./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/pr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 374c198ea90130277bd1a124bc94571dd240bc0803e6f3936a68065c719ddd5a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-13 22:11:57,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 22:11:57,818 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 22:11:57,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 22:11:57,822 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 22:11:57,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 22:11:57,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 22:11:57,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 22:11:57,849 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 22:11:57,850 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 22:11:57,850 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 22:11:57,850 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 22:11:57,851 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 22:11:57,851 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 22:11:57,853 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 22:11:57,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 22:11:57,853 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 22:11:57,854 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 22:11:57,854 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 22:11:57,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 22:11:57,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 22:11:57,858 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 22:11:57,858 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 22:11:57,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 22:11:57,859 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 22:11:57,859 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 22:11:57,859 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 22:11:57,859 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 22:11:57,860 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 22:11:57,860 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 22:11:57,860 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 22:11:57,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 22:11:57,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:11:57,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 22:11:57,861 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 22:11:57,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 22:11:57,861 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 22:11:57,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 22:11:57,861 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 22:11:57,862 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 22:11:57,862 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 22:11:57,862 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 22:11:57,862 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 374c198ea90130277bd1a124bc94571dd240bc0803e6f3936a68065c719ddd5a [2024-10-13 22:11:58,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 22:11:58,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 22:11:58,120 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 22:11:58,121 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 22:11:58,122 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 22:11:58,123 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c [2024-10-13 22:11:59,532 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 22:11:59,715 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 22:11:59,715 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c [2024-10-13 22:11:59,721 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5222c7b0e/5a54167f847f4d01be28658e1620727e/FLAG60f705ca6 [2024-10-13 22:12:00,106 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5222c7b0e/5a54167f847f4d01be28658e1620727e [2024-10-13 22:12:00,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 22:12:00,109 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 22:12:00,111 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 22:12:00,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 22:12:00,117 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 22:12:00,118 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,120 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31776409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00, skipping insertion in model container [2024-10-13 22:12:00,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,141 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 22:12:00,294 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/pr5.c[394,407] [2024-10-13 22:12:00,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:12:00,343 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 22:12:00,376 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/pr5.c[394,407] [2024-10-13 22:12:00,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 22:12:00,414 INFO L204 MainTranslator]: Completed translation [2024-10-13 22:12:00,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00 WrapperNode [2024-10-13 22:12:00,415 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 22:12:00,416 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 22:12:00,417 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 22:12:00,417 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 22:12:00,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,434 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,466 INFO L138 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2024-10-13 22:12:00,467 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 22:12:00,467 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 22:12:00,468 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 22:12:00,468 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 22:12:00,477 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,481 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,499 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 6, 12]. 60 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 10 writes are split as follows [0, 0, 10]. [2024-10-13 22:12:00,500 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,500 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,509 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,516 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,517 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,517 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,519 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 22:12:00,520 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 22:12:00,520 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 22:12:00,520 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 22:12:00,521 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (1/1) ... [2024-10-13 22:12:00,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 22:12:00,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:00,561 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 22:12:00,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 22:12:00,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 22:12:00,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 22:12:00,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 22:12:00,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 22:12:00,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 22:12:00,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 22:12:00,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 22:12:00,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 22:12:00,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 22:12:00,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 22:12:00,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 22:12:00,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 22:12:00,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 22:12:00,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 22:12:00,664 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 22:12:00,665 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 22:12:00,832 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-13 22:12:00,832 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 22:12:00,861 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 22:12:00,862 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 22:12:00,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:12:00 BoogieIcfgContainer [2024-10-13 22:12:00,862 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 22:12:00,866 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 22:12:00,866 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 22:12:00,870 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 22:12:00,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:12:00" (1/3) ... [2024-10-13 22:12:00,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a552e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:12:00, skipping insertion in model container [2024-10-13 22:12:00,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:12:00" (2/3) ... [2024-10-13 22:12:00,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55a552e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:12:00, skipping insertion in model container [2024-10-13 22:12:00,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:12:00" (3/3) ... [2024-10-13 22:12:00,873 INFO L112 eAbstractionObserver]: Analyzing ICFG pr5.c [2024-10-13 22:12:00,888 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 22:12:00,889 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 22:12:00,932 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 22:12:00,938 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;@1094cf83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 22:12:00,938 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-13 22:12:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 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) [2024-10-13 22:12:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-13 22:12:00,948 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:00,949 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:00,950 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:00,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:00,954 INFO L85 PathProgramCache]: Analyzing trace with hash -202686182, now seen corresponding path program 1 times [2024-10-13 22:12:00,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:00,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9783365] [2024-10-13 22:12:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:00,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:01,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:01,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9783365] [2024-10-13 22:12:01,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9783365] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:01,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:01,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 22:12:01,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914294635] [2024-10-13 22:12:01,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:01,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 22:12:01,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:01,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 22:12:01,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 22:12:01,175 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:01,198 INFO L93 Difference]: Finished difference Result 44 states and 67 transitions. [2024-10-13 22:12:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 22:12:01,200 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2024-10-13 22:12:01,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:01,206 INFO L225 Difference]: With dead ends: 44 [2024-10-13 22:12:01,206 INFO L226 Difference]: Without dead ends: 20 [2024-10-13 22:12:01,210 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 [2024-10-13 22:12:01,212 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:01,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-13 22:12:01,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-13 22:12:01,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:01,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2024-10-13 22:12:01,238 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 12 [2024-10-13 22:12:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:01,239 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2024-10-13 22:12:01,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2024-10-13 22:12:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-13 22:12:01,240 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:01,240 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:01,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 22:12:01,241 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:01,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:01,241 INFO L85 PathProgramCache]: Analyzing trace with hash 477372188, now seen corresponding path program 1 times [2024-10-13 22:12:01,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:01,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954356718] [2024-10-13 22:12:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:01,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:01,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:01,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954356718] [2024-10-13 22:12:01,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954356718] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:01,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:01,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:12:01,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215935633] [2024-10-13 22:12:01,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:01,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:12:01,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:12:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:12:01,487 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:01,524 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2024-10-13 22:12:01,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:12:01,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2024-10-13 22:12:01,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:01,525 INFO L225 Difference]: With dead ends: 24 [2024-10-13 22:12:01,525 INFO L226 Difference]: Without dead ends: 22 [2024-10-13 22:12:01,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:12:01,527 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:01,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-13 22:12:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-13 22:12:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2024-10-13 22:12:01,534 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 12 [2024-10-13 22:12:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:01,535 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2024-10-13 22:12:01,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2024-10-13 22:12:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-13 22:12:01,536 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:01,536 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:01,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 22:12:01,537 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:01,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:01,537 INFO L85 PathProgramCache]: Analyzing trace with hash 477431770, now seen corresponding path program 1 times [2024-10-13 22:12:01,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903571383] [2024-10-13 22:12:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:01,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:01,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:01,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:01,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903571383] [2024-10-13 22:12:01,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903571383] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:01,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:01,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 22:12:01,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850540760] [2024-10-13 22:12:01,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:01,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 22:12:01,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 22:12:01,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:12:01,773 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:01,863 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2024-10-13 22:12:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 22:12:01,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2024-10-13 22:12:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:01,865 INFO L225 Difference]: With dead ends: 39 [2024-10-13 22:12:01,865 INFO L226 Difference]: Without dead ends: 29 [2024-10-13 22:12:01,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:12:01,868 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:01,870 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 16 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:12:01,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-13 22:12:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2024-10-13 22:12:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:01,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2024-10-13 22:12:01,879 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2024-10-13 22:12:01,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:01,879 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2024-10-13 22:12:01,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2024-10-13 22:12:01,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 22:12:01,881 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:01,881 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:01,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 22:12:01,882 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:01,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash -615428095, now seen corresponding path program 1 times [2024-10-13 22:12:01,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:01,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259409644] [2024-10-13 22:12:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:01,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:02,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:02,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259409644] [2024-10-13 22:12:02,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259409644] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:02,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:02,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:12:02,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212796807] [2024-10-13 22:12:02,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:02,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:12:02,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:12:02,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:12:02,022 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2024-10-13 