320] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:53:57,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:53:57,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-10-23 19:53:57,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166335763] [2024-10-23 19:53:57,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:53:57,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-23 19:53:57,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:57,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-23 19:53:57,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-10-23 19:53:57,653 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) [2024-10-23 19:53:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:57,806 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2024-10-23 19:53:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-23 19:53:57,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) Word has length 25 [2024-10-23 19:53:57,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:57,808 INFO L225 Difference]: With dead ends: 75 [2024-10-23 19:53:57,808 INFO L226 Difference]: Without dead ends: 42 [2024-10-23 19:53:57,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-10-23 19:53:57,809 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:53:57,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 33 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:53:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-23 19:53:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2024-10-23 19:53:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-10-23 19:53:57,822 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2024-10-23 19:53:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:57,822 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-10-23 19:53:57,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) [2024-10-23 19:53:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-10-23 19:53:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-23 19:53:57,824 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:57,825 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:53:57,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-23 19:53:58,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:58,025 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:58,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash -209725766, now seen corresponding path program 5 times [2024-10-23 19:53:58,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:58,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353838041] [2024-10-23 19:53:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:58,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:53:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:53:58,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:53:58,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353838041] [2024-10-23 19:53:58,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353838041] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:53:58,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717181398] [2024-10-23 19:53:58,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 19:53:58,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:58,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:53:58,139 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:53:58,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 19:53:58,203 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-23 19:53:58,203 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:53:58,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-23 19:53:58,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:53:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:53:58,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:53:58,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:53:58,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717181398] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:53:58,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:53:58,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-10-23 19:53:58,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901093834] [2024-10-23 19:53:58,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:53:58,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-23 19:53:58,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:53:58,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-23 19:53:58,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-10-23 19:53:58,355 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:58,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:53:58,437 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-10-23 19:53:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-23 19:53:58,438 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 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 26 [2024-10-23 19:53:58,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:53:58,438 INFO L225 Difference]: With dead ends: 42 [2024-10-23 19:53:58,438 INFO L226 Difference]: Without dead ends: 30 [2024-10-23 19:53:58,439 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-23 19:53:58,439 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:53:58,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 29 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:53:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-23 19:53:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-10-23 19:53:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:58,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-10-23 19:53:58,446 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 26 [2024-10-23 19:53:58,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:53:58,447 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-10-23 19:53:58,447 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:53:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-10-23 19:53:58,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-23 19:53:58,448 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:53:58,448 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:53:58,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-23 19:53:58,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:53:58,649 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:53:58,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:53:58,650 INFO L85 PathProgramCache]: Analyzing trace with hash -360312821, now seen corresponding path program 6 times [2024-10-23 19:53:58,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:53:58,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429468734] [2024-10-23 19:53:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:53:58,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:53:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:54:00,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:00,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429468734] [2024-10-23 19:54:00,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429468734] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:00,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252663330] [2024-10-23 19:54:00,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 19:54:00,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:00,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:00,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:00,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-23 19:54:00,446 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-23 19:54:00,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:00,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-10-23 19:54:00,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:00,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:01,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-23 19:54:01,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2024-10-23 19:54:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 19:54:01,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252663330] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:01,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:01,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 50 [2024-10-23 19:54:01,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611003846] [2024-10-23 19:54:01,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:01,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-10-23 19:54:01,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-10-23 19:54:01,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2024-10-23 19:54:01,843 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:02,779 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2024-10-23 19:54:02,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-23 19:54:02,779 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 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 29 [2024-10-23 19:54:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:02,780 INFO L225 Difference]: With dead ends: 50 [2024-10-23 19:54:02,780 INFO L226 Difference]: Without dead ends: 46 [2024-10-23 19:54:02,782 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=236, Invalid=3070, Unknown=0, NotChecked=0, Total=3306 [2024-10-23 19:54:02,784 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:02,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 116 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-23 19:54:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-23 19:54:02,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2024-10-23 19:54:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2024-10-23 19:54:02,798 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 29 [2024-10-23 19:54:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:02,799 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2024-10-23 19:54:02,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2024-10-23 19:54:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-23 19:54:02,799 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:02,800 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:02,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-23 19:54:03,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:03,000 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:03,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:03,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1171913621, now seen corresponding path program 7 times [2024-10-23 19:54:03,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:03,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371875107] [2024-10-23 