./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/pr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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/pr2.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 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:43:03,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:43:03,945 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:43:03,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:43:03,949 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:43:03,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:43:03,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:43:03,971 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:43:03,971 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:43:03,973 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:43:03,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:43:03,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:43:03,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:43:03,976 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:43:03,976 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:43:03,977 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:43:03,977 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:43:03,977 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:43:03,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:43:03,977 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:43:03,978 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:43:03,980 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:43:03,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:43:03,981 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:43:03,981 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:43:03,981 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:43:03,981 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:43:03,981 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:43:03,982 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:43:03,982 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:43:03,982 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:43:03,982 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:43:03,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:43:03,983 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:43:03,983 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:43:03,983 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:43:03,983 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:43:03,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:43:03,984 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:43:03,984 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:43:03,984 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:43:03,986 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:43:03,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2024-10-12 14:43:04,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:43:04,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:43:04,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:43:04,307 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:43:04,307 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:43:04,308 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr2.c [2024-10-12 14:43:05,734 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:43:05,926 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:43:05,927 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr2.c [2024-10-12 14:43:05,933 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560f121d4/b7f7aed5ec644883b1a1a47783f682b0/FLAG249dcbf1e [2024-10-12 14:43:05,949 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560f121d4/b7f7aed5ec644883b1a1a47783f682b0 [2024-10-12 14:43:05,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:43:05,952 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:43:05,953 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:43:05,953 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:43:05,959 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:43:05,959 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:43:05" (1/1) ... [2024-10-12 14:43:05,960 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f5d4eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:05, skipping insertion in model container [2024-10-12 14:43:05,960 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:43:05" (1/1) ... [2024-10-12 14:43:05,979 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:43:06,133 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/pr2.c[394,407] [2024-10-12 14:43:06,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:43:06,169 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:43:06,180 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/pr2.c[394,407] [2024-10-12 14:43:06,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:43:06,206 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:43:06,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06 WrapperNode [2024-10-12 14:43:06,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:43:06,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:43:06,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:43:06,208 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:43:06,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,219 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,244 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-10-12 14:43:06,245 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:43:06,245 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:43:06,246 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:43:06,246 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:43:06,255 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,257 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,274 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 6, 6]. 43 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 0, 6]. The 4 writes are split as follows [0, 4, 0]. [2024-10-12 14:43:06,274 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,275 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,279 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,285 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,286 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,287 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,289 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:43:06,290 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:43:06,290 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:43:06,290 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:43:06,291 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (1/1) ... [2024-10-12 14:43:06,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:43:06,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:06,338 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) [2024-10-12 14:43:06,341 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 [2024-10-12 14:43:06,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:43:06,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:43:06,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:43:06,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 14:43:06,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 14:43:06,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:43:06,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:43:06,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 14:43:06,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:43:06,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:43:06,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:43:06,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:43:06,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 14:43:06,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 14:43:06,495 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:43:06,497 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:43:06,727 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-12 14:43:06,727 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:43:06,759 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:43:06,760 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-12 14:43:06,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:43:06 BoogieIcfgContainer [2024-10-12 14:43:06,760 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:43:06,762 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:43:06,762 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:43:06,765 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:43:06,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:43:05" (1/3) ... [2024-10-12 14:43:06,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49450a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:43:06, skipping insertion in model container [2024-10-12 14:43:06,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:43:06" (2/3) ... [2024-10-12 14:43:06,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49450a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:43:06, skipping insertion in model container [2024-10-12 14:43:06,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:43:06" (3/3) ... [2024-10-12 14:43:06,769 INFO L112 eAbstractionObserver]: Analyzing ICFG pr2.c [2024-10-12 14:43:06,782 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:43:06,783 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:43:06,846 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:43:06,852 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;@37add537, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:43:06,853 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:43:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 14:43:06,862 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:06,862 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:06,863 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:06,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:06,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1365372683, now seen corresponding path program 1 times [2024-10-12 14:43:06,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:06,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737695110] [2024-10-12 14:43:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:06,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:07,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:07,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737695110] [2024-10-12 14:43:07,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737695110] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:43:07,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:43:07,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:43:07,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696625973] [2024-10-12 14:43:07,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:43:07,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-12 14:43:07,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:07,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-12 14:43:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-12 14:43:07,073 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 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) [2024-10-12 14:43:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:07,096 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2024-10-12 14:43:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-12 14:43:07,101 