./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-tiling/rewnifrev.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 22:02:57,885 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 22:02:57,940 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 22:02:57,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 22:02:57,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 22:02:57,966 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 22:02:57,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 22:02:57,968 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 22:02:57,969 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 22:02:57,972 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 22:02:57,972 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 22:02:57,972 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 22:02:57,973 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 22:02:57,973 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 22:02:57,973 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 22:02:57,973 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 22:02:57,974 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 22:02:57,974 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 22:02:57,974 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 22:02:57,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 22:02:57,975 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 22:02:57,975 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 22:02:57,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 22:02:57,976 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 22:02:57,976 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 22:02:57,976 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 22:02:57,976 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 22:02:57,977 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 22:02:57,977 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 22:02:57,977 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 22:02:57,977 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 22:02:57,977 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 22:02:57,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:02:57,978 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 22:02:57,978 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 22:02:57,978 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 22:02:57,979 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 22:02:57,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 22:02:57,980 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 22:02:57,980 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 22:02:57,980 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 22:02:57,981 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 22:02:57,981 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed [2024-10-10 22:02:58,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 22:02:58,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 22:02:58,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 22:02:58,207 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 22:02:58,207 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 22:02:58,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev.c [2024-10-10 22:02:59,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 22:02:59,630 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 22:02:59,631 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev.c [2024-10-10 22:02:59,637 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/684e186c8/2ecb7796e87041c385bb5334856abc99/FLAG58969e964 [2024-10-10 22:03:00,025 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/684e186c8/2ecb7796e87041c385bb5334856abc99 [2024-10-10 22:03:00,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 22:03:00,028 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 22:03:00,031 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 22:03:00,031 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 22:03:00,036 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 22:03:00,037 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a80218e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00, skipping insertion in model container [2024-10-10 22:03:00,038 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,053 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 22:03:00,205 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-tiling/rewnifrev.c[400,413] [2024-10-10 22:03:00,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:03:00,232 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 22:03:00,242 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-tiling/rewnifrev.c[400,413] [2024-10-10 22:03:00,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 22:03:00,266 INFO L204 MainTranslator]: Completed translation [2024-10-10 22:03:00,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00 WrapperNode [2024-10-10 22:03:00,267 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 22:03:00,268 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 22:03:00,268 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 22:03:00,268 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 22:03:00,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,280 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,307 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2024-10-10 22:03:00,308 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 22:03:00,308 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 22:03:00,308 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 22:03:00,308 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 22:03:00,318 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,318 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,320 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,330 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-10 22:03:00,331 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,331 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,335 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,338 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,339 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,340 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,342 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 22:03:00,353 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 22:03:00,353 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 22:03:00,353 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 22:03:00,354 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (1/1) ... [2024-10-10 22:03:00,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 22:03:00,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:00,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 22:03:00,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 22:03:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 22:03:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 22:03:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 22:03:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 22:03:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 22:03:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-10 22:03:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 22:03:00,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 22:03:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 22:03:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 22:03:00,497 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 22:03:00,499 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 22:03:00,629 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-10-10 22:03:00,630 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 22:03:00,649 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 22:03:00,649 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-10 22:03:00,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:03:00 BoogieIcfgContainer [2024-10-10 22:03:00,650 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 22:03:00,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 22:03:00,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 22:03:00,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 22:03:00,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 10:03:00" (1/3) ... [2024-10-10 22:03:00,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225adea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:03:00, skipping insertion in model container [2024-10-10 22:03:00,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 10:03:00" (2/3) ... [2024-10-10 22:03:00,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@225adea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 10:03:00, skipping insertion in model container [2024-10-10 22:03:00,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 10:03:00" (3/3) ... [2024-10-10 22:03:00,657 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnifrev.c [2024-10-10 22:03:00,671 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 22:03:00,671 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 22:03:00,719 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 22:03:00,724 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;@fb61e5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 22:03:00,725 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 22:03:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 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) [2024-10-10 22:03:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-10 22:03:00,734 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:00,734 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:00,735 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:00,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1562928649, now seen corresponding path program 1 times [2024-10-10 22:03:00,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:00,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783928634] [2024-10-10 22:03:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:00,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:00,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783928634] [2024-10-10 22:03:00,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783928634] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:03:00,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:03:00,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-10 22:03:00,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923718809] [2024-10-10 22:03:00,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:03:00,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 22:03:00,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:00,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 22:03:00,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-10 22:03:00,908 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-10-10 22:03:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:00,926 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2024-10-10 22:03:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 22:03:00,929 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2024-10-10 22:03:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:00,934 INFO L225 Difference]: With dead ends: 23 [2024-10-10 22:03:00,934 INFO L226 Difference]: Without dead ends: 11 [2024-10-10 22:03:00,937 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 [2024-10-10 22:03:00,939 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:00,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:03:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-10-10 22:03:00,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-10-10 22:03:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2024-10-10 22:03:00,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2024-10-10 22:03:00,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2024-10-10 22:03:00,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:00,965 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2024-10-10 22:03:00,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2024-10-10 22:03:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2024-10-10 22:03:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-10 22:03:00,966 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:00,966 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:00,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-10 22:03:00,966 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:00,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:00,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1574934422, now seen corresponding path program 1 times [2024-10-10 22:03:00,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:00,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198412635] [2024-10-10 22:03:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:00,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:01,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:01,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198412635] [2024-10-10 22:03:01,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198412635] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:03:01,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:03:01,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-10 22:03:01,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127981173] [2024-10-10 22:03:01,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:03:01,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 22:03:01,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:01,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 22:03:01,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-10 22:03:01,095 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-10-10 22:03:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:01,128 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-10-10 22:03:01,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 22:03:01,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2024-10-10 22:03:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:01,129 INFO L225 Difference]: With dead ends: 23 [2024-10-10 22:03:01,129 INFO L226 Difference]: Without dead ends: 14 [2024-10-10 22:03:01,130 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 [2024-10-10 22:03:01,132 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:01,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:03:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-10 22:03:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2024-10-10 22:03:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2024-10-10 22:03:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-10-10 22:03:01,138 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2024-10-10 22:03:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:01,139 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-10-10 22:03:01,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2024-10-10 22:03:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-10-10 22:03:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-10 22:03:01,139 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:01,140 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:01,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-10 22:03:01,140 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:01,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:01,141 INFO L85 PathProgramCache]: Analyzing trace with hash -994451034, now seen corresponding path program 1 times [2024-10-10 22:03:01,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:01,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762269780] [2024-10-10 22:03:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:01,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:01,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:01,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762269780] [2024-10-10 22:03:01,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762269780] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:03:01,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:03:01,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-10 22:03:01,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127191489] [2024-10-10 22:03:01,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:03:01,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-10 22:03:01,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:01,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-10 22:03:01,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-10 22:03:01,219 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-10-10 22:03:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:01,264 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-10-10 22:03:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-10 22:03:01,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2024-10-10 22:03:01,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:01,265 INFO L225 Difference]: With dead ends: 26 [2024-10-10 22:03:01,265 INFO L226 Difference]: Without dead ends: 20 [2024-10-10 22:03:01,266 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 [2024-10-10 22:03:01,267 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:01,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:03:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-10 22:03:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2024-10-10 22:03:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-10-10 22:03:01,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2024-10-10 22:03:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:01,275 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-10-10 22:03:01,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2024-10-10 22:03:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-10-10 22:03:01,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-10 22:03:01,277 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:01,277 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:01,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-10 22:03:01,277 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:01,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:01,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1872132756, now seen corresponding path program 1 times [2024-10-10 22:03:01,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:01,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932673601] [2024-10-10 22:03:01,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:01,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-10 22:03:01,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:01,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932673601] [2024-10-10 22:03:01,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932673601] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 22:03:01,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-10 22:03:01,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-10 22:03:01,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038100590] [2024-10-10 22:03:01,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 