22:12:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:02,081 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2024-10-13 22:12:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:12:02,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) Word has length 19 [2024-10-13 22:12:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:02,083 INFO L225 Difference]: With dead ends: 57 [2024-10-13 22:12:02,084 INFO L226 Difference]: Without dead ends: 40 [2024-10-13 22:12:02,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:12:02,086 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:02,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-10-13 22:12:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2024-10-13 22:12:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2024-10-13 22:12:02,098 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 19 [2024-10-13 22:12:02,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:02,098 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2024-10-13 22:12:02,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2024-10-13 22:12:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2024-10-13 22:12:02,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 22:12:02,099 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:02,100 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:02,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 22:12:02,100 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:02,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:02,101 INFO L85 PathProgramCache]: Analyzing trace with hash 64630275, now seen corresponding path program 1 times [2024-10-13 22:12:02,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:02,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074787890] [2024-10-13 22:12:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:02,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:02,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:02,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074787890] [2024-10-13 22:12:02,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074787890] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:02,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:02,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:12:02,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923732279] [2024-10-13 22:12:02,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:02,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:12:02,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:02,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:12:02,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:12:02,197 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2024-10-13 22:12:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:02,261 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2024-10-13 22:12:02,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:12:02,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) Word has length 19 [2024-10-13 22:12:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:02,263 INFO L225 Difference]: With dead ends: 74 [2024-10-13 22:12:02,263 INFO L226 Difference]: Without dead ends: 47 [2024-10-13 22:12:02,264 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:12:02,265 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:02,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 28 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-13 22:12:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2024-10-13 22:12:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2024-10-13 22:12:02,277 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 19 [2024-10-13 22:12:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:02,278 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2024-10-13 22:12:02,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2024-10-13 22:12:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2024-10-13 22:12:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 22:12:02,279 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:02,279 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:02,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 22:12:02,280 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:02,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash -222401085, now seen corresponding path program 1 times [2024-10-13 22:12:02,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:02,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064416503] [2024-10-13 22:12:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:02,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:02,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:02,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064416503] [2024-10-13 22:12:02,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064416503] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:02,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590241082] [2024-10-13 22:12:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:02,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:02,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:02,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:02,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 22:12:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:02,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 22:12:02,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:02,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:03,031 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 23 treesize of output 11 [2024-10-13 22:12:03,059 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 23 treesize of output 11 [2024-10-13 22:12:03,079 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 23 treesize of output 11 [2024-10-13 22:12:03,110 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 23 treesize of output 11 [2024-10-13 22:12:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:03,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:03,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-13 22:12:03,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-13 22:12:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:03,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590241082] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:03,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:03,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-10-13 22:12:03,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669627298] [2024-10-13 22:12:03,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:03,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 22:12:03,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 22:12:03,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-10-13 22:12:03,444 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2024-10-13 22:12:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:04,189 INFO L93 Difference]: Finished difference Result 132 states and 177 transitions. [2024-10-13 22:12:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 22:12:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) Word has length 19 [2024-10-13 22:12:04,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:04,192 INFO L225 Difference]: With dead ends: 132 [2024-10-13 22:12:04,192 INFO L226 Difference]: Without dead ends: 115 [2024-10-13 22:12:04,192 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2024-10-13 22:12:04,193 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 424 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:04,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 128 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:12:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-13 22:12:04,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 59. [2024-10-13 22:12:04,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 58 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2024-10-13 22:12:04,212 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 19 [2024-10-13 22:12:04,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:04,212 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2024-10-13 22:12:04,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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) [2024-10-13 22:12:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2024-10-13 22:12:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-13 22:12:04,214 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:04,214 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:04,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 22:12:04,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-13 22:12:04,415 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:04,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:04,416 INFO L85 PathProgramCache]: Analyzing trace with hash -522175739, now seen corresponding path program 1 times [2024-10-13 22:12:04,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:04,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837986338] [2024-10-13 22:12:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:04,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:04,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:04,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837986338] [2024-10-13 22:12:04,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837986338] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:04,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103355817] [2024-10-13 22:12:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:04,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:04,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:04,821 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:04,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 22:12:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:04,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-13 22:12:04,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:04,962 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 11 treesize of output 7 [2024-10-13 22:12:04,978 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 23 treesize of output 11 [2024-10-13 22:12:04,998 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 23 treesize of output 11 [2024-10-13 22:12:05,012 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 23 treesize of output 11 [2024-10-13 22:12:05,023 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 19 treesize of output 18 [2024-10-13 22:12:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:05,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:05,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-10-13 22:12:05,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-10-13 22:12:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:05,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103355817] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:05,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:05,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 17 [2024-10-13 22:12:05,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896328528] [2024-10-13 22:12:05,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:05,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 22:12:05,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:05,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 22:12:05,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-10-13 22:12:05,165 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:05,866 INFO L93 Difference]: Finished difference Result 149 states and 199 transitions. [2024-10-13 22:12:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 22:12:05,866 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2024-10-13 22:12:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:05,867 INFO L225 Difference]: With dead ends: 149 [2024-10-13 22:12:05,867 INFO L226 Difference]: Without dead ends: 147 [2024-10-13 22:12:05,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=361, Invalid=1361, Unknown=0, NotChecked=0, Total=1722 [2024-10-13 22:12:05,871 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 182 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:05,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 80 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:12:05,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-10-13 22:12:05,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 62. [2024-10-13 22:12:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 61 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) [2024-10-13 22:12:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 88 transitions. [2024-10-13 22:12:05,890 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 88 transitions. Word has length 19 [2024-10-13 22:12:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:05,890 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 88 transitions. [2024-10-13 22:12:05,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 88 transitions. [2024-10-13 22:12:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 22:12:05,891 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:05,891 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:05,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 22:12:06,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-13 22:12:06,092 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:06,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:06,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1756058643, now seen corresponding path program 1 times [2024-10-13 22:12:06,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:06,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786087156] [2024-10-13 22:12:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:06,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:06,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786087156] [2024-10-13 22:12:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786087156] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:06,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747778950] [2024-10-13 22:12:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:06,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:06,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:06,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:06,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 22:12:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:06,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-13 22:12:06,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:06,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:06,631 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 23 treesize of output 11 [2024-10-13 22:12:06,645 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 23 treesize of output 11 [2024-10-13 22:12:06,660 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 23 treesize of output 11 [2024-10-13 22:12:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:06,832 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:06,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-13 22:12:06,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-13 22:12:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:07,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747778950] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:07,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:07,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-10-13 22:12:07,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290458187] [2024-10-13 22:12:07,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:07,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-13 22:12:07,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-13 22:12:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-10-13 22:12:07,002 INFO L87 Difference]: Start difference. First operand 62 states and 88 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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) [2024-10-13 22:12:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:07,786 INFO L93 Difference]: Finished difference Result 338 states and 482 transitions. [2024-10-13 22:12:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-13 22:12:07,786 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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) Word has length 24 [2024-10-13 22:12:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:07,788 INFO L225 Difference]: With dead ends: 338 [2024-10-13 22:12:07,789 INFO L226 Difference]: Without dead ends: 292 [2024-10-13 22:12:07,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=364, Invalid=1442, Unknown=0, NotChecked=0, Total=1806 [2024-10-13 22:12:07,790 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 347 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:07,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 118 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-13 22:12:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-10-13 22:12:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 132. [2024-10-13 22:12:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.4580152671755726) internal successors, (191), 131 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 191 transitions. [2024-10-13 22:12:07,807 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 191 transitions. Word has length 24 [2024-10-13 22:12:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:07,807 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 191 transitions. [2024-10-13 22:12:07,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 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) [2024-10-13 22:12:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 191 transitions. [2024-10-13 22:12:07,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 22:12:07,808 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:07,809 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:07,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 22:12:08,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:08,013 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:08,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash 167710741, now seen corresponding path program 1 times [2024-10-13 22:12:08,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:08,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166401361] [2024-10-13 22:12:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:08,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:12:08,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:08,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166401361] [2024-10-13 22:12:08,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166401361] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:08,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:08,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:12:08,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277949010] [2024-10-13 22:12:08,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:08,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:12:08,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:08,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:12:08,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:12:08,091 