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 [2024-10-12 14:43:07,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:07,108 INFO L225 Difference]: With dead ends: 38 [2024-10-12 14:43:07,109 INFO L226 Difference]: Without dead ends: 17 [2024-10-12 14:43:07,111 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 [2024-10-12 14:43:07,114 INFO L432 NwaCegarLoop]: 24 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, 24 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 [2024-10-12 14:43:07,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:43:07,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-12 14:43:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-10-12 14:43:07,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:07,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-10-12 14:43:07,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2024-10-12 14:43:07,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:07,138 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-10-12 14:43:07,139 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) [2024-10-12 14:43:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-10-12 14:43:07,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 14:43:07,139 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:07,139 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:07,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:43:07,140 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:07,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:07,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2045431053, now seen corresponding path program 1 times [2024-10-12 14:43:07,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:07,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766790296] [2024-10-12 14:43:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:07,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:07,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766790296] [2024-10-12 14:43:07,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766790296] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:43:07,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:43:07,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 14:43:07,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377257846] [2024-10-12 14:43:07,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:43:07,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:43:07,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:07,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:43:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:43:07,348 INFO L87 Difference]: Start difference. First operand 17 states and 21 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) [2024-10-12 14:43:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:07,379 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2024-10-12 14:43:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:43:07,380 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 [2024-10-12 14:43:07,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:07,381 INFO L225 Difference]: With dead ends: 21 [2024-10-12 14:43:07,381 INFO L226 Difference]: Without dead ends: 19 [2024-10-12 14:43:07,382 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 [2024-10-12 14:43:07,383 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 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 [2024-10-12 14:43:07,385 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:43:07,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-12 14:43:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-12 14:43:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-10-12 14:43:07,391 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2024-10-12 14:43:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:07,392 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-10-12 14:43:07,392 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) [2024-10-12 14:43:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-10-12 14:43:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-12 14:43:07,393 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:07,393 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:07,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 14:43:07,394 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:07,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:07,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2045490635, now seen corresponding path program 1 times [2024-10-12 14:43:07,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:07,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087221301] [2024-10-12 14:43:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:07,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:07,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:07,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087221301] [2024-10-12 14:43:07,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087221301] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:43:07,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:43:07,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-12 14:43:07,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569954888] [2024-10-12 14:43:07,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:43:07,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-12 14:43:07,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:07,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-12 14:43:07,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:43:07,707 INFO L87 Difference]: Start difference. First operand 19 states and 23 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) [2024-10-12 14:43:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:07,751 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-10-12 14:43:07,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-12 14:43:07,752 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 [2024-10-12 14:43:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:07,753 INFO L225 Difference]: With dead ends: 33 [2024-10-12 14:43:07,753 INFO L226 Difference]: Without dead ends: 23 [2024-10-12 14:43:07,753 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 [2024-10-12 14:43:07,754 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:07,755 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 16 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:43:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-12 14:43:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2024-10-12 14:43:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-12 14:43:07,761 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2024-10-12 14:43:07,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:07,761 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-12 14:43:07,761 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) [2024-10-12 14:43:07,761 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-12 14:43:07,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 14:43:07,762 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:07,762 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:07,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-12 14:43:07,764 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:07,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:07,764 INFO L85 PathProgramCache]: Analyzing trace with hash 199609668, now seen corresponding path program 1 times [2024-10-12 14:43:07,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:07,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851180614] [2024-10-12 14:43:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:08,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:08,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851180614] [2024-10-12 14:43:08,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851180614] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:08,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061316917] [2024-10-12 14:43:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:08,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:08,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:08,288 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) [2024-10-12 14:43:08,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:43:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:08,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 14:43:08,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:08,465 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 [2024-10-12 14:43:08,504 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 [2024-10-12 14:43:08,587 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 15 treesize of output 7 [2024-10-12 14:43:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:08,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:08,686 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 [2024-10-12 14:43:08,692 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 14 [2024-10-12 14:43:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:08,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061316917] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:08,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:08,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2024-10-12 14:43:08,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101095501] [2024-10-12 14:43:08,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:08,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-12 14:43:08,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:08,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-12 14:43:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-10-12 14:43:08,738 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:09,301 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2024-10-12 14:43:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-12 14:43:09,302 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-12 14:43:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:09,306 INFO L225 Difference]: With dead ends: 97 [2024-10-12 14:43:09,306 INFO L226 Difference]: Without dead ends: 83 [2024-10-12 14:43:09,308 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=275, Invalid=847, Unknown=0, NotChecked=0, Total=1122 [2024-10-12 14:43:09,309 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 218 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:09,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 95 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:43:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-10-12 14:43:09,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 33. [2024-10-12 14:43:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-10-12 14:43:09,322 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 16 [2024-10-12 14:43:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:09,323 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-10-12 14:43:09,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:09,324 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-10-12 14:43:09,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 14:43:09,325 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:09,325 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:09,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 14:43:09,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:09,526 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:09,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:09,526 