22:03:01,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-10 22:03:01,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:01,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-10 22:03:01,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-10 22:03:01,653 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2024-10-10 22:03:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:01,712 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-10-10 22:03:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-10 22:03:01,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-10 22:03:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:01,713 INFO L225 Difference]: With dead ends: 22 [2024-10-10 22:03:01,713 INFO L226 Difference]: Without dead ends: 20 [2024-10-10 22:03:01,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-10-10 22:03:01,715 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:01,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 14 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 22:03:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-10 22:03:01,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2024-10-10 22:03:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2024-10-10 22:03:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-10-10 22:03:01,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2024-10-10 22:03:01,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:01,719 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-10-10 22:03:01,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2024-10-10 22:03:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-10-10 22:03:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-10 22:03:01,719 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:01,720 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:01,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-10 22:03:01,720 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:01,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1743708518, now seen corresponding path program 1 times [2024-10-10 22:03:01,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:01,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216739063] [2024-10-10 22:03:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:01,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:02,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:02,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216739063] [2024-10-10 22:03:02,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216739063] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:02,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990795482] [2024-10-10 22:03:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:02,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:02,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:02,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 22:03:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:02,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-10 22:03:02,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:02,119 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 18 treesize of output 14 [2024-10-10 22:03:02,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-10-10 22:03:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:02,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:02,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990795482] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:02,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:02,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-10-10 22:03:02,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522960831] [2024-10-10 22:03:02,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:02,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-10 22:03:02,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:02,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-10 22:03:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2024-10-10 22:03:02,437 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 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) [2024-10-10 22:03:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:02,640 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2024-10-10 22:03:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-10 22:03:02,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-10 22:03:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:02,641 INFO L225 Difference]: With dead ends: 27 [2024-10-10 22:03:02,641 INFO L226 Difference]: Without dead ends: 25 [2024-10-10 22:03:02,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2024-10-10 22:03:02,642 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:02,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 20 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-10 22:03:02,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2024-10-10 22:03:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2024-10-10 22:03:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-10-10 22:03:02,650 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2024-10-10 22:03:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:02,650 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-10-10 22:03:02,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 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) [2024-10-10 22:03:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-10-10 22:03:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-10 22:03:02,651 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:02,651 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:02,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 22:03:02,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:02,855 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:02,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:02,855 INFO L85 PathProgramCache]: Analyzing trace with hash -803648724, now seen corresponding path program 2 times [2024-10-10 22:03:02,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:02,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368751306] [2024-10-10 22:03:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:02,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:02,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:02,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368751306] [2024-10-10 22:03:02,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368751306] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:02,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779667230] [2024-10-10 22:03:02,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:03:02,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:02,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:02,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:02,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 22:03:02,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:03:02,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:02,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-10 22:03:02,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:03,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:03,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779667230] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:03,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:03,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2024-10-10 22:03:03,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858380288] [2024-10-10 22:03:03,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:03,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-10 22:03:03,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:03,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-10 22:03:03,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2024-10-10 22:03:03,114 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:03,185 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2024-10-10 22:03:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-10 22:03:03,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-10 22:03:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:03,187 INFO L225 Difference]: With dead ends: 43 [2024-10-10 22:03:03,188 INFO L226 Difference]: Without dead ends: 24 [2024-10-10 22:03:03,188 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2024-10-10 22:03:03,189 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:03,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 22 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:03,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-10 22:03:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-10-10 22:03:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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) [2024-10-10 22:03:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-10-10 22:03:03,196 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2024-10-10 22:03:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:03,196 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-10-10 22:03:03,196 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-10-10 22:03:03,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-10 22:03:03,197 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:03,197 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:03,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:03,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:03,398 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:03,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1443181976, now seen corresponding path program 3 times [2024-10-10 22:03:03,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:03,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900646624] [2024-10-10 22:03:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:03,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900646624] [2024-10-10 22:03:03,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900646624] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985245642] [2024-10-10 22:03:03,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:03:03,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:03,757 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:03,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 22:03:03,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-10 22:03:03,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:03,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-10 22:03:03,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:03,845 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 17 treesize of output 13 [2024-10-10 22:03:03,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-10-10 22:03:03,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2024-10-10 22:03:03,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:03,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-10 22:03:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:04,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:04,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985245642] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:04,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:04,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 30 [2024-10-10 22:03:04,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95636683] [2024-10-10 22:03:04,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:04,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-10 22:03:04,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-10 22:03:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2024-10-10 22:03:04,537 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 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) [2024-10-10 22:03:05,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:05,107 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2024-10-10 22:03:05,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-10 22:03:05,108 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 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 22 [2024-10-10 22:03:05,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:05,108 INFO L225 Difference]: With dead ends: 52 [2024-10-10 22:03:05,108 INFO L226 Difference]: Without dead ends: 37 [2024-10-10 22:03:05,109 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=594, Invalid=1758, Unknown=0, NotChecked=0, Total=2352 [2024-10-10 22:03:05,110 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 53 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:05,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 32 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:03:05,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-10 22:03:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2024-10-10 22:03:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-10-10 22:03:05,117 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2024-10-10 22:03:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:05,117 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-10-10 22:03:05,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 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) [2024-10-10 22:03:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-10-10 22:03:05,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-10 22:03:05,118 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:05,118 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:05,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:05,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:05,323 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:05,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash -2104111834, now seen corresponding path program 4 times [2024-10-10 22:03:05,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:05,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978354557] [2024-10-10 22:03:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:05,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:05,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:05,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978354557] [2024-10-10 22:03:05,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978354557] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:05,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70569734] [2024-10-10 22:03:05,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:03:05,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:05,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:05,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:05,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 22:03:05,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:03:05,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:05,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-10 22:03:05,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:05,856 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 18 treesize of output 14 [2024-10-10 22:03:05,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2024-10-10 22:03:05,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2024-10-10 22:03:05,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:05,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 54 treesize of output 35 [2024-10-10 22:03:05,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:05,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 49 [2024-10-10 22:03:05,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:05,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 44 [2024-10-10 22:03:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:06,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:06,463 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70569734] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:06,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2024-10-10 22:03:06,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270811621] [2024-10-10 22:03:06,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:06,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-10 22:03:06,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:06,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-10 22:03:06,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2024-10-10 22:03:06,465 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 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) [2024-10-10 22:03:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:07,040 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2024-10-10 22:03:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-10 22:03:07,041 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 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 28 [2024-10-10 22:03:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:07,042 INFO L225 Difference]: With dead ends: 45 [2024-10-10 22:03:07,042 INFO L226 Difference]: Without dead ends: 43 [2024-10-10 22:03:07,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=706, Invalid=2156, Unknown=0, NotChecked=0, Total=2862 [2024-10-10 22:03:07,044 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:07,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 29 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:03:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-10 22:03:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2024-10-10 22:03:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2024-10-10 22:03:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-10-10 22:03:07,049 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2024-10-10 22:03:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:07,050 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-10-10 22:03:07,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 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) [2024-10-10 22:03:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-10-10 22:03:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-10 22:03:07,051 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:07,051 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:07,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 22:03:07,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-10 22:03:07,255 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:07,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:07,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1457375084, now seen corresponding path program 5 times [2024-10-10 22:03:07,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:07,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167459632] [2024-10-10 22:03:07,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:07,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:07,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:07,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167459632] [2024-10-10 22:03:07,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167459632] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:07,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047063766] [2024-10-10 22:03:07,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:03:07,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:07,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:07,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:07,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 