19:54:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:03,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 19:54:03,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:03,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371875107] [2024-10-23 19:54:03,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371875107] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:03,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268162832] [2024-10-23 19:54:03,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 19:54:03,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:03,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:03,123 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:03,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-23 19:54:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:03,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-23 19:54:03,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 19:54:03,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-23 19:54:03,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268162832] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:03,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:03,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-23 19:54:03,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632394525] [2024-10-23 19:54:03,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:03,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-23 19:54:03,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:03,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-23 19:54:03,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-10-23 19:54:03,339 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:03,442 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2024-10-23 19:54:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-23 19:54:03,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-23 19:54:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:03,443 INFO L225 Difference]: With dead ends: 84 [2024-10-23 19:54:03,443 INFO L226 Difference]: Without dead ends: 44 [2024-10-23 19:54:03,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-10-23 19:54:03,444 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:03,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:54:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-23 19:54:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-23 19:54:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2024-10-23 19:54:03,451 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 30 [2024-10-23 19:54:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:03,452 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2024-10-23 19:54:03,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2024-10-23 19:54:03,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-23 19:54:03,453 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:03,453 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:03,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-23 19:54:03,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:03,658 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:03,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:03,658 INFO L85 PathProgramCache]: Analyzing trace with hash 130105889, now seen corresponding path program 8 times [2024-10-23 19:54:03,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:03,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198344560] [2024-10-23 19:54:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:03,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-23 19:54:03,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:03,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198344560] [2024-10-23 19:54:03,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198344560] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:03,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586090890] [2024-10-23 19:54:03,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:54:03,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:03,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:03,791 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:03,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-23 19:54:03,857 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:54:03,857 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:03,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-23 19:54:03,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-23 19:54:03,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-23 19:54:03,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586090890] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:03,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:03,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-10-23 19:54:03,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895802075] [2024-10-23 19:54:03,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:03,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-23 19:54:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-23 19:54:03,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-10-23 19:54:03,996 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:04,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:04,095 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2024-10-23 19:54:04,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-23 19:54:04,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-10-23 19:54:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:04,096 INFO L225 Difference]: With dead ends: 62 [2024-10-23 19:54:04,096 INFO L226 Difference]: Without dead ends: 35 [2024-10-23 19:54:04,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-10-23 19:54:04,097 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:04,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:54:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-23 19:54:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-10-23 19:54:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-10-23 19:54:04,102 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2024-10-23 19:54:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:04,102 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-10-23 19:54:04,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-10-23 19:54:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-23 19:54:04,103 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:04,103 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:04,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-23 19:54:04,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-23 19:54:04,304 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:04,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:04,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1688059631, now seen corresponding path program 9 times [2024-10-23 19:54:04,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:04,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442512864] [2024-10-23 19:54:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:04,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:54:06,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:06,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442512864] [2024-10-23 19:54:06,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442512864] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:06,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36400770] [2024-10-23 19:54:06,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:54:06,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:06,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:06,551 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:06,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-23 19:54:06,628 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-23 19:54:06,628 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:06,630 WARN L253 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-10-23 19:54:06,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:06,700 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 1 [2024-10-23 19:54:07,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-23 19:54:07,994 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 15 treesize of output 14 [2024-10-23 19:54:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:54:08,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:37,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-10-23 19:54:37,588 INFO L349 Elim1Store]: treesize reduction 10, result has 63.0 percent of original size [2024-10-23 19:54:37,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 69 [2024-10-23 19:54:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:54:37,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36400770] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:37,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:37,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 33] total 84 [2024-10-23 19:54:37,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623223037] [2024-10-23 19:54:37,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:37,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-10-23 19:54:37,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:37,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-10-23 19:54:37,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=6464, Unknown=8, NotChecked=0, Total=6972 [2024-10-23 19:54:37,999 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 84 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:42,017 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2024-10-23 19:54:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-10-23 19:54:42,017 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-23 19:54:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:42,019 INFO L225 Difference]: With dead ends: 84 [2024-10-23 19:54:42,019 INFO L226 Difference]: Without dead ends: 79 [2024-10-23 19:54:42,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=872, Invalid=12002, Unknown=8, NotChecked=0, Total=12882 [2024-10-23 19:54:42,022 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:42,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 177 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-23 19:54:42,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-23 19:54:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2024-10-23 19:54:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-10-23 19:54:42,036 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 34 [2024-10-23 19:54:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:42,037 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-10-23 