INFO L87 Difference]: Start difference. First operand 132 states and 191 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-10-13 22:12:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:08,134 INFO L93 Difference]: Finished difference Result 187 states and 266 transitions. [2024-10-13 22:12:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:12:08,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) Word has length 24 [2024-10-13 22:12:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:08,135 INFO L225 Difference]: With dead ends: 187 [2024-10-13 22:12:08,135 INFO L226 Difference]: Without dead ends: 136 [2024-10-13 22:12:08,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:12:08,136 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 39 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:08,136 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 42 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:08,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-10-13 22:12:08,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 122. [2024-10-13 22:12:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.396694214876033) internal successors, (169), 121 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) [2024-10-13 22:12:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 169 transitions. [2024-10-13 22:12:08,154 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 169 transitions. Word has length 24 [2024-10-13 22:12:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:08,155 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 169 transitions. [2024-10-13 22:12:08,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-10-13 22:12:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 169 transitions. [2024-10-13 22:12:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 22:12:08,156 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:08,157 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:08,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 22:12:08,157 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:08,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash -843406509, now seen corresponding path program 1 times [2024-10-13 22:12:08,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:08,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986744199] [2024-10-13 22:12:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:08,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:12:08,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:08,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986744199] [2024-10-13 22:12:08,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986744199] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:08,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:08,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:12:08,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161908018] [2024-10-13 22:12:08,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:08,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:12:08,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:08,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:12:08,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:12:08,219 INFO L87 Difference]: Start difference. First operand 122 states and 169 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-10-13 22:12:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:08,267 INFO L93 Difference]: Finished difference Result 148 states and 197 transitions. [2024-10-13 22:12:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:12:08,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) Word has length 24 [2024-10-13 22:12:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:08,268 INFO L225 Difference]: With dead ends: 148 [2024-10-13 22:12:08,269 INFO L226 Difference]: Without dead ends: 120 [2024-10-13 22:12:08,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:12:08,269 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:08,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 32 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:08,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-10-13 22:12:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2024-10-13 22:12:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.380952380952381) internal successors, (145), 105 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) [2024-10-13 22:12:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2024-10-13 22:12:08,282 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 24 [2024-10-13 22:12:08,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:08,282 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2024-10-13 22:12:08,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-10-13 22:12:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2024-10-13 22:12:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-13 22:12:08,283 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:08,283 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:08,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 22:12:08,283 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:08,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash 177552403, now seen corresponding path program 1 times [2024-10-13 22:12:08,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:08,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361530335] [2024-10-13 22:12:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:08,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:08,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:08,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361530335] [2024-10-13 22:12:08,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361530335] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:08,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655557700] [2024-10-13 22:12:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:08,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:08,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:08,560 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:08,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 22:12:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:08,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 22:12:08,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:08,673 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 11 treesize of output 7 [2024-10-13 22:12:08,703 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 23 treesize of output 11 [2024-10-13 22:12:08,732 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 23 treesize of output 11 [2024-10-13 22:12:08,752 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 23 treesize of output 11 [2024-10-13 22:12:08,762 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 19 treesize of output 18 [2024-10-13 22:12:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 22:12:08,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:08,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-13 22:12:08,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-13 22:12:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 22:12:08,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655557700] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:08,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:08,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-10-13 22:12:08,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064429457] [2024-10-13 22:12:08,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:08,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 22:12:08,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 22:12:08,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-13 22:12:08,943 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:09,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:09,606 INFO L93 Difference]: Finished difference Result 189 states and 242 transitions. [2024-10-13 22:12:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-13 22:12:09,606 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-13 22:12:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:09,607 INFO L225 Difference]: With dead ends: 189 [2024-10-13 22:12:09,607 INFO L226 Difference]: Without dead ends: 180 [2024-10-13 22:12:09,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=400, Invalid=1406, Unknown=0, NotChecked=0, Total=1806 [2024-10-13 22:12:09,608 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 161 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:09,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 190 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:12:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-10-13 22:12:09,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 126. [2024-10-13 22:12:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.352) internal successors, (169), 125 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) [2024-10-13 22:12:09,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 169 transitions. [2024-10-13 22:12:09,619 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 169 transitions. Word has length 24 [2024-10-13 22:12:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:09,620 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 169 transitions. [2024-10-13 22:12:09,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 169 transitions. [2024-10-13 22:12:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-13 22:12:09,621 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:09,621 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:09,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-13 22:12:09,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:09,821 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:09,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:09,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1514073208, now seen corresponding path program 1 times [2024-10-13 22:12:09,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:09,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906293044] [2024-10-13 22:12:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:09,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:09,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:09,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906293044] [2024-10-13 22:12:09,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906293044] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:09,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:09,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:12:09,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051820727] [2024-10-13 22:12:09,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:09,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:12:09,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:12:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:12:09,863 INFO L87 Difference]: Start difference. First operand 126 states and 169 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:09,894 INFO L93 Difference]: Finished difference Result 154 states and 199 transitions. [2024-10-13 22:12:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:12:09,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-13 22:12:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:09,896 INFO L225 Difference]: With dead ends: 154 [2024-10-13 22:12:09,896 INFO L226 Difference]: Without dead ends: 121 [2024-10-13 22:12:09,896 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 [2024-10-13 22:12:09,897 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:09,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 45 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:09,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-13 22:12:09,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 107. [2024-10-13 22:12:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.330188679245283) internal successors, (141), 106 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:09,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2024-10-13 22:12:09,906 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 141 transitions. Word has length 26 [2024-10-13 22:12:09,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:09,906 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 141 transitions. [2024-10-13 22:12:09,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:09,906 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 141 transitions. [2024-10-13 22:12:09,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-13 22:12:09,907 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:09,907 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:09,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 22:12:09,907 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:09,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash -916332605, now seen corresponding path program 2 times [2024-10-13 22:12:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:09,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486180842] [2024-10-13 22:12:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:09,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:10,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:10,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486180842] [2024-10-13 22:12:10,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486180842] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:10,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718458157] [2024-10-13 22:12:10,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:12:10,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:10,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:10,203 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:10,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 22:12:10,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:12:10,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:10,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-13 22:12:10,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:10,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:10,390 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 23 treesize of output 11 [2024-10-13 22:12:10,403 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 23 treesize of output 11 [2024-10-13 22:12:10,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 22:12:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:10,542 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:10,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-13 22:12:10,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-13 22:12:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:10,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718458157] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:10,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:10,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2024-10-13 22:12:10,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902656743] [2024-10-13 22:12:10,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:10,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-13 22:12:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:10,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-13 22:12:10,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-10-13 22:12:10,707 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:12,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:12,165 INFO L93 Difference]: Finished difference Result 489 states and 633 transitions. [2024-10-13 22:12:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-13 22:12:12,166 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-13 22:12:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:12,167 INFO L225 Difference]: With dead ends: 489 [2024-10-13 22:12:12,167 INFO L226 Difference]: Without dead ends: 446 [2024-10-13 22:12:12,169 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=903, Invalid=4209, Unknown=0, NotChecked=0, Total=5112 [2024-10-13 22:12:12,169 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 627 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:12,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 193 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 22:12:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2024-10-13 22:12:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 184. [2024-10-13 22:12:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.3060109289617485) internal successors, (239), 183 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 239 transitions. [2024-10-13 22:12:12,188 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 239 transitions. Word has length 29 [2024-10-13 22:12:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:12,189 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 239 transitions. [2024-10-13 22:12:12,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 239 transitions. [2024-10-13 22:12:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-13 22:12:12,190 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:12,191 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:12,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 22:12:12,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-13 22:12:12,393 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:12,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:12,394 INFO L85 PathProgramCache]: Analyzing trace with hash -510694009, now seen corresponding path program 1 times [2024-10-13 22:12:12,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:12,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092959340] [2024-10-13 22:12:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:12,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-13 22:12:12,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:12,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092959340] [2024-10-13 22:12:12,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092959340] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:12,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:12,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 22:12:12,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681028737] [2024-10-13 22:12:12,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:12,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 22:12:12,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:12,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 22:12:12,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 22:12:12,446 INFO L87 Difference]: Start difference. First operand 184 states and 239 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-10-13 22:12:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:12,502 INFO L93 Difference]: Finished difference Result 214 states and 271 transitions. [2024-10-13 22:12:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 22:12:12,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) Word has length 29 [2024-10-13 22:12:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:12,503 INFO L225 Difference]: With dead ends: 214 [2024-10-13 22:12:12,504 INFO L226 Difference]: Without dead ends: 157 [2024-10-13 22:12:12,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 