22:03:07,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-10 22:03:07,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:07,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-10 22:03:07,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:07,491 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:07,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047063766] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:07,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:07,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 18 [2024-10-10 22:03:07,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898200449] [2024-10-10 22:03:07,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:07,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-10 22:03:07,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:07,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-10 22:03:07,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2024-10-10 22:03:07,583 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 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) [2024-10-10 22:03:07,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:07,667 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2024-10-10 22:03:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-10 22:03:07,667 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 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 [2024-10-10 22:03:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:07,668 INFO L225 Difference]: With dead ends: 66 [2024-10-10 22:03:07,668 INFO L226 Difference]: Without dead ends: 36 [2024-10-10 22:03:07,668 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2024-10-10 22:03:07,669 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:07,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-10 22:03:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-10-10 22:03:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2024-10-10 22:03:07,675 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2024-10-10 22:03:07,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:07,676 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2024-10-10 22:03:07,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 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) [2024-10-10 22:03:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2024-10-10 22:03:07,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-10 22:03:07,677 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:07,678 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:07,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-10 22:03:07,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:07,882 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:07,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1311657128, now seen corresponding path program 6 times [2024-10-10 22:03:07,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:07,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463024852] [2024-10-10 22:03:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:07,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:08,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:08,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463024852] [2024-10-10 22:03:08,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463024852] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:08,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142415950] [2024-10-10 22:03:08,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:03:08,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:08,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:08,341 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:08,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 22:03:08,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-10-10 22:03:08,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:08,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-10 22:03:08,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:08,442 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 17 treesize of output 13 [2024-10-10 22:03:08,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-10-10 22:03:08,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2024-10-10 22:03:08,507 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:08,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 33 [2024-10-10 22:03:08,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:08,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 44 treesize of output 46 [2024-10-10 22:03:08,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:08,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 63 treesize of output 49 [2024-10-10 22:03:08,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:08,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 62 [2024-10-10 22:03:08,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:08,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-10-10 22:03:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:09,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:09,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142415950] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:09,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:09,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 16] total 33 [2024-10-10 22:03:09,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572832693] [2024-10-10 22:03:09,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:09,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-10 22:03:09,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-10 22:03:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2024-10-10 22:03:09,317 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 33 states, 33 states have (on average 2.484848484848485) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:09,724 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2024-10-10 22:03:09,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-10 22:03:09,724 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.484848484848485) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-10-10 22:03:09,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:09,725 INFO L225 Difference]: With dead ends: 44 [2024-10-10 22:03:09,725 INFO L226 Difference]: Without dead ends: 42 [2024-10-10 22:03:09,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=531, Invalid=1449, Unknown=0, NotChecked=0, Total=1980 [2024-10-10 22:03:09,726 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:09,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 23 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:03:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-10 22:03:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2024-10-10 22:03:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2024-10-10 22:03:09,734 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2024-10-10 22:03:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:09,734 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2024-10-10 22:03:09,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.484848484848485) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2024-10-10 22:03:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-10 22:03:09,735 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:09,735 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:09,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:09,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-10 22:03:09,936 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:09,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:09,937 INFO L85 PathProgramCache]: Analyzing trace with hash -29622102, now seen corresponding path program 7 times [2024-10-10 22:03:09,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:09,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63179527] [2024-10-10 22:03:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:09,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:10,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:10,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63179527] [2024-10-10 22:03:10,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63179527] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:10,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011229995] [2024-10-10 22:03:10,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:03:10,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:10,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:10,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:10,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 22:03:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:10,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-10 22:03:10,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 40 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:10,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 49 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:10,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011229995] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:10,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:10,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 21 [2024-10-10 22:03:10,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896894645] [2024-10-10 22:03:10,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:10,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-10 22:03:10,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:10,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-10 22:03:10,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2024-10-10 22:03:10,324 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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) [2024-10-10 22:03:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:10,399 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2024-10-10 22:03:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-10 22:03:10,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-10-10 22:03:10,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:10,400 INFO L225 Difference]: With dead ends: 70 [2024-10-10 22:03:10,400 INFO L226 Difference]: Without dead ends: 42 [2024-10-10 22:03:10,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2024-10-10 22:03:10,401 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:10,401 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-10 22:03:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-10-10 22:03:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 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) [2024-10-10 22:03:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2024-10-10 22:03:10,407 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2024-10-10 22:03:10,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:10,408 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2024-10-10 22:03:10,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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) [2024-10-10 22:03:10,408 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2024-10-10 22:03:10,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-10 22:03:10,408 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:10,409 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:10,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 22:03:10,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:10,612 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:10,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:10,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1011525862, now seen corresponding path program 8 times [2024-10-10 22:03:10,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:10,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109802030] [2024-10-10 22:03:10,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:10,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:11,203 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:11,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109802030] [2024-10-10 22:03:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109802030] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242371577] [2024-10-10 22:03:11,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:03:11,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:11,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:11,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:11,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 22:03:11,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:03:11,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:11,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-10-10 22:03:11,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:11,286 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 18 treesize of output 14 [2024-10-10 22:03:11,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2024-10-10 22:03:11,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2024-10-10 22:03:11,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:11,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 54 treesize of output 35 [2024-10-10 22:03:11,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:11,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 49 [2024-10-10 22:03:11,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:11,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 68 treesize of output 52 [2024-10-10 22:03:11,393 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:11,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 61 treesize of output 66 [2024-10-10 22:03:11,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:11,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 69 [2024-10-10 22:03:11,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:11,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 83 [2024-10-10 22:03:11,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:11,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-10-10 22:03:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 46 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:12,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 25 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:12,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242371577] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:12,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:12,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 34 [2024-10-10 22:03:12,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093879159] [2024-10-10 22:03:12,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:12,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-10 22:03:12,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:12,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-10 22:03:12,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=840, Unknown=0, NotChecked=0, Total=1122 [2024-10-10 22:03:12,221 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 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) [2024-10-10 22:03:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:12,758 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2024-10-10 22:03:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-10 22:03:12,758 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 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 [2024-10-10 22:03:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:12,759 INFO L225 Difference]: With dead ends: 50 [2024-10-10 22:03:12,759 INFO L226 Difference]: Without dead ends: 48 [2024-10-10 22:03:12,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1651, Unknown=0, NotChecked=0, Total=2256 [2024-10-10 22:03:12,760 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:12,760 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 24 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-10 22:03:12,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-10 22:03:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2024-10-10 22:03:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 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) [2024-10-10 22:03:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2024-10-10 22:03:12,768 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 40 [2024-10-10 22:03:12,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:12,769 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2024-10-10 22:03:12,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.7941176470588234) internal successors, (95), 34 states have internal predecessors, (95), 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) [2024-10-10 22:03:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2024-10-10 22:03:12,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-10 22:03:12,770 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:12,770 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:12,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-10 22:03:12,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-10 22:03:12,974 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:12,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:12,974 INFO L85 PathProgramCache]: Analyzing trace with hash 881742764, now seen corresponding path program 9 times [2024-10-10 22:03:12,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:12,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675616651] [2024-10-10 22:03:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:12,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:13,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:13,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675616651] [2024-10-10 22:03:13,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675616651] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:13,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020981733] [2024-10-10 22:03:13,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:03:13,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:13,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:13,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:13,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 22:03:13,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-10 22:03:13,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:13,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-10 22:03:13,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:13,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 68 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:13,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020981733] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:13,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:13,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 24 [2024-10-10 22:03:13,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814742116] [2024-10-10 22:03:13,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:13,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-10 22:03:13,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:13,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-10 22:03:13,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2024-10-10 