./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-patterns/array13_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 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-patterns/array13_pattern.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 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-19 16:57:55,642 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 16:57:55,708 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 16:57:55,714 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 16:57:55,716 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 16:57:55,744 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 16:57:55,746 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 16:57:55,747 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 16:57:55,747 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 16:57:55,747 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 16:57:55,748 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 16:57:55,748 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 16:57:55,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 16:57:55,749 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 16:57:55,750 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 16:57:55,750 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 16:57:55,750 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 16:57:55,751 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 16:57:55,751 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 16:57:55,751 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 16:57:55,754 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 16:57:55,755 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 16:57:55,755 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 16:57:55,755 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 16:57:55,755 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 16:57:55,756 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 16:57:55,756 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 16:57:55,756 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 16:57:55,756 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 16:57:55,756 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 16:57:55,756 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 16:57:55,756 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 16:57:55,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 16:57:55,757 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 16:57:55,757 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 16:57:55,757 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 16:57:55,757 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 16:57:55,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 16:57:55,757 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 16:57:55,758 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 16:57:55,758 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 16:57:55,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 16:57:55,758 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78699f7813351c3df7f7fcab3bf98fffd7a92c5cc679034a9d139e9169232d7e [2024-11-19 16:57:55,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 16:57:55,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 16:57:55,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 16:57:55,994 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 16:57:55,994 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 16:57:55,995 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c [2024-11-19 16:57:57,260 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 16:57:57,448 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 16:57:57,449 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array13_pattern.c [2024-11-19 16:57:57,455 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bb47712f/b3acc860a2aa4ffa9a8ef1b3f8669931/FLAGaa356d986 [2024-11-19 16:57:57,469 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bb47712f/b3acc860a2aa4ffa9a8ef1b3f8669931 [2024-11-19 16:57:57,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 16:57:57,473 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 16:57:57,474 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 16:57:57,474 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 16:57:57,478 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 16:57:57,479 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22af37f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57, skipping insertion in model container [2024-11-19 16:57:57,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,496 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 16:57:57,650 WARN L250 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-patterns/array13_pattern.c[1342,1355] [2024-11-19 16:57:57,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 16:57:57,685 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 16:57:57,696 WARN L250 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-patterns/array13_pattern.c[1342,1355] [2024-11-19 16:57:57,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 16:57:57,738 INFO L204 MainTranslator]: Completed translation [2024-11-19 16:57:57,739 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57 WrapperNode [2024-11-19 16:57:57,739 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 16:57:57,740 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 16:57:57,741 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 16:57:57,741 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 16:57:57,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,753 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,774 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2024-11-19 16:57:57,774 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 16:57:57,775 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 16:57:57,775 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 16:57:57,775 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 16:57:57,783 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,784 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,786 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,797 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-19 16:57:57,797 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,798 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,805 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,813 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,815 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 16:57:57,816 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 16:57:57,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 16:57:57,817 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 16:57:57,819 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (1/1) ... [2024-11-19 16:57:57,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 16:57:57,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:57:57,850 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) [2024-11-19 16:57:57,855 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 [2024-11-19 16:57:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 16:57:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-19 16:57:57,894 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-19 16:57:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 16:57:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 16:57:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 16:57:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 16:57:57,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 16:57:57,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 16:57:57,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 16:57:57,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 16:57:57,897 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 16:57:57,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 16:57:57,976 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 16:57:57,978 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 16:57:58,143 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-11-19 16:57:58,143 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 16:57:58,156 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 16:57:58,156 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-19 16:57:58,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:57:58 BoogieIcfgContainer [2024-11-19 16:57:58,158 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 16:57:58,160 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 16:57:58,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 16:57:58,163 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 16:57:58,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:57:57" (1/3) ... [2024-11-19 16:57:58,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b324c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:57:58, skipping insertion in model container [2024-11-19 16:57:58,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:57" (2/3) ... [2024-11-19 16:57:58,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b324c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:57:58, skipping insertion in model container [2024-11-19 16:57:58,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:57:58" (3/3) ... [2024-11-19 16:57:58,167 INFO L112 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2024-11-19 16:57:58,185 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 16:57:58,185 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 16:57:58,244 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 16:57:58,254 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;@44c2ff92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 16:57:58,254 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-19 16:57:58,258 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:57:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-19 16:57:58,266 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:57:58,267 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:57:58,267 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:57:58,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:57:58,272 INFO L85 PathProgramCache]: Analyzing trace with hash -152131175, now seen corresponding path program 1 times [2024-11-19 16:57:58,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:57:58,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001141814] [2024-11-19 16:57:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:57:58,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:57:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:58,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:57:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 16:57:58,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:57:58,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001141814] [2024-11-19 16:57:58,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001141814] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 16:57:58,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 16:57:58,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 16:57:58,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821718938] [2024-11-19 16:57:58,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 16:57:58,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-19 16:57:58,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:57:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-19 16:57:58,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 16:57:58,433 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 16:57:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:57:58,447 INFO L93 Difference]: Finished difference Result 59 states and 91 transitions. [2024-11-19 16:57:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-19 16:57:58,450 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-19 16:57:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:57:58,455 INFO L225 Difference]: With dead ends: 59 [2024-11-19 16:57:58,455 INFO L226 Difference]: Without dead ends: 27 [2024-11-19 16:57:58,457 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-19 16:57:58,462 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-19 16:57:58,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-19 16:57:58,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-19 16:57:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-19 16:57:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:57:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-19 16:57:58,492 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 15 [2024-11-19 16:57:58,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:57:58,492 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-19 16:57:58,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-19 16:57:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-19 16:57:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-19 16:57:58,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:57:58,494 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:57:58,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 16:57:58,494 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:57:58,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:57:58,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2136147464, now seen corresponding path program 1 times [2024-11-19 16:57:58,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:57:58,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133933840] [2024-11-19 