22:12:12,504 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:12,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 32 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:12,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-10-13 22:12:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 143. [2024-10-13 22:12:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.232394366197183) internal successors, (175), 142 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 175 transitions. [2024-10-13 22:12:12,518 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 175 transitions. Word has length 29 [2024-10-13 22:12:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:12,519 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 175 transitions. [2024-10-13 22:12:12,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 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) [2024-10-13 22:12:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 175 transitions. [2024-10-13 22:12:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-13 22:12:12,520 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:12,520 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:12,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 22:12:12,520 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:12,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:12,520 INFO L85 PathProgramCache]: Analyzing trace with hash -622898171, now seen corresponding path program 1 times [2024-10-13 22:12:12,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:12,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704599697] [2024-10-13 22:12:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:12,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:12,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704599697] [2024-10-13 22:12:12,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704599697] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279554621] [2024-10-13 22:12:12,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:12,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:12,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:12,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 22:12:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:12,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-13 22:12:12,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:12,865 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 11 treesize of output 7 [2024-10-13 22:12:12,888 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 23 treesize of output 11 [2024-10-13 22:12:12,894 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 19 treesize of output 18 [2024-10-13 22:12:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:13,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:13,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-13 22:12:13,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 22:12:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:13,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279554621] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:13,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:13,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 19 [2024-10-13 22:12:13,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673238811] [2024-10-13 22:12:13,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:13,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 22:12:13,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 22:12:13,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-10-13 22:12:13,126 INFO L87 Difference]: Start difference. First operand 143 states and 175 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:13,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:13,700 INFO L93 Difference]: Finished difference Result 298 states and 367 transitions. [2024-10-13 22:12:13,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-13 22:12:13,700 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-10-13 22:12:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:13,701 INFO L225 Difference]: With dead ends: 298 [2024-10-13 22:12:13,701 INFO L226 Difference]: Without dead ends: 296 [2024-10-13 22:12:13,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2024-10-13 22:12:13,703 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 107 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:13,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 115 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-13 22:12:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2024-10-13 22:12:13,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 196. [2024-10-13 22:12:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2461538461538462) internal successors, (243), 195 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 243 transitions. [2024-10-13 22:12:13,721 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 243 transitions. Word has length 29 [2024-10-13 22:12:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:13,721 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 243 transitions. [2024-10-13 22:12:13,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 243 transitions. [2024-10-13 22:12:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-13 22:12:13,722 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:13,722 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:13,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 22:12:13,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-13 22:12:13,923 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:13,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:13,923 INFO L85 PathProgramCache]: Analyzing trace with hash -648616768, now seen corresponding path program 1 times [2024-10-13 22:12:13,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:13,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671303498] [2024-10-13 22:12:13,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:13,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 22:12:13,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:13,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671303498] [2024-10-13 22:12:13,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671303498] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:13,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:13,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:12:13,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168751546] [2024-10-13 22:12:13,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:13,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:12:13,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:13,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:12:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:12:13,952 INFO L87 Difference]: Start difference. First operand 196 states and 243 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:13,991 INFO L93 Difference]: Finished difference Result 224 states and 273 transitions. [2024-10-13 22:12:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:12:13,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2024-10-13 22:12:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:13,993 INFO L225 Difference]: With dead ends: 224 [2024-10-13 22:12:13,993 INFO L226 Difference]: Without dead ends: 186 [2024-10-13 22:12:13,993 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 [2024-10-13 22:12:13,994 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:13,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 33 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:13,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-10-13 22:12:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 172. [2024-10-13 22:12:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.239766081871345) internal successors, (212), 171 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 212 transitions. [2024-10-13 22:12:14,022 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 212 transitions. Word has length 31 [2024-10-13 22:12:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:14,022 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 212 transitions. [2024-10-13 22:12:14,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 212 transitions. [2024-10-13 22:12:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-13 22:12:14,023 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:14,023 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:14,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-13 22:12:14,024 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:14,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash -933289453, now seen corresponding path program 3 times [2024-10-13 22:12:14,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:14,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695135675] [2024-10-13 22:12:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:14,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695135675] [2024-10-13 22:12:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695135675] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098529953] [2024-10-13 22:12:14,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:12:14,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:14,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:14,335 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:14,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 22:12:14,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-13 22:12:14,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:14,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-13 22:12:14,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:14,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-13 22:12:14,488 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 29 treesize of output 13 [2024-10-13 22:12:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:14,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:14,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-13 22:12:14,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-13 22:12:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:14,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098529953] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:14,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:14,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-10-13 22:12:14,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018511222] [2024-10-13 22:12:14,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:14,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-13 22:12:14,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:14,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-13 22:12:14,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2024-10-13 22:12:14,961 INFO L87 Difference]: Start difference. First operand 172 states and 212 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 29 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) [2024-10-13 22:12:16,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:16,348 INFO L93 Difference]: Finished difference Result 434 states and 515 transitions. [2024-10-13 22:12:16,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-10-13 22:12:16,348 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 29 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) Word has length 34 [2024-10-13 22:12:16,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:16,350 INFO L225 Difference]: With dead ends: 434 [2024-10-13 22:12:16,350 INFO L226 Difference]: Without dead ends: 420 [2024-10-13 22:12:16,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=745, Invalid=3677, Unknown=0, NotChecked=0, Total=4422 [2024-10-13 22:12:16,351 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 321 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:16,351 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 237 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-13 22:12:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2024-10-13 22:12:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 230. [2024-10-13 22:12:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.2008733624454149) internal successors, (275), 229 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2024-10-13 22:12:16,380 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 34 [2024-10-13 22:12:16,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:16,380 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2024-10-13 22:12:16,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 29 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) [2024-10-13 22:12:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2024-10-13 22:12:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-13 22:12:16,381 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:16,381 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:16,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 22:12:16,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:16,582 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:16,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1436227439, now seen corresponding path program 1 times [2024-10-13 22:12:16,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:16,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444927665] [2024-10-13 22:12:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:16,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:16,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:16,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444927665] [2024-10-13 22:12:16,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444927665] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:16,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590769384] [2024-10-13 22:12:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:16,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:16,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:16,877 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:16,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 22:12:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:16,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 22:12:16,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:17,012 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 11 treesize of output 7 [2024-10-13 22:12:17,034 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 23 treesize of output 11 [2024-10-13 22:12:17,046 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 23 treesize of output 11 [2024-10-13 22:12:17,054 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 23 treesize of output 11 [2024-10-13 22:12:17,079 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 19 treesize of output 18 [2024-10-13 22:12:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 22:12:17,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:17,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-13 22:12:17,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-13 22:12:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-13 22:12:17,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590769384] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:17,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:17,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 23 [2024-10-13 22:12:17,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601291545] [2024-10-13 22:12:17,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:17,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 22:12:17,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:17,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 22:12:17,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-10-13 22:12:17,261 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 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) [2024-10-13 22:12:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:18,351 INFO L93 Difference]: Finished difference Result 490 states and 567 transitions. [2024-10-13 22:12:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-10-13 22:12:18,351 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 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) Word has length 34 [2024-10-13 22:12:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:18,353 INFO L225 Difference]: With dead ends: 490 [2024-10-13 22:12:18,353 INFO L226 Difference]: Without dead ends: 466 [2024-10-13 22:12:18,354 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=572, Invalid=2290, Unknown=0, NotChecked=0, Total=2862 [2024-10-13 22:12:18,354 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 264 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:18,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 161 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-13 22:12:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2024-10-13 22:12:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 311. [2024-10-13 22:12:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.1806451612903226) internal successors, (366), 310 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 366 transitions. [2024-10-13 22:12:18,390 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 366 transitions. Word has length 34 [2024-10-13 22:12:18,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:18,390 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 366 transitions. [2024-10-13 22:12:18,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 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) [2024-10-13 22:12:18,390 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 366 transitions. [2024-10-13 22:12:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-13 22:12:18,391 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:18,391 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:18,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-13 22:12:18,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 22:12:18,596 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:18,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:18,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2130623172, now seen corresponding path program 1 times [2024-10-13 22:12:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:18,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407950440] [2024-10-13 22:12:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:18,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-13 22:12:18,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:18,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407950440] [2024-10-13 22:12:18,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407950440] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:18,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:18,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:12:18,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381385994] [2024-10-13 22:12:18,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:18,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:12:18,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:12:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:12:18,635 INFO L87 Difference]: Start difference. First operand 311 states and 366 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:18,722 