22:03:13,497 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:13,597 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2024-10-10 22:03:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-10 22:03:13,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-10-10 22:03:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:13,599 INFO L225 Difference]: With dead ends: 79 [2024-10-10 22:03:13,599 INFO L226 Difference]: Without dead ends: 48 [2024-10-10 22:03:13,599 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2024-10-10 22:03:13,601 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:13,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:13,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-10-10 22:03:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2024-10-10 22:03:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 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) [2024-10-10 22:03:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2024-10-10 22:03:13,611 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2024-10-10 22:03:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:13,612 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2024-10-10 22:03:13,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2024-10-10 22:03:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-10 22:03:13,613 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:13,613 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:13,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:13,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:13,814 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:13,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:13,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1393238296, now seen corresponding path program 10 times [2024-10-10 22:03:13,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:13,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613117124] [2024-10-10 22:03:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:13,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:14,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:14,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613117124] [2024-10-10 22:03:14,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613117124] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:14,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343636775] [2024-10-10 22:03:14,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:03:14,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:14,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:14,520 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:14,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 22:03:14,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:03:14,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:14,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-10-10 22:03:14,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:14,601 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 18 treesize of output 14 [2024-10-10 22:03:14,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2024-10-10 22:03:14,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2024-10-10 22:03:14,658 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:14,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 54 treesize of output 35 [2024-10-10 22:03:14,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:14,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 49 [2024-10-10 22:03:14,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:14,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 68 treesize of output 52 [2024-10-10 22:03:14,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:14,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 61 treesize of output 66 [2024-10-10 22:03:14,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:14,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 69 [2024-10-10 22:03:14,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:14,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 83 [2024-10-10 22:03:14,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:14,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 86 [2024-10-10 22:03:14,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:14,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 100 [2024-10-10 22:03:15,034 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:15,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 66 treesize of output 80 [2024-10-10 22:03:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 64 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:15,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 30 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:15,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343636775] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:15,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:15,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 38 [2024-10-10 22:03:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777870410] [2024-10-10 22:03:15,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:15,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-10 22:03:15,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-10 22:03:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2024-10-10 22:03:15,820 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 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) [2024-10-10 22:03:16,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:16,450 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2024-10-10 22:03:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-10 22:03:16,450 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 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 46 [2024-10-10 22:03:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:16,451 INFO L225 Difference]: With dead ends: 56 [2024-10-10 22:03:16,451 INFO L226 Difference]: Without dead ends: 54 [2024-10-10 22:03:16,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 68 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=745, Invalid=2117, Unknown=0, NotChecked=0, Total=2862 [2024-10-10 22:03:16,452 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:16,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 26 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:03:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-10 22:03:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-10-10 22:03:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 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) [2024-10-10 22:03:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2024-10-10 22:03:16,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2024-10-10 22:03:16,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:16,459 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2024-10-10 22:03:16,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 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) [2024-10-10 22:03:16,459 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2024-10-10 22:03:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-10 22:03:16,460 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:16,460 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:16,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:16,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-10 22:03:16,661 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:16,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:16,661 INFO L85 PathProgramCache]: Analyzing trace with hash 607209066, now seen corresponding path program 11 times [2024-10-10 22:03:16,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:16,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573688021] [2024-10-10 22:03:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:16,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 58 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:16,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:16,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573688021] [2024-10-10 22:03:16,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573688021] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:16,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595776933] [2024-10-10 22:03:16,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:03:16,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:16,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:16,823 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:16,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 22:03:16,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-10-10 22:03:16,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:16,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-10 22:03:16,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:17,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 90 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:17,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595776933] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:17,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:17,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 27 [2024-10-10 22:03:17,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486024686] [2024-10-10 22:03:17,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:17,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-10 22:03:17,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-10 22:03:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2024-10-10 22:03:17,273 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 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) [2024-10-10 22:03:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:17,390 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2024-10-10 22:03:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-10 22:03:17,390 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-10-10 22:03:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:17,391 INFO L225 Difference]: With dead ends: 88 [2024-10-10 22:03:17,391 INFO L226 Difference]: Without dead ends: 54 [2024-10-10 22:03:17,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2024-10-10 22:03:17,392 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:17,392 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 63 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:17,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-10 22:03:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-10-10 22:03:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 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) [2024-10-10 22:03:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2024-10-10 22:03:17,398 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2024-10-10 22:03:17,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:17,398 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2024-10-10 22:03:17,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 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) [2024-10-10 22:03:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2024-10-10 22:03:17,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-10 22:03:17,399 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:17,399 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:17,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:17,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-10 22:03:17,600 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:17,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:17,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1606847322, now seen corresponding path program 12 times [2024-10-10 22:03:17,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:17,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187324225] [2024-10-10 22:03:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:17,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:18,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:18,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187324225] [2024-10-10 22:03:18,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187324225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:18,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788774081] [2024-10-10 22:03:18,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:03:18,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:18,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:18,382 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:18,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 22:03:18,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-10 22:03:18,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:18,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-10-10 22:03:18,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:18,636 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 17 treesize of output 13 [2024-10-10 22:03:18,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-10-10 22:03:18,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2024-10-10 22:03:18,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:18,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 33 [2024-10-10 22:03:18,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:18,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 44 treesize of output 46 [2024-10-10 22:03:18,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:18,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 63 treesize of output 49 [2024-10-10 22:03:18,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:18,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 62 [2024-10-10 22:03:18,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:18,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 65 [2024-10-10 22:03:18,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:18,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 78 [2024-10-10 22:03:18,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:18,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 81 [2024-10-10 22:03:18,890 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:18,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 94 [2024-10-10 22:03:18,952 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:18,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 102 treesize of output 97 [2024-10-10 22:03:18,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:18,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 96 treesize of output 110 [2024-10-10 22:03:19,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:19,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2024-10-10 22:03:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 85 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:19,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 35 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:20,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788774081] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:20,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:20,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 22] total 46 [2024-10-10 22:03:20,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73656531] [2024-10-10 22:03:20,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:20,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-10 22:03:20,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:20,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-10 22:03:20,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2024-10-10 22:03:20,206 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 46 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 46 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:20,956 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2024-10-10 22:03:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-10 22:03:20,957 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 46 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-10-10 22:03:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:20,957 INFO L225 Difference]: With dead ends: 62 [2024-10-10 22:03:20,957 INFO L226 Difference]: Without dead ends: 60 [2024-10-10 22:03:20,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1070, Invalid=3090, Unknown=0, NotChecked=0, Total=4160 [2024-10-10 22:03:20,959 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:20,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 30 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-10 22:03:20,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-10 22:03:20,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2024-10-10 22:03:20,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 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) [2024-10-10 22:03:20,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2024-10-10 22:03:20,968 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2024-10-10 22:03:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:20,968 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2024-10-10 22:03:20,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 46 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2024-10-10 22:03:20,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-10 22:03:20,970 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:20,970 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:20,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-10 22:03:21,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-10 22:03:21,170 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:21,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:21,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2122248172, now seen corresponding path program 13 times [2024-10-10 22:03:21,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:21,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138637386] [2024-10-10 22:03:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:21,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 78 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:21,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:21,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138637386] [2024-10-10 22:03:21,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138637386] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:21,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872632153] [2024-10-10 22:03:21,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:03:21,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:21,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:21,316 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:21,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-10 22:03:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:21,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-10 22:03:21,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:21,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 115 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:21,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872632153] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:21,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:21,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 