INFO L85 PathProgramCache]: Analyzing trace with hash -193417342, now seen corresponding path program 1 times [2024-10-12 14:43:09,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:09,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111365744] [2024-10-12 14:43:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:09,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:09,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:09,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111365744] [2024-10-12 14:43:09,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111365744] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:43:09,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:43:09,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-12 14:43:09,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003872067] [2024-10-12 14:43:09,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:43:09,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-12 14:43:09,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:09,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-12 14:43:09,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:43:09,594 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:09,630 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2024-10-12 14:43:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-12 14:43:09,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-12 14:43:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:09,631 INFO L225 Difference]: With dead ends: 56 [2024-10-12 14:43:09,631 INFO L226 Difference]: Without dead ends: 42 [2024-10-12 14:43:09,631 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 [2024-10-12 14:43:09,632 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:09,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:43:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-12 14:43:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2024-10-12 14:43:09,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 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) [2024-10-12 14:43:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-10-12 14:43:09,643 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 16 [2024-10-12 14:43:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:09,643 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-10-12 14:43:09,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-10-12 14:43:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-12 14:43:09,645 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:09,645 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:09,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-12 14:43:09,646 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:09,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash 486641028, now seen corresponding path program 1 times [2024-10-12 14:43:09,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:09,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534286671] [2024-10-12 14:43:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:09,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:09,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:09,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534286671] [2024-10-12 14:43:09,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534286671] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:09,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63298207] [2024-10-12 14:43:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:09,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:09,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:09,898 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) [2024-10-12 14:43:09,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:43:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:09,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-12 14:43:09,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:10,016 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 [2024-10-12 14:43:10,030 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 [2024-10-12 14:43:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:10,084 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:10,139 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 [2024-10-12 14:43:10,144 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 [2024-10-12 14:43:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:10,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63298207] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:10,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:10,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 16 [2024-10-12 14:43:10,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269174119] [2024-10-12 14:43:10,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:10,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-12 14:43:10,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:10,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-12 14:43:10,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-10-12 14:43:10,159 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:10,499 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2024-10-12 14:43:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-12 14:43:10,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-10-12 14:43:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:10,501 INFO L225 Difference]: With dead ends: 69 [2024-10-12 14:43:10,501 INFO L226 Difference]: Without dead ends: 67 [2024-10-12 14:43:10,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2024-10-12 14:43:10,503 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 143 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:10,503 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 63 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:43:10,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-12 14:43:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2024-10-12 14:43:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2024-10-12 14:43:10,511 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 16 [2024-10-12 14:43:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:10,512 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2024-10-12 14:43:10,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2024-10-12 14:43:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-12 14:43:10,513 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:10,513 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:10,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 14:43:10,717 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,SelfDestructingSolverStorable5 [2024-10-12 14:43:10,718 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:10,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:10,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1237798271, now seen corresponding path program 1 times [2024-10-12 14:43:10,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:10,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836780423] [2024-10-12 14:43:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:10,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:10,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:10,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836780423] [2024-10-12 14:43:10,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836780423] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:43:10,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:43:10,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 14:43:10,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697747430] [2024-10-12 14:43:10,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:43:10,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:43:10,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:10,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:43:10,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:43:10,750 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:10,768 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2024-10-12 14:43:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:43:10,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-12 14:43:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:10,769 INFO L225 Difference]: With dead ends: 58 [2024-10-12 14:43:10,769 INFO L226 Difference]: Without dead ends: 44 [2024-10-12 14:43:10,770 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 [2024-10-12 14:43:10,770 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:10,771 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:43:10,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-12 14:43:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2024-10-12 14:43:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-10-12 14:43:10,776 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2024-10-12 14:43:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:10,777 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-10-12 14:43:10,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-10-12 14:43:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-12 14:43:10,777 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:10,778 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:10,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-12 14:43:10,778 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:10,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash -470241182, now seen corresponding path program 1 times [2024-10-12 14:43:10,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:10,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257234538] [2024-10-12 14:43:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:10,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:11,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:11,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257234538] [2024-10-12 14:43:11,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257234538] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:11,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890792393] [2024-10-12 14:43:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:11,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:11,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:11,055 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) [2024-10-12 14:43:11,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:43:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:11,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 14:43:11,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:11,168 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 [2024-10-12 14:43:11,258 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 [2024-10-12 14:43:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:11,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:11,324 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 [2024-10-12 14:43:11,326 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 18 treesize of output 14 [2024-10-12 14:43:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:11,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890792393] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:11,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:11,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-10-12 14:43:11,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97414954] [2024-10-12 