INFO L93 Difference]: Finished difference Result 556 states and 650 transitions. [2024-10-13 22:12:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:12:18,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-13 22:12:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:18,724 INFO L225 Difference]: With dead ends: 556 [2024-10-13 22:12:18,724 INFO L226 Difference]: Without dead ends: 401 [2024-10-13 22:12:18,725 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 [2024-10-13 22:12:18,725 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:18,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2024-10-13 22:12:18,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 322. [2024-10-13 22:12:18,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.1682242990654206) internal successors, (375), 321 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 375 transitions. [2024-10-13 22:12:18,778 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 375 transitions. Word has length 36 [2024-10-13 22:12:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:18,779 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 375 transitions. [2024-10-13 22:12:18,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 375 transitions. [2024-10-13 22:12:18,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-13 22:12:18,780 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:18,780 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:18,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-13 22:12:18,780 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:18,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:18,781 INFO L85 PathProgramCache]: Analyzing trace with hash 444504773, now seen corresponding path program 1 times [2024-10-13 22:12:18,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:18,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426495785] [2024-10-13 22:12:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:18,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:19,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:19,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426495785] [2024-10-13 22:12:19,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426495785] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:19,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892691689] [2024-10-13 22:12:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:19,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:19,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:19,088 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:19,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 22:12:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:19,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-13 22:12:19,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:19,229 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 11 treesize of output 7 [2024-10-13 22:12:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:19,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:19,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-13 22:12:19,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 22:12:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:19,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892691689] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:19,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:19,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 22 [2024-10-13 22:12:19,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637970120] [2024-10-13 22:12:19,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:19,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 22:12:19,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:19,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 22:12:19,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-10-13 22:12:19,533 INFO L87 Difference]: Start difference. First operand 322 states and 375 transitions. Second operand has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:21,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:21,030 INFO L93 Difference]: Finished difference Result 776 states and 916 transitions. [2024-10-13 22:12:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-10-13 22:12:21,030 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-13 22:12:21,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:21,033 INFO L225 Difference]: With dead ends: 776 [2024-10-13 22:12:21,033 INFO L226 Difference]: Without dead ends: 774 [2024-10-13 22:12:21,034 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=562, Invalid=3598, Unknown=0, NotChecked=0, Total=4160 [2024-10-13 22:12:21,035 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 91 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:21,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 174 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1901 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-13 22:12:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2024-10-13 22:12:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 423. [2024-10-13 22:12:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.1848341232227488) internal successors, (500), 422 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 500 transitions. [2024-10-13 22:12:21,100 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 500 transitions. Word has length 39 [2024-10-13 22:12:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:21,100 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 500 transitions. [2024-10-13 22:12:21,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 22 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 500 transitions. [2024-10-13 22:12:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-13 22:12:21,101 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:21,102 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:21,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-13 22:12:21,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:21,306 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:21,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:21,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1600183616, now seen corresponding path program 1 times [2024-10-13 22:12:21,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:21,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746776781] [2024-10-13 22:12:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:21,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-13 22:12:21,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:21,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746776781] [2024-10-13 22:12:21,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746776781] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:21,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:21,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:12:21,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035007867] [2024-10-13 22:12:21,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:21,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:12:21,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:12:21,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:12:21,350 INFO L87 Difference]: Start difference. First operand 423 states and 500 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:21,412 INFO L93 Difference]: Finished difference Result 461 states and 542 transitions. [2024-10-13 22:12:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:12:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-10-13 22:12:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:21,414 INFO L225 Difference]: With dead ends: 461 [2024-10-13 22:12:21,414 INFO L226 Difference]: Without dead ends: 340 [2024-10-13 22:12:21,414 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 [2024-10-13 22:12:21,415 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:21,415 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-10-13 22:12:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 326. [2024-10-13 22:12:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.1753846153846155) internal successors, (382), 325 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 382 transitions. [2024-10-13 22:12:21,456 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 382 transitions. Word has length 41 [2024-10-13 22:12:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:21,456 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 382 transitions. [2024-10-13 22:12:21,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:21,456 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 382 transitions. [2024-10-13 22:12:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-13 22:12:21,457 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:21,457 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:21,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-13 22:12:21,457 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:21,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:21,457 INFO L85 PathProgramCache]: Analyzing trace with hash -455185243, now seen corresponding path program 2 times [2024-10-13 22:12:21,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:21,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252622254] [2024-10-13 22:12:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:21,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-13 22:12:21,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:21,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252622254] [2024-10-13 22:12:21,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252622254] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:12:21,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:12:21,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:12:21,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764209907] [2024-10-13 22:12:21,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:12:21,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:12:21,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:12:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:12:21,512 INFO L87 Difference]: Start difference. First operand 326 states and 382 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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) [2024-10-13 22:12:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:21,575 INFO L93 Difference]: Finished difference Result 400 states and 462 transitions. [2024-10-13 22:12:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:12:21,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-10-13 22:12:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:21,577 INFO L225 Difference]: With dead ends: 400 [2024-10-13 22:12:21,577 INFO L226 Difference]: Without dead ends: 298 [2024-10-13 22:12:21,577 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 [2024-10-13 22:12:21,578 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:21,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 48 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:12:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-10-13 22:12:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 262. [2024-10-13 22:12:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.1647509578544062) internal successors, (304), 261 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 304 transitions. [2024-10-13 22:12:21,616 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 304 transitions. Word has length 43 [2024-10-13 22:12:21,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:21,616 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 304 transitions. [2024-10-13 22:12:21,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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) [2024-10-13 22:12:21,616 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 304 transitions. [2024-10-13 22:12:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-13 22:12:21,617 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:21,617 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:21,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-13 22:12:21,617 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:21,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:21,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1814654995, now seen corresponding path program 4 times [2024-10-13 22:12:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:21,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657543271] [2024-10-13 22:12:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:21,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 49 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:21,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:21,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657543271] [2024-10-13 22:12:21,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657543271] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:21,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441679131] [2024-10-13 22:12:21,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:12:21,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:21,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:21,917 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:21,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 22:12:22,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:12:22,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:22,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 22:12:22,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 70 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:22,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 70 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:22,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441679131] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:22,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:22,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2024-10-13 22:12:22,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272684811] [2024-10-13 22:12:22,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:22,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-13 22:12:22,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-13 22:12:22,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2024-10-13 22:12:22,622 INFO L87 Difference]: Start difference. First operand 262 states and 304 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) [2024-10-13 22:12:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:22,957 INFO L93 Difference]: Finished difference Result 458 states and 513 transitions. [2024-10-13 22:12:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-13 22:12:22,958 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 44 [2024-10-13 22:12:22,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:22,959 INFO L225 Difference]: With dead ends: 458 [2024-10-13 22:12:22,959 INFO L226 Difference]: Without dead ends: 333 [2024-10-13 22:12:22,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=476, Invalid=1504, Unknown=0, NotChecked=0, Total=1980 [2024-10-13 22:12:22,961 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 325 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:22,961 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 142 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-13 22:12:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-10-13 22:12:23,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 281. [2024-10-13 22:12:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1464285714285714) internal successors, (321), 280 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 321 transitions. [2024-10-13 22:12:23,003 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 321 transitions. Word has length 44 [2024-10-13 22:12:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:23,004 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 321 transitions. [2024-10-13 22:12:23,004 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) [2024-10-13 22:12:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 321 transitions. [2024-10-13 22:12:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-13 22:12:23,005 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:23,005 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:23,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-13 22:12:23,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-13 22:12:23,205 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:23,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:23,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2064059908, now seen corresponding path program 5 times [2024-10-13 22:12:23,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:23,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349392081] [2024-10-13 22:12:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:23,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:23,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:23,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349392081] [2024-10-13 22:12:23,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349392081] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:23,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738722036] [2024-10-13 22:12:23,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 22:12:23,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:23,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:23,786 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:23,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 22:12:23,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-13 22:12:23,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:23,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-13 22:12:23,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:23,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:24,025 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 23 treesize of output 11 [2024-10-13 22:12:24,031 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 23 treesize of output 11 [2024-10-13 22:12:24,042 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 23 treesize of output 11 [2024-10-13 22:12:24,051 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 23 treesize of output 11 [2024-10-13 22:12:24,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 22:12:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:24,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:24,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-13 22:12:24,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-13 22:12:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 10 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738722036] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:24,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:24,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 37 [2024-10-13 22:12:24,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377607755] [2024-10-13 22:12:24,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:24,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-13 22:12:24,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:24,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-13 