30 [2024-10-10 22:03:21,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286446849] [2024-10-10 22:03:21,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:21,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-10 22:03:21,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:21,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-10 22:03:21,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=524, Unknown=0, NotChecked=0, Total=870 [2024-10-10 22:03:21,775 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 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) [2024-10-10 22:03:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:21,875 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2024-10-10 22:03:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-10 22:03:21,876 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-10-10 22:03:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:21,876 INFO L225 Difference]: With dead ends: 97 [2024-10-10 22:03:21,876 INFO L226 Difference]: Without dead ends: 60 [2024-10-10 22:03:21,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=368, Invalid=562, Unknown=0, NotChecked=0, Total=930 [2024-10-10 22:03:21,877 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:21,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 74 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-10 22:03:21,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-10-10 22:03:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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) [2024-10-10 22:03:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2024-10-10 22:03:21,885 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2024-10-10 22:03:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:21,885 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2024-10-10 22:03:21,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6333333333333333) internal successors, (109), 30 states have internal predecessors, (109), 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) [2024-10-10 22:03:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2024-10-10 22:03:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-10-10 22:03:21,886 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:21,886 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:21,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-10 22:03:22,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-10 22:03:22,086 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:22,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:22,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1725791960, now seen corresponding path program 14 times [2024-10-10 22:03:22,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:22,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620712453] [2024-10-10 22:03:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:22,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 32 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:23,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:23,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620712453] [2024-10-10 22:03:23,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620712453] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:23,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994361196] [2024-10-10 22:03:23,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:03:23,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:23,183 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:23,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-10 22:03:23,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:03:23,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:23,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-10 22:03:23,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:23,284 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 18 treesize of output 14 [2024-10-10 22:03:23,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2024-10-10 22:03:23,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2024-10-10 22:03:23,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 54 treesize of output 35 [2024-10-10 22:03:23,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 49 [2024-10-10 22:03:23,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 68 treesize of output 52 [2024-10-10 22:03:23,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 61 treesize of output 66 [2024-10-10 22:03:23,414 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 69 [2024-10-10 22:03:23,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 83 [2024-10-10 22:03:23,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 86 [2024-10-10 22:03:23,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 100 [2024-10-10 22:03:23,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 110 treesize of output 103 [2024-10-10 22:03:23,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 103 treesize of output 117 [2024-10-10 22:03:23,649 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 124 treesize of output 120 [2024-10-10 22:03:23,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 117 treesize of output 134 [2024-10-10 22:03:23,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:23,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-10-10 22:03:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 109 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:24,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 40 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:25,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994361196] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:25,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:25,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 61 [2024-10-10 22:03:25,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606892473] [2024-10-10 22:03:25,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:25,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-10 22:03:25,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:25,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-10 22:03:25,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=3067, Unknown=0, NotChecked=0, Total=3660 [2024-10-10 22:03:25,229 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 61 states, 61 states have (on average 2.721311475409836) internal successors, (166), 61 states have internal predecessors, (166), 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) [2024-10-10 22:03:27,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:27,116 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2024-10-10 22:03:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-10 22:03:27,116 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.721311475409836) internal successors, (166), 61 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-10-10 22:03:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:27,117 INFO L225 Difference]: With dead ends: 68 [2024-10-10 22:03:27,117 INFO L226 Difference]: Without dead ends: 66 [2024-10-10 22:03:27,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2179, Invalid=7721, Unknown=0, NotChecked=0, Total=9900 [2024-10-10 22:03:27,119 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 153 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:27,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 39 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-10 22:03:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-10 22:03:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-10-10 22:03:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 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) [2024-10-10 22:03:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2024-10-10 22:03:27,127 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 58 [2024-10-10 22:03:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:27,127 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2024-10-10 22:03:27,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.721311475409836) internal successors, (166), 61 states have internal predecessors, (166), 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) [2024-10-10 22:03:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2024-10-10 22:03:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-10 22:03:27,128 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:27,128 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:27,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-10 22:03:27,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-10 22:03:27,329 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:27,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:27,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1990556714, now seen corresponding path program 15 times [2024-10-10 22:03:27,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:27,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567323337] [2024-10-10 22:03:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:27,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 101 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:27,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:27,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567323337] [2024-10-10 22:03:27,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567323337] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:27,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928894366] [2024-10-10 22:03:27,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:03:27,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:27,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:27,522 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:27,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-10 22:03:27,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-10-10 22:03:27,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:27,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-10 22:03:27,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 126 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:27,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 143 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:28,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928894366] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:28,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:28,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 22] total 33 [2024-10-10 22:03:28,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406608347] [2024-10-10 22:03:28,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:28,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-10 22:03:28,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-10 22:03:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2024-10-10 22:03:28,100 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 33 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 33 states have internal predecessors, (121), 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) [2024-10-10 22:03:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:28,201 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2024-10-10 22:03:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-10 22:03:28,201 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 33 states have internal predecessors, (121), 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 61 [2024-10-10 22:03:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:28,202 INFO L225 Difference]: With dead ends: 106 [2024-10-10 22:03:28,202 INFO L226 Difference]: Without dead ends: 66 [2024-10-10 22:03:28,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=679, Unknown=0, NotChecked=0, Total=1122 [2024-10-10 22:03:28,202 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:28,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 64 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-10 22:03:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-10-10 22:03:28,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2024-10-10 22:03:28,210 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2024-10-10 22:03:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:28,211 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2024-10-10 22:03:28,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 33 states have internal predecessors, (121), 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) [2024-10-10 22:03:28,211 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2024-10-10 22:03:28,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-10 22:03:28,211 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:28,211 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:28,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-10 22:03:28,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:28,412 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:28,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1735511962, now seen corresponding path program 16 times [2024-10-10 22:03:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:28,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113396626] [2024-10-10 22:03:28,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:28,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 28 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:29,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:29,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113396626] [2024-10-10 22:03:29,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113396626] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:29,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755894537] [2024-10-10 22:03:29,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:03:29,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:29,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:29,337 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:29,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-10 22:03:29,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:03:29,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:29,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-10-10 22:03:29,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:29,462 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 18 treesize of output 14 [2024-10-10 22:03:29,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2024-10-10 22:03:29,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2024-10-10 22:03:29,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 54 treesize of output 35 [2024-10-10 22:03:29,510 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 49 [2024-10-10 22:03:29,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 68 treesize of output 52 [2024-10-10 22:03:29,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 61 treesize of output 66 [2024-10-10 22:03:29,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 69 [2024-10-10 22:03:29,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 83 [2024-10-10 22:03:29,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 86 [2024-10-10 22:03:29,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 100 [2024-10-10 22:03:29,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 110 treesize of output 103 [2024-10-10 22:03:29,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 103 treesize of output 117 [2024-10-10 22:03:29,807 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 124 treesize of output 120 [2024-10-10 22:03:29,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 117 treesize of output 134 [2024-10-10 22:03:29,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 138 treesize of output 137 [2024-10-10 22:03:29,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:29,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 131 treesize of output 151 [2024-10-10 22:03:30,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:30,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-10-10 22:03:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 136 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:31,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 45 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:31,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755894537] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:31,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:31,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 25] total 51 [2024-10-10 22:03:31,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134906591] [2024-10-10 22:03:31,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:31,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-10 22:03:31,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-10 22:03:31,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2024-10-10 22:03:31,576 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 51 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 51 states have internal predecessors, (155), 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) [2024-10-10 22:03:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:32,760 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2024-10-10 22:03:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-10 22:03:32,760 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 51 states have internal predecessors, (155), 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 64 [2024-10-10 22:03:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:32,761 INFO L225 Difference]: With dead ends: 74 [2024-10-10 22:03:32,761 INFO L226 Difference]: Without dead ends: 72 [2024-10-10 22:03:32,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 97 SyntacticMatches, 13 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1338, Invalid=3918, Unknown=0, NotChecked=0, Total=5256 [2024-10-10 22:03:32,762 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 57 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:32,762 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 43 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-10 22:03:32,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-10 22:03:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2024-10-10 22:03:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 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) [2024-10-10 22:03:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2024-10-10 22:03:32,773 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2024-10-10 22:03:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:32,773 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2024-10-10 22:03:32,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0392156862745097) internal successors, (155), 51 states have internal predecessors, (155), 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) [2024-10-10 22:03:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2024-10-10 22:03:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-10 22:03:32,773 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:32,774 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:32,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:32,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:32,974 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:32,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash 184785964, now seen corresponding path program 17 times [2024-10-10 22:03:32,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:32,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557057659] [2024-10-10 22:03:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:32,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 127 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:33,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:33,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557057659] [2024-10-10 22:03:33,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557057659] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:33,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072949421] [2024-10-10 22:03:33,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:03:33,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:33,167 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:33,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-10 22:03:33,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-10-10 22:03:33,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:33,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-10 22:03:33,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:33,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 174 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:33,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072949421] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:33,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:33,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 24] total 36 [2024-10-10 22:03:33,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599814015] [2024-10-10 22:03:33,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:33,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-10 22:03:33,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-10 22:03:33,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=761, Unknown=0, NotChecked=0, Total=1260 [2024-10-10 22:03:33,787 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 36 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 36 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:33,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:33,893 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2024-10-10 22:03:33,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-10 22:03:33,893 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 36 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-10-10 22:03:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:33,894 INFO L225 Difference]: With dead ends: 115 [2024-10-10 22:03:33,894 INFO L226 Difference]: Without dead ends: 72 [2024-10-10 22:03:33,894 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 111 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=525, Invalid=807, Unknown=0, NotChecked=0, Total=1332 [2024-10-10 22:03:33,895 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:33,895 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 68 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:33,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-10 22:03:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-10-10 22:03:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 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) [2024-10-10 22:03:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2024-10-10 22:03:33,904 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2024-10-10 22:03:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:33,905 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2024-10-10 22:03:33,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 36 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2024-10-10 22:03:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-10-10 22:03:33,905 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:33,905 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:33,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:34,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:34,106 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:34,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:34,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1720398696, now seen corresponding path program 18 times [2024-10-10 22:03:34,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:34,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757375076] [2024-10-10 22:03:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:34,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 31 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:35,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:35,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757375076] [2024-10-10 22:03:35,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757375076] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:35,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158578548] [2024-10-10 22:03:35,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:03:35,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:35,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:35,288 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:35,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-10 22:03:36,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-10-10 22:03:36,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:36,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-10-10 22:03:36,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:36,125 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 17 treesize of output 13 [2024-10-10 22:03:36,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-10-10 22:03:36,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2024-10-10 22:03:36,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 33 [2024-10-10 22:03:36,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 44 treesize of output 46 [2024-10-10 22:03:36,224 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 63 treesize of output 49 [2024-10-10 22:03:36,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 62 [2024-10-10 22:03:36,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 65 [2024-10-10 22:03:36,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 78 [2024-10-10 22:03:36,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 81 [2024-10-10 22:03:36,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 94 [2024-10-10 22:03:36,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 102 treesize of output 97 [2024-10-10 22:03:36,487 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 96 treesize of output 110 [2024-10-10 22:03:36,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 115 treesize of output 113 [2024-10-10 22:03:36,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 109 treesize of output 126 [2024-10-10 22:03:36,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 128 treesize of output 129 [2024-10-10 22:03:36,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 122 treesize of output 142 [2024-10-10 22:03:36,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 141 treesize of output 145 [2024-10-10 22:03:36,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:36,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 135 treesize of output 158 [2024-10-10 22:03:37,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:37,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 82 treesize of output 108 [2024-10-10 22:03:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 166 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:38,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:38,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158578548] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:38,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:38,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29, 28] total 58 [2024-10-10 22:03:38,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430668918] [2024-10-10 22:03:38,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:38,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-10 22:03:38,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:38,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-10 22:03:38,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=2533, Unknown=0, NotChecked=0, Total=3306 [2024-10-10 22:03:38,827 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 58 states, 58 states have (on average 3.0) internal successors, (174), 58 states have internal predecessors, (174), 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) [2024-10-10 22:03:40,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:40,358 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2024-10-10 22:03:40,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-10 22:03:40,359 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.0) internal successors, (174), 58 states have internal predecessors, (174), 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 70 [2024-10-10 22:03:40,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:40,360 INFO L225 Difference]: With dead ends: 80 [2024-10-10 22:03:40,360 INFO L226 Difference]: Without dead ends: 78 [2024-10-10 22:03:40,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 104 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1727, Invalid=5079, Unknown=0, NotChecked=0, Total=6806 [2024-10-10 22:03:40,362 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:40,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-10 22:03:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-10 22:03:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2024-10-10 22:03:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 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) [2024-10-10 22:03:40,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2024-10-10 22:03:40,376 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2024-10-10 22:03:40,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:40,376 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2024-10-10 22:03:40,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.0) internal successors, (174), 58 states have internal predecessors, (174), 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) [2024-10-10 22:03:40,376 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2024-10-10 22:03:40,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-10 22:03:40,377 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:40,377 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:40,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-10 22:03:40,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-10 22:03:40,582 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:40,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash 558146026, now seen corresponding path program 19 times [2024-10-10 22:03:40,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:40,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752944886] [2024-10-10 22:03:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:40,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 156 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:40,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752944886] [2024-10-10 22:03:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752944886] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741808115] [2024-10-10 22:03:40,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:03:40,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:40,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:40,868 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:40,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-10 22:03:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:41,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-10 22:03:41,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:41,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 208 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:41,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741808115] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:41,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:41,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 26] total 39 [2024-10-10 22:03:41,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085309370] [2024-10-10 22:03:41,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:41,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-10 22:03:41,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-10 22:03:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=896, Unknown=0, NotChecked=0, Total=1482 [2024-10-10 22:03:41,461 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 39 states, 39 states have (on average 3.717948717948718) internal successors, (145), 39 states have internal predecessors, (145), 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) [2024-10-10 22:03:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:41,590 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2024-10-10 22:03:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-10 22:03:41,591 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.717948717948718) internal successors, (145), 39 states have internal predecessors, (145), 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 73 [2024-10-10 22:03:41,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:41,591 INFO L225 Difference]: With dead ends: 124 [2024-10-10 22:03:41,591 INFO L226 Difference]: Without dead ends: 78 [2024-10-10 22:03:41,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=946, Unknown=0, NotChecked=0, Total=1560 [2024-10-10 22:03:41,592 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:41,592 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-10 22:03:41,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2024-10-10 22:03:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 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) [2024-10-10 22:03:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2024-10-10 22:03:41,602 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 73 [2024-10-10 22:03:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:41,602 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2024-10-10 22:03:41,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.717948717948718) internal successors, (145), 39 states have internal predecessors, (145), 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) [2024-10-10 22:03:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2024-10-10 22:03:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-10 22:03:41,603 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:41,603 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:41,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:41,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:41,804 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:41,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:41,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1368073178, now seen corresponding path program 20 times [2024-10-10 22:03:41,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:41,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662758669] [2024-10-10 22:03:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:41,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 41 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:43,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:43,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662758669] [2024-10-10 22:03:43,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662758669] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:43,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527101170] [2024-10-10 22:03:43,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:03:43,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:43,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:43,374 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:43,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-10 22:03:43,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:03:43,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:43,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-10-10 22:03:43,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:43,514 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 18 treesize of output 14 [2024-10-10 22:03:43,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2024-10-10 22:03:43,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2024-10-10 22:03:43,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 54 treesize of output 35 [2024-10-10 22:03:43,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 49 [2024-10-10 22:03:43,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 68 treesize of output 52 [2024-10-10 22:03:43,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 61 treesize of output 66 [2024-10-10 22:03:43,654 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 69 [2024-10-10 22:03:43,665 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 83 [2024-10-10 22:03:43,711 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 86 [2024-10-10 22:03:43,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 100 [2024-10-10 22:03:43,783 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 110 treesize of output 103 [2024-10-10 22:03:43,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 103 treesize of output 117 [2024-10-10 22:03:43,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 124 treesize of output 120 [2024-10-10 22:03:43,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 117 treesize of output 134 [2024-10-10 22:03:43,960 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 138 treesize of output 137 [2024-10-10 22:03:43,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:43,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 131 treesize of output 151 [2024-10-10 22:03:44,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:44,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 152 treesize of output 154 [2024-10-10 22:03:44,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:44,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 145 treesize of output 168 [2024-10-10 22:03:44,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:44,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 166 treesize of output 171 [2024-10-10 22:03:44,214 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:44,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 159 treesize of output 185 [2024-10-10 22:03:44,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:44,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-10-10 22:03:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 199 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:45,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 55 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:46,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527101170] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:46,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:46,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29, 29] total 76 [2024-10-10 22:03:46,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193458458] [2024-10-10 