14:43:11,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:11,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-12 14:43:11,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:11,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-12 14:43:11,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-12 14:43:11,345 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:11,565 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2024-10-12 14:43:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-12 14:43:11,566 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 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 21 [2024-10-12 14:43:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:11,567 INFO L225 Difference]: With dead ends: 69 [2024-10-12 14:43:11,567 INFO L226 Difference]: Without dead ends: 60 [2024-10-12 14:43:11,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2024-10-12 14:43:11,568 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:11,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 107 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:43:11,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-12 14:43:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2024-10-12 14:43:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 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) [2024-10-12 14:43:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-10-12 14:43:11,574 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 21 [2024-10-12 14:43:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:11,575 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-10-12 14:43:11,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-10-12 14:43:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-12 14:43:11,576 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:11,576 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:11,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-12 14:43:11,780 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 [2024-10-12 14:43:11,781 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:11,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:11,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1481358432, now seen corresponding path program 1 times [2024-10-12 14:43:11,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:11,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133656832] [2024-10-12 14:43:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:11,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:11,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:11,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133656832] [2024-10-12 14:43:11,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133656832] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:11,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468170779] [2024-10-12 14:43:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:11,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:11,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:11,994 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) [2024-10-12 14:43:11,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:43:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:12,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-12 14:43:12,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:12,076 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 [2024-10-12 14:43:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:12,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:12,208 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 [2024-10-12 14:43:12,211 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 [2024-10-12 14:43:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:12,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468170779] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:12,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:12,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2024-10-12 14:43:12,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678876805] [2024-10-12 14:43:12,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:12,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 14:43:12,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 14:43:12,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:43:12,227 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:12,452 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2024-10-12 14:43:12,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 14:43:12,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 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 21 [2024-10-12 14:43:12,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:12,454 INFO L225 Difference]: With dead ends: 75 [2024-10-12 14:43:12,454 INFO L226 Difference]: Without dead ends: 73 [2024-10-12 14:43:12,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2024-10-12 14:43:12,454 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:12,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 91 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:43:12,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-12 14:43:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2024-10-12 14:43:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 52 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) [2024-10-12 14:43:12,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-10-12 14:43:12,470 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 21 [2024-10-12 14:43:12,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:12,470 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-10-12 14:43:12,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-10-12 14:43:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 14:43:12,473 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:12,473 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:12,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 14:43:12,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:12,678 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:12,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:12,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2076003001, now seen corresponding path program 1 times [2024-10-12 14:43:12,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:12,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001567530] [2024-10-12 14:43:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:12,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-12 14:43:12,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:12,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001567530] [2024-10-12 14:43:12,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001567530] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:43:12,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:43:12,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 14:43:12,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797478983] [2024-10-12 14:43:12,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:43:12,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:43:12,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:12,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:43:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:43:12,708 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:12,727 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2024-10-12 14:43:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:43:12,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-12 14:43:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:12,728 INFO L225 Difference]: With dead ends: 74 [2024-10-12 14:43:12,728 INFO L226 Difference]: Without dead ends: 58 [2024-10-12 14:43:12,729 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 [2024-10-12 14:43:12,729 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:12,729 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:43:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-12 14:43:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2024-10-12 14:43:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-10-12 14:43:12,736 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 25 [2024-10-12 14:43:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:12,736 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-10-12 14:43:12,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-10-12 14:43:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-12 14:43:12,737 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:12,737 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:12,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-12 14:43:12,737 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:12,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash -697495548, now seen corresponding path program 2 times [2024-10-12 14:43:12,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:12,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979850704] [2024-10-12 14:43:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:12,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:12,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:12,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979850704] [2024-10-12 14:43:12,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979850704] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:12,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383846242] [2024-10-12 14:43:12,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:43:12,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:12,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:12,962 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) [2024-10-12 14:43:12,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:43:13,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:43:13,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:43:13,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-12 14:43:13,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:13,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:13,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383846242] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:13,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:13,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2024-10-12 14:43:13,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763276195] [2024-10-12 14:43:13,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:13,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-12 14:43:13,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-12 14:43:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2024-10-12 14:43:13,384 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:13,545 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2024-10-12 14:43:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 14:43:13,546 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-12 14:43:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:13,551 INFO L225 Difference]: With dead ends: 99 [2024-10-12 14:43:13,551 INFO L226 Difference]: Without dead ends: 67 [2024-10-12 14:43:13,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:43:13,552 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:13,553 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 74 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:43:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-12 14:43:13,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2024-10-12 