22:12:24,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2024-10-13 22:12:24,560 INFO L87 Difference]: Start difference. First operand 281 states and 321 transitions. Second operand has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 37 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:27,066 INFO L93 Difference]: Finished difference Result 514 states and 577 transitions. [2024-10-13 22:12:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-10-13 22:12:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 37 states have internal predecessors, (143), 0 states have call successors, (0), 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 51 [2024-10-13 22:12:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:27,068 INFO L225 Difference]: With dead ends: 514 [2024-10-13 22:12:27,068 INFO L226 Difference]: Without dead ends: 472 [2024-10-13 22:12:27,071 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1205, Invalid=8895, Unknown=0, NotChecked=0, Total=10100 [2024-10-13 22:12:27,071 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 364 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:27,072 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 356 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-13 22:12:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2024-10-13 22:12:27,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 318. [2024-10-13 22:12:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.1293375394321767) internal successors, (358), 317 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 358 transitions. [2024-10-13 22:12:27,134 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 358 transitions. Word has length 51 [2024-10-13 22:12:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:27,134 INFO L471 AbstractCegarLoop]: Abstraction has 318 states and 358 transitions. [2024-10-13 22:12:27,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 37 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:27,135 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 358 transitions. [2024-10-13 22:12:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-13 22:12:27,135 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:27,136 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:27,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-13 22:12:27,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-13 22:12:27,336 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:27,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:27,337 INFO L85 PathProgramCache]: Analyzing trace with hash 53924988, now seen corresponding path program 2 times [2024-10-13 22:12:27,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:27,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729120189] [2024-10-13 22:12:27,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:27,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:27,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:27,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729120189] [2024-10-13 22:12:27,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729120189] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:27,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544229427] [2024-10-13 22:12:27,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:12:27,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:27,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:27,754 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:27,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 22:12:27,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:12:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:27,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-13 22:12:27,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:27,934 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 11 treesize of output 7 [2024-10-13 22:12:27,963 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 23 treesize of output 11 [2024-10-13 22:12:27,971 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 23 treesize of output 11 [2024-10-13 22:12:27,979 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 23 treesize of output 11 [2024-10-13 22:12:27,986 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 19 treesize of output 18 [2024-10-13 22:12:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:28,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:28,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-13 22:12:28,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 22:12:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:28,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544229427] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:28,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:28,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 15] total 31 [2024-10-13 22:12:28,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964491488] [2024-10-13 22:12:28,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:28,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-10-13 22:12:28,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:28,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-10-13 22:12:28,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2024-10-13 22:12:28,471 INFO L87 Difference]: Start difference. First operand 318 states and 358 transitions. Second operand has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:31,045 INFO L93 Difference]: Finished difference Result 782 states and 882 transitions. [2024-10-13 22:12:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-10-13 22:12:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-10-13 22:12:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:31,047 INFO L225 Difference]: With dead ends: 782 [2024-10-13 22:12:31,047 INFO L226 Difference]: Without dead ends: 780 [2024-10-13 22:12:31,050 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5439 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1567, Invalid=13685, Unknown=0, NotChecked=0, Total=15252 [2024-10-13 22:12:31,051 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 298 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 2749 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:31,051 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 368 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2749 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-13 22:12:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2024-10-13 22:12:31,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 447. [2024-10-13 22:12:31,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.1434977578475336) internal successors, (510), 446 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 510 transitions. [2024-10-13 22:12:31,117 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 510 transitions. Word has length 51 [2024-10-13 22:12:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:31,117 INFO L471 AbstractCegarLoop]: Abstraction has 447 states and 510 transitions. [2024-10-13 22:12:31,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7096774193548385) internal successors, (115), 31 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:31,117 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 510 transitions. [2024-10-13 22:12:31,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-13 22:12:31,118 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:31,118 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:31,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-13 22:12:31,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-13 22:12:31,319 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:31,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash -878212230, now seen corresponding path program 6 times [2024-10-13 22:12:31,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:31,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391780443] [2024-10-13 22:12:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:31,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:31,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:31,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391780443] [2024-10-13 22:12:31,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391780443] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:31,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632303763] [2024-10-13 22:12:31,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 22:12:31,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:31,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:31,937 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:31,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 22:12:32,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-13 22:12:32,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:32,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-13 22:12:32,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:32,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:32,233 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 23 treesize of output 11 [2024-10-13 22:12:32,242 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 23 treesize of output 11 [2024-10-13 22:12:32,251 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 23 treesize of output 11 [2024-10-13 22:12:32,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:12:32,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2024-10-13 22:12:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:32,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:32,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-13 22:12:32,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-13 22:12:33,008 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:33,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632303763] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:33,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:33,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 41 [2024-10-13 22:12:33,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145941216] [2024-10-13 22:12:33,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:33,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-13 22:12:33,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:33,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-13 22:12:33,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1494, Unknown=0, NotChecked=0, Total=1640 [2024-10-13 22:12:33,011 INFO L87 Difference]: Start difference. First operand 447 states and 510 transitions. Second operand has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 41 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:38,880 INFO L93 Difference]: Finished difference Result 1201 states and 1386 transitions. [2024-10-13 22:12:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-10-13 22:12:38,880 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 41 states have internal predecessors, (158), 0 states have call successors, (0), 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 56 [2024-10-13 22:12:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:38,884 INFO L225 Difference]: With dead ends: 1201 [2024-10-13 22:12:38,884 INFO L226 Difference]: Without dead ends: 1037 [2024-10-13 22:12:38,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9413 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3144, Invalid=26268, Unknown=0, NotChecked=0, Total=29412 [2024-10-13 22:12:38,887 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 845 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 2612 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 3577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 2612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:38,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 574 Invalid, 3577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 2612 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-13 22:12:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2024-10-13 22:12:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 626. [2024-10-13 22:12:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 1.1312) internal successors, (707), 625 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 707 transitions. [2024-10-13 22:12:38,992 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 707 transitions. Word has length 56 [2024-10-13 22:12:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:38,992 INFO L471 AbstractCegarLoop]: Abstraction has 626 states and 707 transitions. [2024-10-13 22:12:38,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.8536585365853657) internal successors, (158), 41 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 707 transitions. [2024-10-13 22:12:38,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-13 22:12:38,994 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:38,994 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:39,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 22:12:39,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-13 22:12:39,199 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:39,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:39,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1917804484, now seen corresponding path program 2 times [2024-10-13 22:12:39,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:39,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810767552] [2024-10-13 22:12:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:39,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:39,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:39,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810767552] [2024-10-13 22:12:39,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810767552] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:39,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875582562] [2024-10-13 22:12:39,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:12:39,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:39,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:39,622 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:39,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 22:12:39,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:12:39,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:39,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-13 22:12:39,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:39,823 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 11 treesize of output 7 [2024-10-13 22:12:39,843 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 23 treesize of output 11 [2024-10-13 22:12:39,847 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 23 treesize of output 11 [2024-10-13 22:12:39,853 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 19 treesize of output 18 [2024-10-13 22:12:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:40,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:40,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-13 22:12:40,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 22:12:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:40,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875582562] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:40,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:40,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 16] total 33 [2024-10-13 22:12:40,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720756849] [2024-10-13 22:12:40,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:40,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-13 22:12:40,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-13 22:12:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2024-10-13 22:12:40,341 INFO L87 Difference]: Start difference. First operand 626 states and 707 transitions. Second operand has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:42,745 INFO L93 Difference]: Finished difference Result 904 states and 1013 transitions. [2024-10-13 22:12:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-10-13 22:12:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 0 states have call successors, (0), 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 56 [2024-10-13 22:12:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:42,747 INFO L225 Difference]: With dead ends: 904 [2024-10-13 22:12:42,747 INFO L226 Difference]: Without dead ends: 902 [2024-10-13 22:12:42,748 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4052 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1363, Invalid=10627, Unknown=0, NotChecked=0, Total=11990 [2024-10-13 22:12:42,749 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 277 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:42,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 292 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-10-13 22:12:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2024-10-13 22:12:42,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 624. [2024-10-13 22:12:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 1.130016051364366) internal successors, (704), 623 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 704 transitions. [2024-10-13 22:12:42,848 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 704 transitions. Word has length 56 [2024-10-13 22:12:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:42,848 INFO L471 AbstractCegarLoop]: Abstraction has 624 states and 704 transitions. [2024-10-13 22:12:42,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.757575757575758) internal successors, (124), 33 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 704 transitions. [2024-10-13 22:12:42,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-13 22:12:42,849 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:42,849 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:42,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-13 22:12:43,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:43,050 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:43,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:43,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1848848572, now seen corresponding path program 7 times [2024-10-13 22:12:43,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:43,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146700552] [2024-10-13 22:12:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:43,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 14 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:43,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:43,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146700552] [2024-10-13 22:12:43,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146700552] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:43,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000612761] [2024-10-13 22:12:43,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 22:12:43,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:43,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:43,501 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:43,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 22:12:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:43,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 