22:03:46,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:46,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-10-10 22:03:46,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-10-10 22:03:46,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=4807, Unknown=0, NotChecked=0, Total=5700 [2024-10-10 22:03:46,719 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 76 states, 76 states have (on average 2.8947368421052633) internal successors, (220), 76 states have internal predecessors, (220), 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) [2024-10-10 22:03:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:50,093 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2024-10-10 22:03:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-10 22:03:50,093 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.8947368421052633) internal successors, (220), 76 states have internal predecessors, (220), 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 76 [2024-10-10 22:03:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:50,094 INFO L225 Difference]: With dead ends: 86 [2024-10-10 22:03:50,094 INFO L226 Difference]: Without dead ends: 84 [2024-10-10 22:03:50,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3433, Invalid=12569, Unknown=0, NotChecked=0, Total=16002 [2024-10-10 22:03:50,095 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 112 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:50,095 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 48 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-10 22:03:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-10 22:03:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2024-10-10 22:03:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2024-10-10 22:03:50,106 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2024-10-10 22:03:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:50,106 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2024-10-10 22:03:50,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.8947368421052633) internal successors, (220), 76 states have internal predecessors, (220), 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) [2024-10-10 22:03:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2024-10-10 22:03:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-10 22:03:50,107 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:50,107 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:50,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-10 22:03:50,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-10 22:03:50,310 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:50,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:50,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1318037396, now seen corresponding path program 21 times [2024-10-10 22:03:50,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:50,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818102962] [2024-10-10 22:03:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:50,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 188 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:50,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:50,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818102962] [2024-10-10 22:03:50,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818102962] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:50,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321313682] [2024-10-10 22:03:50,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 22:03:50,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:50,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:50,563 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:50,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-10 22:03:51,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-10-10 22:03:51,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:51,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-10 22:03:51,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 222 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:51,392 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 245 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:51,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321313682] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:51,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:51,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28, 28] total 42 [2024-10-10 22:03:51,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789055171] [2024-10-10 22:03:51,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:51,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-10 22:03:51,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:51,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-10 22:03:51,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1042, Unknown=0, NotChecked=0, Total=1722 [2024-10-10 22:03:51,658 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 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) [2024-10-10 22:03:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:03:51,794 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2024-10-10 22:03:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-10 22:03:51,795 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 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 79 [2024-10-10 22:03:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:03:51,795 INFO L225 Difference]: With dead ends: 133 [2024-10-10 22:03:51,795 INFO L226 Difference]: Without dead ends: 84 [2024-10-10 22:03:51,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=710, Invalid=1096, Unknown=0, NotChecked=0, Total=1806 [2024-10-10 22:03:51,796 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:03:51,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 86 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:03:51,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-10-10 22:03:51,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2024-10-10 22:03:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-10 22:03:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2024-10-10 22:03:51,807 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2024-10-10 22:03:51,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:03:51,808 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2024-10-10 22:03:51,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 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) [2024-10-10 22:03:51,808 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2024-10-10 22:03:51,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-10-10 22:03:51,808 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:03:51,808 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:03:51,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-10 22:03:52,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-10 22:03:52,009 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:03:52,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:03:52,009 INFO L85 PathProgramCache]: Analyzing trace with hash 704837032, now seen corresponding path program 22 times [2024-10-10 22:03:52,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:03:52,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355667604] [2024-10-10 22:03:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:03:52,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:03:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:03:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 54 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:53,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:03:53,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355667604] [2024-10-10 22:03:53,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355667604] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:03:53,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379612676] [2024-10-10 22:03:53,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 22:03:53,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:03:53,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:03:53,892 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:03:53,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-10 22:03:54,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 22:03:54,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:03:54,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-10-10 22:03:54,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:03:54,087 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 18 treesize of output 14 [2024-10-10 22:03:54,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2024-10-10 22:03:54,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2024-10-10 22:03:54,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 54 treesize of output 35 [2024-10-10 22:03:54,156 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 49 [2024-10-10 22:03:54,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 68 treesize of output 52 [2024-10-10 22:03:54,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 61 treesize of output 66 [2024-10-10 22:03:54,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 69 [2024-10-10 22:03:54,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 83 [2024-10-10 22:03:54,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 86 [2024-10-10 22:03:54,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 100 [2024-10-10 22:03:54,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 110 treesize of output 103 [2024-10-10 22:03:54,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 103 treesize of output 117 [2024-10-10 22:03:54,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 124 treesize of output 120 [2024-10-10 22:03:54,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 117 treesize of output 134 [2024-10-10 22:03:54,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 138 treesize of output 137 [2024-10-10 22:03:54,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 131 treesize of output 151 [2024-10-10 22:03:54,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 152 treesize of output 154 [2024-10-10 22:03:54,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 145 treesize of output 168 [2024-10-10 22:03:54,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 166 treesize of output 171 [2024-10-10 22:03:54,908 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:54,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 159 treesize of output 185 [2024-10-10 22:03:55,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:55,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 180 treesize of output 188 [2024-10-10 22:03:55,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:55,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 173 treesize of output 202 [2024-10-10 22:03:55,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:03:55,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-10-10 22:03:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 235 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:57,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:03:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 60 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:03:58,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379612676] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:03:58,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:03:58,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 89 [2024-10-10 22:03:58,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572529127] [2024-10-10 22:03:58,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:03:58,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-10-10 22:03:58,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:03:58,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-10-10 22:03:58,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1415, Invalid=6417, Unknown=0, NotChecked=0, Total=7832 [2024-10-10 22:03:58,104 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 89 states, 89 states have (on average 2.6741573033707864) internal successors, (238), 89 states have internal predecessors, (238), 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) [2024-10-10 22:04:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:04:02,397 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2024-10-10 22:04:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-10-10 22:04:02,398 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.6741573033707864) internal successors, (238), 89 states have internal predecessors, (238), 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 82 [2024-10-10 22:04:02,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:04:02,398 INFO L225 Difference]: With dead ends: 92 [2024-10-10 22:04:02,398 INFO L226 Difference]: Without dead ends: 90 [2024-10-10 22:04:02,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5933 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4425, Invalid=16455, Unknown=0, NotChecked=0, Total=20880 [2024-10-10 22:04:02,401 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-10 22:04:02,401 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 56 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-10 22:04:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-10 22:04:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2024-10-10 22:04:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 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) [2024-10-10 22:04:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2024-10-10 22:04:02,417 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2024-10-10 22:04:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:04:02,417 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2024-10-10 22:04:02,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.6741573033707864) internal successors, (238), 89 states have internal predecessors, (238), 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) [2024-10-10 22:04:02,418 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2024-10-10 22:04:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-10-10 22:04:02,418 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:04:02,418 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:04:02,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-10 22:04:02,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:04:02,619 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:04:02,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:04:02,619 INFO L85 PathProgramCache]: Analyzing trace with hash -289753174, now seen corresponding path program 23 times [2024-10-10 22:04:02,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:04:02,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362747652] [2024-10-10 22:04:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:04:02,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:04:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:04:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 223 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:02,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:04:02,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362747652] [2024-10-10 22:04:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362747652] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:04:02,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395027210] [2024-10-10 22:04:02,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 22:04:02,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:04:02,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:04:02,918 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:04:02,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-10 22:04:03,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-10-10 22:04:03,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:04:03,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-10 22:04:03,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:04:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 260 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:03,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:04:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 285 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:04,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395027210] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:04:04,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:04:04,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30, 30] total 45 [2024-10-10 22:04:04,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163770756] [2024-10-10 22:04:04,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:04:04,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-10 22:04:04,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:04:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-10 22:04:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=1199, Unknown=0, NotChecked=0, Total=1980 [2024-10-10 22:04:04,145 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 45 states, 45 states have (on average 3.7555555555555555) internal successors, (169), 45 states have internal predecessors, (169), 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) [2024-10-10 22:04:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:04:04,289 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2024-10-10 22:04:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-10 22:04:04,289 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.7555555555555555) internal successors, (169), 45 states have internal predecessors, (169), 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 85 [2024-10-10 22:04:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:04:04,290 INFO L225 Difference]: With dead ends: 142 [2024-10-10 22:04:04,290 INFO L226 Difference]: Without dead ends: 90 [2024-10-10 22:04:04,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 141 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=813, Invalid=1257, Unknown=0, NotChecked=0, Total=2070 [2024-10-10 22:04:04,291 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:04:04,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 78 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:04:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-10 22:04:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2024-10-10 22:04:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 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) [2024-10-10 22:04:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2024-10-10 22:04:04,303 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 85 [2024-10-10 22:04:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:04:04,303 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2024-10-10 22:04:04,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.7555555555555555) internal successors, (169), 45 states have internal predecessors, (169), 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) [2024-10-10 22:04:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2024-10-10 22:04:04,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-10-10 22:04:04,304 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:04:04,304 