14:43:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-10-12 14:43:13,567 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 26 [2024-10-12 14:43:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:13,569 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-10-12 14:43:13,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-10-12 14:43:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 14:43:13,569 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:13,570 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:13,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 14:43:13,770 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,SelfDestructingSolverStorable10 [2024-10-12 14:43:13,770 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:13,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:13,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1708646467, now seen corresponding path program 3 times [2024-10-12 14:43:13,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:13,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489189323] [2024-10-12 14:43:13,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:13,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:14,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:14,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489189323] [2024-10-12 14:43:14,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489189323] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:14,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886513091] [2024-10-12 14:43:14,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:43:14,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:14,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:14,142 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) [2024-10-12 14:43:14,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:43:14,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 14:43:14,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:43:14,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-12 14:43:14,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:14,337 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 [2024-10-12 14:43:14,373 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 [2024-10-12 14:43:14,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:43:14,612 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 [2024-10-12 14:43:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:14,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:14,751 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 [2024-10-12 14:43:14,753 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 [2024-10-12 14:43:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:14,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886513091] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:14,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:14,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2024-10-12 14:43:14,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584588384] [2024-10-12 14:43:14,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:14,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-12 14:43:14,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:14,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-12 14:43:14,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:43:14,829 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:15,726 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2024-10-12 14:43:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-12 14:43:15,727 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-10-12 14:43:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:15,727 INFO L225 Difference]: With dead ends: 124 [2024-10-12 14:43:15,727 INFO L226 Difference]: Without dead ends: 115 [2024-10-12 14:43:15,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2024-10-12 14:43:15,729 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 301 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:15,729 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 224 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 14:43:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-10-12 14:43:15,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 70. [2024-10-12 14:43:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2024-10-12 14:43:15,738 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 30 [2024-10-12 14:43:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:15,738 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2024-10-12 14:43:15,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2024-10-12 14:43:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-12 14:43:15,739 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:15,739 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:15,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 14:43:15,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:15,944 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:15,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1859723203, now seen corresponding path program 1 times [2024-10-12 14:43:15,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:15,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982557066] [2024-10-12 14:43:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:15,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:16,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:16,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982557066] [2024-10-12 14:43:16,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982557066] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:16,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046667236] [2024-10-12 14:43:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:16,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:16,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:16,180 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) [2024-10-12 14:43:16,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 14:43:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:16,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-12 14:43:16,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:16,322 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 [2024-10-12 14:43:16,367 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 22 [2024-10-12 14:43:16,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:43:16,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:43:16,408 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 42 treesize of output 25 [2024-10-12 14:43:16,647 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:43:16,648 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 26 treesize of output 10 [2024-10-12 14:43:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 14:43:16,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:16,927 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 25 treesize of output 23 [2024-10-12 14:43:16,930 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 46 treesize of output 42 [2024-10-12 14:43:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-12 14:43:17,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046667236] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:17,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:17,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 29 [2024-10-12 14:43:17,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70540987] [2024-10-12 14:43:17,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:17,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-12 14:43:17,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:17,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-12 14:43:17,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:43:17,031 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 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) [2024-10-12 14:43:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:17,907 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2024-10-12 14:43:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-12 14:43:17,907 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 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 30 [2024-10-12 14:43:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:17,908 INFO L225 Difference]: With dead ends: 115 [2024-10-12 14:43:17,908 INFO L226 Difference]: Without dead ends: 106 [2024-10-12 14:43:17,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=475, Invalid=2495, Unknown=0, NotChecked=0, Total=2970 [2024-10-12 14:43:17,910 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 148 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:17,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 166 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-12 14:43:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-12 14:43:17,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2024-10-12 14:43:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 74 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:17,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2024-10-12 14:43:17,920 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 30 [2024-10-12 14:43:17,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:17,920 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2024-10-12 14:43:17,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 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) [2024-10-12 14:43:17,921 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2024-10-12 14:43:17,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-12 14:43:17,921 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:17,921 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:17,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-12 14:43:18,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:18,122 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:18,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:18,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2072433147, now seen corresponding path program 2 times [2024-10-12 14:43:18,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:18,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264705101] [2024-10-12 14:43:18,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:18,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:18,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:18,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264705101] [2024-10-12 14:43:18,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264705101] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:18,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543481794] [2024-10-12 14:43:18,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:43:18,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:18,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:18,474 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) [2024-10-12 14:43:18,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 14:43:18,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:43:18,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:43:18,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-12 14:43:18,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:18,577 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 [2024-10-12 14:43:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:18,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:18,772 