22:12:43,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:43,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:43,805 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 23 treesize of output 11 [2024-10-13 22:12:43,814 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 23 treesize of output 11 [2024-10-13 22:12:44,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-13 22:12:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 14 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:44,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:44,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-13 22:12:44,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-13 22:12:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 14 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:44,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000612761] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:44,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:44,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 44 [2024-10-13 22:12:44,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195873332] [2024-10-13 22:12:44,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:44,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-13 22:12:44,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:44,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-13 22:12:44,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2024-10-13 22:12:44,558 INFO L87 Difference]: Start difference. First operand 624 states and 704 transitions. Second operand has 44 states, 44 states have (on average 3.9318181818181817) internal successors, (173), 44 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:51,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:51,142 INFO L93 Difference]: Finished difference Result 1152 states and 1308 transitions. [2024-10-13 22:12:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-10-13 22:12:51,143 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.9318181818181817) internal successors, (173), 44 states have internal predecessors, (173), 0 states have call successors, (0), 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 [2024-10-13 22:12:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:51,145 INFO L225 Difference]: With dead ends: 1152 [2024-10-13 22:12:51,145 INFO L226 Difference]: Without dead ends: 1119 [2024-10-13 22:12:51,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8905 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2973, Invalid=26783, Unknown=0, NotChecked=0, Total=29756 [2024-10-13 22:12:51,147 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 867 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 3195 mSolverCounterSat, 1145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 4340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1145 IncrementalHoareTripleChecker+Valid, 3195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:51,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 663 Invalid, 4340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1145 Valid, 3195 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-10-13 22:12:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2024-10-13 22:12:51,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 657. [2024-10-13 22:12:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 1.125) internal successors, (738), 656 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 738 transitions. [2024-10-13 22:12:51,247 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 738 transitions. Word has length 61 [2024-10-13 22:12:51,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:51,247 INFO L471 AbstractCegarLoop]: Abstraction has 657 states and 738 transitions. [2024-10-13 22:12:51,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.9318181818181817) internal successors, (173), 44 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 738 transitions. [2024-10-13 22:12:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-13 22:12:51,249 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:51,249 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:51,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-13 22:12:51,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-13 22:12:51,450 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:51,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2094578822, now seen corresponding path program 1 times [2024-10-13 22:12:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:51,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160189865] [2024-10-13 22:12:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:51,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:51,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:51,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160189865] [2024-10-13 22:12:51,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160189865] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:51,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364134504] [2024-10-13 22:12:51,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:51,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:51,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:51,867 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:51,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 22:12:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:51,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-13 22:12:51,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:52,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:52,135 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 19 treesize of output 18 [2024-10-13 22:12:52,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:12:52,170 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 30 treesize of output 21 [2024-10-13 22:12:52,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:12:52,183 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 [2024-10-13 22:12:52,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:12:52,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2024-10-13 22:12:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 44 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 22:12:52,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:52,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-13 22:12:52,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-10-13 22:12:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 44 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 22:12:53,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364134504] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:53,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:53,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 43 [2024-10-13 22:12:53,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980466535] [2024-10-13 22:12:53,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:53,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-13 22:12:53,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-13 22:12:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2024-10-13 22:12:53,046 INFO L87 Difference]: Start difference. First operand 657 states and 738 transitions. Second operand has 43 states, 43 states have (on average 3.953488372093023) internal successors, (170), 43 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:12:56,566 INFO L93 Difference]: Finished difference Result 916 states and 1025 transitions. [2024-10-13 22:12:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-10-13 22:12:56,566 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.953488372093023) internal successors, (170), 43 states have internal predecessors, (170), 0 states have call successors, (0), 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 [2024-10-13 22:12:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:12:56,568 INFO L225 Difference]: With dead ends: 916 [2024-10-13 22:12:56,568 INFO L226 Difference]: Without dead ends: 888 [2024-10-13 22:12:56,570 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4929 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1735, Invalid=14015, Unknown=0, NotChecked=0, Total=15750 [2024-10-13 22:12:56,570 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 300 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 3738 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 4418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 3738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-10-13 22:12:56,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 471 Invalid, 4418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 3738 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-10-13 22:12:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2024-10-13 22:12:56,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 667. [2024-10-13 22:12:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 1.1216216216216217) internal successors, (747), 666 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 747 transitions. [2024-10-13 22:12:56,677 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 747 transitions. Word has length 61 [2024-10-13 22:12:56,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:12:56,678 INFO L471 AbstractCegarLoop]: Abstraction has 667 states and 747 transitions. [2024-10-13 22:12:56,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.953488372093023) internal successors, (170), 43 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:12:56,678 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 747 transitions. [2024-10-13 22:12:56,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-13 22:12:56,679 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:12:56,679 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:12:56,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-13 22:12:56,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-13 22:12:56,880 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:12:56,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:12:56,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1429830470, now seen corresponding path program 8 times [2024-10-13 22:12:56,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:12:56,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576431866] [2024-10-13 22:12:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:12:56,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:12:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:12:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 16 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:57,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:12:57,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576431866] [2024-10-13 22:12:57,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576431866] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:12:57,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564432544] [2024-10-13 22:12:57,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:12:57,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:12:57,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:12:57,410 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:12:57,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 22:12:57,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:12:57,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:12:57,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-13 22:12:57,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:12:57,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 22:12:57,747 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 23 treesize of output 11 [2024-10-13 22:12:58,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 22:12:58,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2024-10-13 22:12:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 16 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:58,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:12:58,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-13 22:12:58,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-13 22:12:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 16 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:12:58,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564432544] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:12:58,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:12:58,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 48 [2024-10-13 22:12:58,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624560218] [2024-10-13 22:12:58,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:12:58,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-13 22:12:58,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:12:58,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-13 22:12:58,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2079, Unknown=0, NotChecked=0, Total=2256 [2024-10-13 22:12:58,730 INFO L87 Difference]: Start difference. First operand 667 states and 747 transitions. Second operand has 48 states, 48 states have (on average 3.9166666666666665) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:13:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:13:04,219 INFO L93 Difference]: Finished difference Result 1109 states and 1253 transitions. [2024-10-13 22:13:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-10-13 22:13:04,220 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9166666666666665) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 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 66 [2024-10-13 22:13:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:13:04,222 INFO L225 Difference]: With dead ends: 1109 [2024-10-13 22:13:04,222 INFO L226 Difference]: Without dead ends: 1085 [2024-10-13 22:13:04,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7114 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2489, Invalid=21691, Unknown=0, NotChecked=0, Total=24180 [2024-10-13 22:13:04,223 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 592 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 2792 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 3621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 2792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-10-13 22:13:04,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 591 Invalid, 3621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 2792 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-10-13 22:13:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2024-10-13 22:13:04,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 715. [2024-10-13 22:13:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.119047619047619) internal successors, (799), 714 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:13:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 799 transitions. [2024-10-13 22:13:04,357 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 799 transitions. Word has length 66 [2024-10-13 22:13:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:13:04,357 INFO L471 AbstractCegarLoop]: Abstraction has 715 states and 799 transitions. [2024-10-13 22:13:04,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9166666666666665) internal successors, (188), 48 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:13:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 799 transitions. [2024-10-13 22:13:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-13 22:13:04,359 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:13:04,359 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:13:04,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-13 22:13:04,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:04,560 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:13:04,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:13:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash -642297286, now seen corresponding path program 3 times [2024-10-13 22:13:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:13:04,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839829364] [2024-10-13 22:13:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:13:04,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:13:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:13:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:04,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:13:04,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839829364] [2024-10-13 22:13:04,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839829364] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:13:04,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653208870] [2024-10-13 22:13:04,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:13:04,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:04,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:13:04,994 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:13:04,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 22:13:05,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-13 22:13:05,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:13:05,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-13 22:13:05,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:13:05,275 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 13 treesize of output 9 [2024-10-13 22:13:05,280 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 23 treesize of output 22 [2024-10-13 22:13:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:05,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:13:05,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-13 22:13:05,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 22:13:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:05,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653208870] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:13:05,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:13:05,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 29 [2024-10-13 22:13:05,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174227941] [2024-10-13 22:13:05,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:13:05,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-13 22:13:05,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:13:05,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-13 22:13:05,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2024-10-13 22:13:05,717 INFO L87 Difference]: Start difference. First operand 715 states and 799 transitions. Second operand has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 29 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:13:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:13:08,967 INFO L93 Difference]: Finished difference Result 1020 states and 1134 transitions. [2024-10-13 22:13:08,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-10-13 22:13:08,967 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 29 states have internal predecessors, (123), 0 states have call successors, (0), 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 66 [2024-10-13 22:13:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:13:08,970 INFO L225 Difference]: With dead ends: 1020 [2024-10-13 22:13:08,970 INFO L226 Difference]: Without dead ends: 1018 [2024-10-13 22:13:08,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4991 