19:54:42,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-10-23 19:54:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-23 19:54:42,038 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:42,038 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:42,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-23 19:54:42,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:42,239 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:42,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1559355427, now seen corresponding path program 10 times [2024-10-23 19:54:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:42,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771236218] [2024-10-23 19:54:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-23 19:54:42,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:42,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771236218] [2024-10-23 19:54:42,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771236218] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:42,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136396434] [2024-10-23 19:54:42,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:54:42,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:42,413 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:42,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-23 19:54:42,479 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:54:42,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:42,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-23 19:54:42,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-23 19:54:42,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-23 19:54:42,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136396434] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:42,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:42,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-10-23 19:54:42,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871655679] [2024-10-23 19:54:42,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:42,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-23 19:54:42,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:42,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-23 19:54:42,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-10-23 19:54:42,789 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:43,025 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2024-10-23 19:54:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-23 19:54:43,026 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-10-23 19:54:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:43,027 INFO L225 Difference]: With dead ends: 103 [2024-10-23 19:54:43,027 INFO L226 Difference]: Without dead ends: 56 [2024-10-23 19:54:43,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2024-10-23 19:54:43,028 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:43,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 39 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 19:54:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-23 19:54:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2024-10-23 19:54:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-10-23 19:54:43,046 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 35 [2024-10-23 19:54:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:43,046 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-10-23 19:54:43,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-10-23 19:54:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-23 19:54:43,047 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:43,048 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:43,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-23 19:54:43,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-23 19:54:43,249 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:43,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:43,251 INFO L85 PathProgramCache]: Analyzing trace with hash 230767034, now seen corresponding path program 11 times [2024-10-23 19:54:43,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:43,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045488439] [2024-10-23 19:54:43,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:43,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-23 19:54:43,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:43,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045488439] [2024-10-23 19:54:43,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045488439] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:43,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807585906] [2024-10-23 19:54:43,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 19:54:43,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:43,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:43,426 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:43,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-23 19:54:43,539 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-23 19:54:43,540 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:43,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-23 19:54:43,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-23 19:54:43,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-23 19:54:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807585906] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:43,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:43,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-10-23 19:54:43,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889487606] [2024-10-23 19:54:43,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:43,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-23 19:54:43,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:43,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-23 19:54:43,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2024-10-23 19:54:43,787 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:43,916 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2024-10-23 19:54:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-23 19:54:43,916 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-23 19:54:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:43,917 INFO L225 Difference]: With dead ends: 56 [2024-10-23 19:54:43,917 INFO L226 Difference]: Without dead ends: 40 [2024-10-23 19:54:43,917 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2024-10-23 19:54:43,918 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:43,918 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:54:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-23 19:54:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-10-23 19:54:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-10-23 19:54:43,926 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2024-10-23 19:54:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:43,927 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-10-23 19:54:43,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-10-23 19:54:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-23 19:54:43,928 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:43,928 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:43,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-23 19:54:44,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-23 19:54:44,130 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:44,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:44,131 INFO L85 PathProgramCache]: Analyzing trace with hash 167456267, now seen corresponding path program 12 times [2024-10-23 19:54:44,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:44,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146188344] [2024-10-23 19:54:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:44,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:54:46,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:46,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146188344] [2024-10-23 19:54:46,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146188344] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:46,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046867727] [2024-10-23 19:54:46,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 19:54:46,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:46,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:46,907 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:46,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-23 19:54:46,981 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-23 19:54:46,981 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:46,982 WARN L253 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-10-23 19:54:46,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:47,036 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 19 treesize of output 1 [2024-10-23 19:54:48,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-23 19:54:48,493 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 19 treesize of output 16 [2024-10-23 19:54:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-23 19:54:48,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-23 19:54:50,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046867727] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:50,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:50,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 30] total 89 [2024-10-23 19:54:50,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601279951] [2024-10-23 19:54:50,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:50,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-10-23 19:54:50,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-10-23 19:54:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=7486, Unknown=0, NotChecked=0, Total=7832 [2024-10-23 19:54:50,799 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 89 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:54,425 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2024-10-23 19:54:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-23 19:54:54,426 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 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 39 [2024-10-23 19:54:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:54,426 INFO L225 Difference]: With dead ends: 66 [2024-10-23 19:54:54,426 INFO L226 Difference]: Without dead ends: 62 [2024-10-23 19:54:54,429 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2944 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=640, Invalid=13880, Unknown=0, NotChecked=0, Total=14520 [2024-10-23 19:54:54,430 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:54,430 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 179 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-10-23 19:54:54,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-23 19:54:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2024-10-23 19:54:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2024-10-23 19:54:54,443 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 39 [2024-10-23 19:54:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:54,444 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2024-10-23 19:54:54,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2024-10-23 19:54:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-23 19:54:54,444 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:54,444 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:54,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-23 19:54:54,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-23 19:54:54,645 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:54,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:54,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1004601131, now seen corresponding path program 13 times [2024-10-23 19:54:54,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:54,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016651840] [2024-10-23 19:54:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:54,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-23 19:54:54,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:54,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016651840] [2024-10-23 19:54:54,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016651840] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:54,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786096277] [2024-10-23 19:54:54,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 19:54:54,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:54,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:54,868 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:54,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-23 19:54:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:54,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-23 19:54:54,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-23 19:54:55,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-10-23 19:54:55,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786096277] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:55,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:55,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-23 19:54:55,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926123776] [2024-10-23 19:54:55,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:55,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-23 19:54:55,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:55,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-23 19:54:55,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-10-23 19:54:55,217 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:55,344 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2024-10-23 19:54:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-23 19:54:55,344 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 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 40 [2024-10-23 19:54:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:55,345 INFO L225 Difference]: With dead ends: 112 [2024-10-23 19:54:55,345 INFO L226 Difference]: Without dead ends: 58 [2024-10-23 19:54:55,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-10-23 19:54:55,346 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:55,346 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:54:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-23 19:54:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-23 19:54:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 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) [2024-10-23 19:54:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2024-10-23 19:54:55,360 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2024-10-23 19:54:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:55,360 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2024-10-23 19:54:55,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2024-10-23 19:54:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-23 19:54:55,361 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:55,362 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:55,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-23 19:54:55,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-23 19:54:55,566 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:55,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:55,566 INFO L85 PathProgramCache]: Analyzing trace with hash -588574367, now seen corresponding path program 14 times [2024-10-23 19:54:55,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:55,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085965193] [2024-10-23 19:54:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:55,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:54:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-23 19:54:55,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:54:55,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085965193] [2024-10-23 19:54:55,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085965193] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:54:55,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303261690] [2024-10-23 19:54:55,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:54:55,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:55,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:54:55,782 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:54:55,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-23 19:54:55,868 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:54:55,868 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:54:55,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-23 19:54:55,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:54:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-23 19:54:56,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:54:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-23 19:54:56,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303261690] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:54:56,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:54:56,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-10-23 19:54:56,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526152365] [2024-10-23 19:54:56,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:54:56,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-23 19:54:56,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:54:56,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-23 19:54:56,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2024-10-23 19:54:56,105 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:56,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:54:56,239 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2024-10-23 19:54:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-23 19:54:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 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 41 [2024-10-23 19:54:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:54:56,240 INFO L225 Difference]: With dead ends: 80 [2024-10-23 19:54:56,240 INFO L226 Difference]: Without dead ends: 45 [2024-10-23 19:54:56,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2024-10-23 19:54:56,240 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:54:56,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 41 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:54:56,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-23 19:54:56,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-23 19:54:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-10-23 19:54:56,250 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 41 [2024-10-23 19:54:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:54:56,250 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-10-23 19:54:56,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-23 19:54:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-10-23 19:54:56,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-23 19:54:56,251 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:54:56,251 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:54:56,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-23 19:54:56,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:54:56,456 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:54:56,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:54:56,456 INFO L85 PathProgramCache]: Analyzing trace with hash -422298351, now seen corresponding path program 15 times [2024-10-23 19:54:56,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:54:56,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37851323] [2024-10-23 19:54:56,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:54:56,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:54:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:55:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:55:00,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:55:00,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37851323] [2024-10-23 19:55:00,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37851323] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:55:00,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19496474] [2024-10-23 19:55:00,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:55:00,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:55:00,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:55:00,032 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:55:00,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-23 19:55:00,112 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-23 19:55:00,112 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:55:00,120 WARN L253 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-10-23 19:55:00,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:55:02,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 19:55:02,515 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-23 19:55:02,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 33 [2024-10-23 19:55:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 19:55:02,633 INFO L311 TraceCheckSpWp]: Computing backward predicates...