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 [2024-10-12 14:43:18,776 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 [2024-10-12 14:43:18,804 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:18,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543481794] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:18,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:18,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 20 [2024-10-12 14:43:18,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295285704] [2024-10-12 14:43:18,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:18,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-12 14:43:18,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:18,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-12 14:43:18,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-10-12 14:43:18,807 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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) [2024-10-12 14:43:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:19,264 INFO L93 Difference]: Finished difference Result 134 states and 149 transitions. [2024-10-12 14:43:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-10-12 14:43:19,264 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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 35 [2024-10-12 14:43:19,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:19,266 INFO L225 Difference]: With dead ends: 134 [2024-10-12 14:43:19,266 INFO L226 Difference]: Without dead ends: 132 [2024-10-12 14:43:19,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2024-10-12 14:43:19,267 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:19,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 132 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:43:19,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-12 14:43:19,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 85. [2024-10-12 14:43:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.119047619047619) internal successors, (94), 84 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) [2024-10-12 14:43:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2024-10-12 14:43:19,279 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 35 [2024-10-12 14:43:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:19,279 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2024-10-12 14:43:19,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 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) [2024-10-12 14:43:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2024-10-12 14:43:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-12 14:43:19,280 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:19,281 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:19,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-12 14:43:19,481 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,SelfDestructingSolverStorable13 [2024-10-12 14:43:19,481 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:19,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:19,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1685496003, now seen corresponding path program 4 times [2024-10-12 14:43:19,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:19,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867303395] [2024-10-12 14:43:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:19,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:19,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:19,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867303395] [2024-10-12 14:43:19,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867303395] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:19,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594907533] [2024-10-12 14:43:19,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:43:19,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:19,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:19,791 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) [2024-10-12 14:43:19,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 14:43:19,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:43:19,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:43:19,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-12 14:43:19,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:20,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:20,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594907533] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:20,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:20,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2024-10-12 14:43:20,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935573863] [2024-10-12 14:43:20,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:20,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-12 14:43:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:20,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-12 14:43:20,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2024-10-12 14:43:20,444 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:20,777 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2024-10-12 14:43:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 14:43:20,777 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-10-12 14:43:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:20,778 INFO L225 Difference]: With dead ends: 168 [2024-10-12 14:43:20,778 INFO L226 Difference]: Without dead ends: 106 [2024-10-12 14:43:20,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2024-10-12 14:43:20,780 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 238 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:20,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 134 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:43:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-10-12 14:43:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2024-10-12 14:43:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 96 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2024-10-12 14:43:20,796 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 40 [2024-10-12 14:43:20,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:20,798 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2024-10-12 14:43:20,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2024-10-12 14:43:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-12 14:43:20,799 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:20,799 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:20,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-12 14:43:20,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-12 14:43:21,000 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:21,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2033322186, now seen corresponding path program 5 times [2024-10-12 14:43:21,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:21,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819299624] [2024-10-12 14:43:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:21,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:21,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:21,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819299624] [2024-10-12 14:43:21,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819299624] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:21,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560449621] [2024-10-12 14:43:21,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:43:21,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:21,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:21,467 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) [2024-10-12 14:43:21,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 14:43:21,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-12 14:43:21,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:43:21,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-12 14:43:21,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:21,643 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 [2024-10-12 14:43:21,716 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 [2024-10-12 14:43:21,762 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:43:21,762 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 [2024-10-12 14:43:21,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:43:21,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 38 [2024-10-12 14:43:21,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:43:21,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 48 [2024-10-12 14:43:22,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:43:22,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 22 [2024-10-12 14:43:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:22,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:23,035 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 87 treesize of output 83 [2024-10-12 14:43:23,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:43:23,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 550 treesize of output 502 [2024-10-12 14:43:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:23,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560449621] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:23,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:23,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 48 [2024-10-12 14:43:23,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132409409] [2024-10-12 14:43:23,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:23,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-10-12 14:43:23,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:23,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-10-12 14:43:23,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2042, Unknown=0, NotChecked=0, Total=2256 [2024-10-12 14:43:23,122 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:27,580 INFO L93 Difference]: Finished difference Result 242 states and 268 transitions. [2024-10-12 14:43:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-10-12 14:43:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 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 [2024-10-12 14:43:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:27,582 INFO L225 Difference]: With dead ends: 242 [2024-10-12 14:43:27,582 INFO L226 Difference]: Without dead ends: 233 [2024-10-12 14:43:27,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1882, Invalid=11000, Unknown=0, NotChecked=0, Total=12882 [2024-10-12 14:43:27,586 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 668 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:27,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 403 Invalid, 1708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-12 14:43:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-10-12 14:43:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 142. [2024-10-12 14:43:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 141 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 157 transitions. [2024-10-12 14:43:27,605 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 157 transitions. Word has length 44 [2024-10-12 14:43:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:27,606 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 157 transitions. [2024-10-12 14:43:27,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:27,607 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 157 