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1365, Invalid=12677, Unknown=0, NotChecked=0, Total=14042 [2024-10-13 22:13:08,971 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 3781 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 4309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 3781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-10-13 22:13:08,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 269 Invalid, 4309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 3781 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-10-13 22:13:08,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2024-10-13 22:13:09,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 711. [2024-10-13 22:13:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.1169014084507043) internal successors, (793), 710 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:13:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 793 transitions. [2024-10-13 22:13:09,105 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 793 transitions. Word has length 66 [2024-10-13 22:13:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:13:09,106 INFO L471 AbstractCegarLoop]: Abstraction has 711 states and 793 transitions. [2024-10-13 22:13:09,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 29 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:13:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 793 transitions. [2024-10-13 22:13:09,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-10-13 22:13:09,107 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:13:09,108 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:13:09,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-13 22:13:09,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:09,312 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:13:09,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:13:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1217469435, now seen corresponding path program 1 times [2024-10-13 22:13:09,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:13:09,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411691274] [2024-10-13 22:13:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:13:09,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:13:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:13:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-10-13 22:13:09,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:13:09,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411691274] [2024-10-13 22:13:09,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411691274] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 22:13:09,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 22:13:09,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 22:13:09,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208751438] [2024-10-13 22:13:09,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 22:13:09,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 22:13:09,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:13:09,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 22:13:09,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 22:13:09,355 INFO L87 Difference]: Start difference. First operand 711 states and 793 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 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) [2024-10-13 22:13:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:13:09,458 INFO L93 Difference]: Finished difference Result 880 states and 979 transitions. [2024-10-13 22:13:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 22:13:09,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-10-13 22:13:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:13:09,460 INFO L225 Difference]: With dead ends: 880 [2024-10-13 22:13:09,460 INFO L226 Difference]: Without dead ends: 497 [2024-10-13 22:13:09,461 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 [2024-10-13 22:13:09,461 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-13 22:13:09,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 45 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-13 22:13:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2024-10-13 22:13:09,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 423. [2024-10-13 22:13:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.0900473933649288) internal successors, (460), 422 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:13:09,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 460 transitions. [2024-10-13 22:13:09,537 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 460 transitions. Word has length 67 [2024-10-13 22:13:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:13:09,537 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 460 transitions. [2024-10-13 22:13:09,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 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) [2024-10-13 22:13:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 460 transitions. [2024-10-13 22:13:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-10-13 22:13:09,539 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:13:09,539 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:13:09,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-10-13 22:13:09,539 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:13:09,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:13:09,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1323318716, now seen corresponding path program 2 times [2024-10-13 22:13:09,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:13:09,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030814848] [2024-10-13 22:13:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:13:09,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:13:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:13:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:09,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:13:09,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030814848] [2024-10-13 22:13:09,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030814848] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:13:09,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048752904] [2024-10-13 22:13:09,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 22:13:09,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:09,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:13:09,930 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:13:09,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-13 22:13:10,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 22:13:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:13:10,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-13 22:13:10,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:13:10,128 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 11 treesize of output 7 [2024-10-13 22:13:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:10,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:13:10,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-10-13 22:13:10,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-10-13 22:13:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:10,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048752904] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:13:10,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:13:10,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 19] total 38 [2024-10-13 22:13:10,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769878850] [2024-10-13 22:13:10,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:13:10,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-13 22:13:10,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:13:10,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-13 22:13:10,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2024-10-13 22:13:10,704 INFO L87 Difference]: Start difference. First operand 423 states and 460 transitions. Second operand has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:13:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:13:15,926 INFO L93 Difference]: Finished difference Result 950 states and 1047 transitions. [2024-10-13 22:13:15,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-10-13 22:13:15,927 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 0 states have call successors, (0), 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 71 [2024-10-13 22:13:15,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:13:15,929 INFO L225 Difference]: With dead ends: 950 [2024-10-13 22:13:15,929 INFO L226 Difference]: Without dead ends: 948 [2024-10-13 22:13:15,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7871 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1783, Invalid=20867, Unknown=0, NotChecked=0, Total=22650 [2024-10-13 22:13:15,931 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 213 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 7564 mSolverCounterSat, 801 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 8365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 801 IncrementalHoareTripleChecker+Valid, 7564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-10-13 22:13:15,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 369 Invalid, 8365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [801 Valid, 7564 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-10-13 22:13:15,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2024-10-13 22:13:16,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 428. [2024-10-13 22:13:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.088992974238876) internal successors, (465), 427 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:13:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 465 transitions. [2024-10-13 22:13:16,045 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 465 transitions. Word has length 71 [2024-10-13 22:13:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:13:16,046 INFO L471 AbstractCegarLoop]: Abstraction has 428 states and 465 transitions. [2024-10-13 22:13:16,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 38 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:13:16,046 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 465 transitions. [2024-10-13 22:13:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-10-13 22:13:16,047 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:13:16,047 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:13:16,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-13 22:13:16,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:16,248 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:13:16,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:13:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1735323130, now seen corresponding path program 9 times [2024-10-13 22:13:16,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:13:16,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533798098] [2024-10-13 22:13:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:13:16,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:13:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:13:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 219 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:16,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:13:16,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533798098] [2024-10-13 22:13:16,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533798098] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:13:16,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853388961] [2024-10-13 22:13:16,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 22:13:16,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:16,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:13:16,700 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:13:16,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-13 22:13:16,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-13 22:13:16,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:13:16,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 22:13:16,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:13:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 265 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:17,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:13:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 265 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:17,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853388961] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:13:17,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:13:17,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 52 [2024-10-13 22:13:17,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367895889] [2024-10-13 22:13:17,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:13:17,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-10-13 22:13:17,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:13:17,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-10-13 22:13:17,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2024-10-13 22:13:17,964 INFO L87 Difference]: Start difference. First operand 428 states and 465 transitions. Second operand has 52 states, 52 states have (on average 4.1923076923076925) internal successors, (218), 52 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) [2024-10-13 22:13:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-13 22:13:18,389 INFO L93 Difference]: Finished difference Result 869 states and 936 transitions. [2024-10-13 22:13:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 22:13:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.1923076923076925) internal successors, (218), 52 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 76 [2024-10-13 22:13:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-13 22:13:18,391 INFO L225 Difference]: With dead ends: 869 [2024-10-13 22:13:18,391 INFO L226 Difference]: Without dead ends: 532 [2024-10-13 22:13:18,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=807, Invalid=2499, Unknown=0, NotChecked=0, Total=3306 [2024-10-13 22:13:18,392 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 341 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-13 22:13:18,392 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 271 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-13 22:13:18,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2024-10-13 22:13:18,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 484. [2024-10-13 22:13:18,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.0786749482401656) internal successors, (521), 483 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 22:13:18,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 521 transitions. [2024-10-13 22:13:18,481 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 521 transitions. Word has length 76 [2024-10-13 22:13:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-13 22:13:18,481 INFO L471 AbstractCegarLoop]: Abstraction has 484 states and 521 transitions. [2024-10-13 22:13:18,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.1923076923076925) internal successors, (218), 52 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) [2024-10-13 22:13:18,481 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 521 transitions. [2024-10-13 22:13:18,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-10-13 22:13:18,482 INFO L207 NwaCegarLoop]: Found error trace [2024-10-13 22:13:18,482 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 22:13:18,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-13 22:13:18,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-10-13 22:13:18,686 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 22:13:18,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 22:13:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1017869341, now seen corresponding path program 10 times [2024-10-13 22:13:18,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 22:13:18,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439162356] [2024-10-13 22:13:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 22:13:18,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 22:13:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 22:13:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 20 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:19,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 22:13:19,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439162356] [2024-10-13 22:13:19,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439162356] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 22:13:19,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206609611] [2024-10-13 22:13:19,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 22:13:19,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 22:13:19,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 22:13:19,490 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 22:13:19,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-13 22:13:19,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 22:13:19,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 22:13:19,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-10-13 22:13:19,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 22:13:19,832 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 11 treesize of output 7 [2024-10-13 22:13:19,863 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 23 treesize of output 11 [2024-10-13 22:13:19,873 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 23 treesize of output 11 [2024-10-13 22:13:19,882 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 23 treesize of output 11 [2024-10-13 22:13:19,891 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 23 treesize of output 11 [2024-10-13 22:13:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 20 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:20,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 22:13:21,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-10-13 22:13:21,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-13 22:13:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 20 proven. 269 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 22:13:21,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206609611] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 22:13:21,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 22:13:21,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 58 [2024-10-13 22:13:21,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476343355] [2024-10-13 22:13:21,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 22:13:21,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-13 22:13:21,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 22:13:21,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-13 22:13:21,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3068, Unknown=0, NotChecked=0, Total=3306 [2024-10-13 22:13:21,247 INFO L87 Difference]: Start difference. First operand 484 states and 521 transitions. Second operand has 58 states, 58 states have (on average 4.137931034482759) internal successors, (240), 58 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)