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:04:04,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-10 22:04:04,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:04:04,504 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:04:04,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:04:04,505 INFO L85 PathProgramCache]: Analyzing trace with hash -904300570, now seen corresponding path program 24 times [2024-10-10 22:04:04,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:04:04,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608868132] [2024-10-10 22:04:04,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:04:04,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:04:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:04:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 40 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:06,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:04:06,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608868132] [2024-10-10 22:04:06,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608868132] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:04:06,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634599341] [2024-10-10 22:04:06,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 22:04:06,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:04:06,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:04:06,363 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:04:06,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-10 22:04:07,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-10-10 22:04:07,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:04:07,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-10-10 22:04:07,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:04:07,780 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 17 treesize of output 13 [2024-10-10 22:04:07,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-10-10 22:04:07,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2024-10-10 22:04:07,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:07,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 33 [2024-10-10 22:04:07,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:07,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 44 treesize of output 46 [2024-10-10 22:04:07,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:07,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 63 treesize of output 49 [2024-10-10 22:04:07,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:07,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 57 treesize of output 62 [2024-10-10 22:04:07,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:07,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 65 [2024-10-10 22:04:07,951 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:07,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 78 [2024-10-10 22:04:08,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 81 [2024-10-10 22:04:08,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 94 [2024-10-10 22:04:08,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 102 treesize of output 97 [2024-10-10 22:04:08,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 96 treesize of output 110 [2024-10-10 22:04:08,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 115 treesize of output 113 [2024-10-10 22:04:08,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 109 treesize of output 126 [2024-10-10 22:04:08,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 128 treesize of output 129 [2024-10-10 22:04:08,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 122 treesize of output 142 [2024-10-10 22:04:08,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 141 treesize of output 145 [2024-10-10 22:04:08,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 135 treesize of output 158 [2024-10-10 22:04:08,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 154 treesize of output 161 [2024-10-10 22:04:08,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 148 treesize of output 174 [2024-10-10 22:04:08,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 167 treesize of output 177 [2024-10-10 22:04:08,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 161 treesize of output 190 [2024-10-10 22:04:08,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:08,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 180 treesize of output 193 [2024-10-10 22:04:09,025 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:09,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 174 treesize of output 206 [2024-10-10 22:04:09,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:09,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 91 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 103 treesize of output 138 [2024-10-10 22:04:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 274 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:11,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:04:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 65 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:12,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634599341] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:04:12,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:04:12,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 34, 33] total 68 [2024-10-10 22:04:12,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973178879] [2024-10-10 22:04:12,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:04:12,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-10-10 22:04:12,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:04:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-10-10 22:04:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=3499, Unknown=0, NotChecked=0, Total=4556 [2024-10-10 22:04:12,010 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 68 states, 68 states have (on average 3.2058823529411766) internal successors, (218), 68 states have internal predecessors, (218), 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) [2024-10-10 22:04:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:04:13,980 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2024-10-10 22:04:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-10 22:04:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.2058823529411766) internal successors, (218), 68 states have internal predecessors, (218), 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 88 [2024-10-10 22:04:13,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:04:13,981 INFO L225 Difference]: With dead ends: 98 [2024-10-10 22:04:13,981 INFO L226 Difference]: Without dead ends: 96 [2024-10-10 22:04:13,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 136 SyntacticMatches, 17 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2445, Invalid=7257, Unknown=0, NotChecked=0, Total=9702 [2024-10-10 22:04:13,982 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-10 22:04:13,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 38 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-10 22:04:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-10 22:04:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2024-10-10 22:04:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 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) [2024-10-10 22:04:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2024-10-10 22:04:13,996 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 88 [2024-10-10 22:04:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:04:13,996 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2024-10-10 22:04:13,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.2058823529411766) internal successors, (218), 68 states have internal predecessors, (218), 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) [2024-10-10 22:04:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2024-10-10 22:04:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-10-10 22:04:13,997 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:04:13,997 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:04:14,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-10 22:04:14,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-10 22:04:14,197 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:04:14,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:04:14,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1978063700, now seen corresponding path program 25 times [2024-10-10 22:04:14,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:04:14,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873195044] [2024-10-10 22:04:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:04:14,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:04:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:04:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 261 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:14,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:04:14,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873195044] [2024-10-10 22:04:14,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873195044] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:04:14,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170095750] [2024-10-10 22:04:14,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 22:04:14,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:04:14,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:04:14,470 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:04:14,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-10 22:04:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:04:14,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-10 22:04:14,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:04:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 301 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:14,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:04:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 328 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:15,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170095750] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:04:15,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:04:15,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32, 32] total 48 [2024-10-10 22:04:15,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272212405] [2024-10-10 22:04:15,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:04:15,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-10 22:04:15,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:04:15,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-10 22:04:15,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=889, Invalid=1367, Unknown=0, NotChecked=0, Total=2256 [2024-10-10 22:04:15,232 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 48 states, 48 states have (on average 3.7708333333333335) internal successors, (181), 48 states have internal predecessors, (181), 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) [2024-10-10 22:04:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 22:04:15,405 INFO L93 Difference]: Finished difference Result 151 states and 156 transitions. [2024-10-10 22:04:15,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-10 22:04:15,405 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.7708333333333335) internal successors, (181), 48 states have internal predecessors, (181), 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 91 [2024-10-10 22:04:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 22:04:15,406 INFO L225 Difference]: With dead ends: 151 [2024-10-10 22:04:15,406 INFO L226 Difference]: Without dead ends: 96 [2024-10-10 22:04:15,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 151 SyntacticMatches, 15 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2024-10-10 22:04:15,407 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-10 22:04:15,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-10 22:04:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-10 22:04:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2024-10-10 22:04:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 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) [2024-10-10 22:04:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2024-10-10 22:04:15,421 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 91 [2024-10-10 22:04:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 22:04:15,421 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2024-10-10 22:04:15,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.7708333333333335) internal successors, (181), 48 states have internal predecessors, (181), 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) [2024-10-10 22:04:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2024-10-10 22:04:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-10-10 22:04:15,422 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 22:04:15,422 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 22:04:15,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-10 22:04:15,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-10 22:04:15,622 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 22:04:15,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 22:04:15,623 INFO L85 PathProgramCache]: Analyzing trace with hash -111294488, now seen corresponding path program 26 times [2024-10-10 22:04:15,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 22:04:15,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350865097] [2024-10-10 22:04:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 22:04:15,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 22:04:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 22:04:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 69 proven. 562 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:18,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 22:04:18,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350865097] [2024-10-10 22:04:18,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350865097] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 22:04:18,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164183030] [2024-10-10 22:04:18,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 22:04:18,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 22:04:18,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 22:04:18,024 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 22:04:18,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-10 22:04:18,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 22:04:18,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 22:04:18,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-10-10 22:04:18,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 22:04:18,214 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 18 treesize of output 14 [2024-10-10 22:04:18,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2024-10-10 22:04:18,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2024-10-10 22:04:18,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 54 treesize of output 35 [2024-10-10 22:04:18,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 49 [2024-10-10 22:04:18,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 68 treesize of output 52 [2024-10-10 22:04:18,319 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 61 treesize of output 66 [2024-10-10 22:04:18,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 69 [2024-10-10 22:04:18,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 83 [2024-10-10 22:04:18,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 86 [2024-10-10 22:04:18,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 100 [2024-10-10 22:04:18,498 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 110 treesize of output 103 [2024-10-10 22:04:18,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 103 treesize of output 117 [2024-10-10 22:04:18,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 124 treesize of output 120 [2024-10-10 22:04:18,598 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 117 treesize of output 134 [2024-10-10 22:04:18,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 138 treesize of output 137 [2024-10-10 22:04:18,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 131 treesize of output 151 [2024-10-10 22:04:18,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 152 treesize of output 154 [2024-10-10 22:04:18,817 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 145 treesize of output 168 [2024-10-10 22:04:18,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 166 treesize of output 171 [2024-10-10 22:04:18,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:18,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 159 treesize of output 185 [2024-10-10 22:04:19,081 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:19,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 180 treesize of output 188 [2024-10-10 22:04:19,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:19,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 173 treesize of output 202 [2024-10-10 22:04:19,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:19,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 194 treesize of output 205 [2024-10-10 22:04:19,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:19,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 187 treesize of output 219 [2024-10-10 22:04:19,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:19,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 208 treesize of output 222 [2024-10-10 22:04:19,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:19,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 201 treesize of output 236 [2024-10-10 22:04:19,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-10 22:04:19,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2024-10-10 22:04:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 316 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:22,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 22:04:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 70 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-10 22:04:23,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164183030] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 22:04:23,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 22:04:23,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 101 [2024-10-10 22:04:23,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47257226] [2024-10-10 22:04:23,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 22:04:23,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-10-10 22:04:23,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 22:04:23,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-10-10 22:04:23,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1338, Invalid=8762, Unknown=0, NotChecked=0, Total=10100 [2024-10-10 22:04:23,578 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 101 states, 101 states have (on average 2.712871287128713) internal successors, (274), 101 states have internal predecessors, (274), 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)