transitions. [2024-10-12 14:43:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-12 14:43:27,607 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:27,608 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:27,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-12 14:43:27,808 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,SelfDestructingSolverStorable15 [2024-10-12 14:43:27,808 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:27,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:27,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1748917570, now seen corresponding path program 3 times [2024-10-12 14:43:27,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:27,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293657266] [2024-10-12 14:43:27,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:27,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:28,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:28,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293657266] [2024-10-12 14:43:28,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293657266] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:28,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692742817] [2024-10-12 14:43:28,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:43:28,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:28,221 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) [2024-10-12 14:43:28,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 14:43:28,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-12 14:43:28,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:43:28,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-12 14:43:28,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:28,365 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 [2024-10-12 14:43:28,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-10-12 14:43:28,523 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 19 treesize of output 7 [2024-10-12 14:43:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:28,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:28,710 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 [2024-10-12 14:43:28,713 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 18 treesize of output 14 [2024-10-12 14:43:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:28,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692742817] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:28,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:28,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2024-10-12 14:43:28,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560652208] [2024-10-12 14:43:28,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:28,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-12 14:43:28,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:28,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-12 14:43:28,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-10-12 14:43:28,728 INFO L87 Difference]: Start difference. First operand 142 states and 157 transitions. Second operand has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 29 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:29,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:29,607 INFO L93 Difference]: Finished difference Result 216 states and 237 transitions. [2024-10-12 14:43:29,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-12 14:43:29,608 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 29 states have internal predecessors, (107), 0 states have call successors, (0), 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 [2024-10-12 14:43:29,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:29,609 INFO L225 Difference]: With dead ends: 216 [2024-10-12 14:43:29,609 INFO L226 Difference]: Without dead ends: 207 [2024-10-12 14:43:29,609 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=440, Invalid=2982, Unknown=0, NotChecked=0, Total=3422 [2024-10-12 14:43:29,610 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 157 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:29,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 252 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 14:43:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-10-12 14:43:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 121. [2024-10-12 14:43:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1083333333333334) internal successors, (133), 120 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2024-10-12 14:43:29,624 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 44 [2024-10-12 14:43:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:29,624 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2024-10-12 14:43:29,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.689655172413793) internal successors, (107), 29 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2024-10-12 14:43:29,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-12 14:43:29,624 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:29,625 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:29,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-12 14:43:29,825 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,SelfDestructingSolverStorable16 [2024-10-12 14:43:29,825 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:29,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:29,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1715777866, now seen corresponding path program 2 times [2024-10-12 14:43:29,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:29,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798800323] [2024-10-12 14:43:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:29,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:30,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:30,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798800323] [2024-10-12 14:43:30,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798800323] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:30,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960584399] [2024-10-12 14:43:30,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:43:30,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:30,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:30,176 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) [2024-10-12 14:43:30,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-12 14:43:30,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:43:30,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:43:30,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-12 14:43:30,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:30,352 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 [2024-10-12 14:43:30,384 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 [2024-10-12 14:43:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:30,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:30,765 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 [2024-10-12 14:43:30,767 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 [2024-10-12 14:43:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:30,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960584399] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:30,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:30,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 30 [2024-10-12 14:43:30,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118256863] [2024-10-12 14:43:30,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:30,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-12 14:43:30,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-12 14:43:30,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2024-10-12 14:43:30,781 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:31,630 INFO L93 Difference]: Finished difference Result 174 states and 193 transitions. [2024-10-12 14:43:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-10-12 14:43:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-10-12 14:43:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:31,632 INFO L225 Difference]: With dead ends: 174 [2024-10-12 14:43:31,632 INFO L226 Difference]: Without dead ends: 172 [2024-10-12 14:43:31,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=354, Invalid=2402, Unknown=0, NotChecked=0, Total=2756 [2024-10-12 14:43:31,634 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 88 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1112 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:31,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 226 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1112 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-12 14:43:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-10-12 14:43:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2024-10-12 14:43:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.112) internal successors, (139), 125 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 139 transitions. [2024-10-12 14:43:31,675 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 139 transitions. Word has length 44 [2024-10-12 14:43:31,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:31,675 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 139 transitions. [2024-10-12 14:43:31,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:31,676 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 139 transitions. [2024-10-12 14:43:31,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-12 14:43:31,680 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:31,680 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:31,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-12 14:43:31,881 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,SelfDestructingSolverStorable17 [2024-10-12 14:43:31,881 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:31,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:31,881 INFO L85 PathProgramCache]: Analyzing trace with hash -647620246, now seen corresponding path program 4 times [2024-10-12 14:43:31,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:31,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303173464] [2024-10-12 14:43:31,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:31,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:32,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:32,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303173464] [2024-10-12 14:43:32,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303173464] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:32,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106409768] [2024-10-12 14:43:32,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:43:32,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:32,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:32,229 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) [2024-10-12 14:43:32,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-12 14:43:32,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:43:32,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:43:32,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-12 14:43:32,311 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:32,325 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 [2024-10-12 14:43:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:32,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:32,568 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 [2024-10-12 14:43:32,570 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 [2024-10-12 14:43:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:32,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106409768] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:32,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:32,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2024-10-12 14:43:32,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815968146] [2024-10-12 14:43:32,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:32,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-12 14:43:32,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:32,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-12 14:43:32,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2024-10-12 14:43:32,588 INFO L87 Difference]: Start difference. First operand 126 states and 139 transitions. Second operand has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:33,557 INFO L93 Difference]: Finished difference Result 202 states and 226 transitions. [2024-10-12 14:43:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-10-12 14:43:33,558 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-10-12 14:43:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:33,559 INFO L225 Difference]: With dead ends: 202 [2024-10-12 14:43:33,559 INFO L226 Difference]: Without dead ends: 200 [2024-10-12 14:43:33,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=2841, Unknown=0, NotChecked=0, Total=3192 [2024-10-12 14:43:33,561 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:33,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 199 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-12 14:43:33,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-10-12 14:43:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 136. [2024-10-12 14:43:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1111111111111112) internal successors, (150), 135 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2024-10-12 14:43:33,580 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 49 [2024-10-12 14:43:33,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:33,581 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2024-10-12 14:43:33,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 21 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:33,581 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2024-10-12 14:43:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-12 14:43:33,581 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:33,582 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:33,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-12 14:43:33,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:33,782 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:33,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:33,782 INFO L85 PathProgramCache]: Analyzing trace with hash 807859062, now seen corresponding path program 6 times [2024-10-12 14:43:33,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:33,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520104131] [2024-10-12 14:43:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:33,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 73 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:34,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:34,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520104131] [2024-10-12 14:43:34,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520104131] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:34,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400557701] [2024-10-12 14:43:34,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 14:43:34,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:34,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:34,122 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) [2024-10-12 14:43:34,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-12 14:43:34,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-12 14:43:34,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:43:34,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 14:43:34,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:34,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 99 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:34,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400557701] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:34,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:34,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2024-10-12 14:43:34,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501886576] [2024-10-12 14:43:34,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:34,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-10-12 14:43:34,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:34,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-10-12 14:43:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2024-10-12 14:43:34,942 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand has 43 states, 43 states have (on average 3.5348837209302326) internal successors, (152), 43 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:43:35,168 INFO L93 Difference]: Finished difference Result 262 states and 285 transitions. [2024-10-12 14:43:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-12 14:43:35,168 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.5348837209302326) internal successors, (152), 43 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-10-12 14:43:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:43:35,169 INFO L225 Difference]: With dead ends: 262 [2024-10-12 14:43:35,170 INFO L226 Difference]: Without dead ends: 170 [2024-10-12 14:43:35,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1838, Unknown=0, NotChecked=0, Total=2450 [2024-10-12 14:43:35,171 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 315 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:43:35,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 151 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:43:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-12 14:43:35,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 144. [2024-10-12 14:43:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.097902097902098) internal successors, (157), 143 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:35,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 157 transitions. [2024-10-12 14:43:35,193 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 157 transitions. Word has length 54 [2024-10-12 14:43:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:43:35,193 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 157 transitions. [2024-10-12 14:43:35,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.5348837209302326) internal successors, (152), 43 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:35,193 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 157 transitions. [2024-10-12 14:43:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-12 14:43:35,194 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:43:35,194 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:43:35,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-12 14:43:35,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:35,395 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:43:35,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:43:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash 33366654, now seen corresponding path program 7 times [2024-10-12 14:43:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:43:35,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226835158] [2024-10-12 14:43:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:43:35,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:43:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:36,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:43:36,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226835158] [2024-10-12 14:43:36,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226835158] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:43:36,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977511826] [2024-10-12 14:43:36,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-12 14:43:36,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:43:36,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:43:36,005 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) [2024-10-12 14:43:36,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-12 14:43:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:43:36,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-12 14:43:36,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:43:36,241 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 [2024-10-12 14:43:36,296 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 22 [2024-10-12 14:43:36,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:43:36,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:43:36,338 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 34 treesize of output 36 [2024-10-12 14:43:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:43:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:43:36,479 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:43:36,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2024-10-12 14:43:36,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:43:36,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:43:36,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:43:36,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-12 14:43:36,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-12 14:43:36,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 61 [2024-10-12 14:43:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 12 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:43:41,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:43:42,676 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 53 treesize of output 49 [2024-10-12 14:43:42,679 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 99 treesize of output 91 [2024-10-12 14:43:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:43:42,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977511826] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:43:42,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:43:42,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 21] total 58 [2024-10-12 14:43:42,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475207452] [2024-10-12 14:43:42,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:43:42,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-10-12 14:43:42,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:43:42,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-10-12 14:43:42,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=2969, Unknown=2, NotChecked=0, Total=3306 [2024-10-12 14:43:42,865 INFO L87 Difference]: Start difference. First operand 144 states and 157 transitions. Second operand has 58 states, 58 states have (on average 2.8448275862068964) internal successors, (165), 58 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:43:55,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:43:59,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:44:15,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:44:23,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-12 14:44:27,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]