16:57:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:57:58,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:57:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:58,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:57:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:58,842 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-19 16:57:58,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:58,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-19 16:57:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 16:57:58,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:57:58,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133933840] [2024-11-19 16:57:58,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133933840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:57:58,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217543630] [2024-11-19 16:57:58,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:57:58,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:57:58,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:57:58,854 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) [2024-11-19 16:57:58,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 16:57:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:58,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 16:57:58,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:57:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 16:57:59,030 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 16:57:59,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217543630] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 16:57:59,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:57:59,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-11-19 16:57:59,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901758733] [2024-11-19 16:57:59,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 16:57:59,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 16:57:59,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:57:59,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 16:57:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-19 16:57:59,035 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 16:57:59,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:57:59,122 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2024-11-19 16:57:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 16:57:59,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-11-19 16:57:59,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:57:59,124 INFO L225 Difference]: With dead ends: 64 [2024-11-19 16:57:59,124 INFO L226 Difference]: Without dead ends: 39 [2024-11-19 16:57:59,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-19 16:57:59,127 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:57:59,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:57:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-19 16:57:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2024-11-19 16:57:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:57:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2024-11-19 16:57:59,136 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 28 [2024-11-19 16:57:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:57:59,138 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2024-11-19 16:57:59,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 16:57:59,138 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2024-11-19 16:57:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-19 16:57:59,139 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:57:59,139 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:57:59,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 16:57:59,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:57:59,340 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:57:59,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:57:59,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1062070342, now seen corresponding path program 1 times [2024-11-19 16:57:59,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:57:59,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52677502] [2024-11-19 16:57:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:57:59,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:57:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:59,445 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:57:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:59,449 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-19 16:57:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:59,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-19 16:57:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 16:57:59,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:57:59,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52677502] [2024-11-19 16:57:59,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52677502] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 16:57:59,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 16:57:59,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 16:57:59,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914299273] [2024-11-19 16:57:59,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 16:57:59,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 16:57:59,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:57:59,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 16:57:59,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 16:57:59,468 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 16:57:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:57:59,531 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2024-11-19 16:57:59,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 16:57:59,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-19 16:57:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:57:59,532 INFO L225 Difference]: With dead ends: 62 [2024-11-19 16:57:59,532 INFO L226 Difference]: Without dead ends: 39 [2024-11-19 16:57:59,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 16:57:59,533 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:57:59,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:57:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-19 16:57:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2024-11-19 16:57:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:57:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2024-11-19 16:57:59,539 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 31 [2024-11-19 16:57:59,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:57:59,540 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2024-11-19 16:57:59,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-19 16:57:59,540 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2024-11-19 16:57:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-19 16:57:59,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:57:59,541 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:57:59,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 16:57:59,541 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:57:59,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:57:59,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1662239748, now seen corresponding path program 1 times [2024-11-19 16:57:59,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:57:59,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748134725] [2024-11-19 16:57:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:57:59,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:57:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:59,659 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:57:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:59,663 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-19 16:57:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:59,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-19 16:57:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-19 16:57:59,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:57:59,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748134725] [2024-11-19 16:57:59,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748134725] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:57:59,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948380239] [2024-11-19 16:57:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:57:59,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:57:59,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:57:59,681 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) [2024-11-19 16:57:59,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 16:57:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:57:59,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 16:57:59,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:57:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:57:59,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:57:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-19 16:57:59,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948380239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:57:59,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:57:59,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-19 16:57:59,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809062248] [2024-11-19 16:57:59,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:57:59,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 16:57:59,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:57:59,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 16:57:59,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-19 16:57:59,861 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:57:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:57:59,947 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-11-19 16:57:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 16:57:59,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-11-19 16:57:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:57:59,948 INFO L225 Difference]: With dead ends: 45 [2024-11-19 16:57:59,948 INFO L226 Difference]: Without dead ends: 41 [2024-11-19 16:57:59,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-19 16:57:59,949 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:57:59,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 82 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:57:59,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-19 16:57:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2024-11-19 16:57:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:57:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-19 16:57:59,955 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2024-11-19 16:57:59,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:57:59,956 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-19 16:57:59,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:57:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-19 16:57:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-19 16:57:59,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:57:59,957 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:57:59,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 16:58:00,157 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,SelfDestructingSolverStorable3 [2024-11-19 16:58:00,158 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:00,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:00,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1380575367, now seen corresponding path program 1 times [2024-11-19 16:58:00,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:00,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026135878] [2024-11-19 16:58:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:00,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:00,348 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:58:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:00,350 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-19 16:58:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:00,379 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-19 16:58:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 16:58:00,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:00,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026135878] [2024-11-19 16:58:00,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026135878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:00,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066086784] [2024-11-19 16:58:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:00,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:00,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:00,410 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) [2024-11-19 16:58:00,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 16:58:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:00,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 16:58:00,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 16:58:00,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 16:58:00,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066086784] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:58:00,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:58:00,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 23 [2024-11-19 16:58:00,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994689239] [2024-11-19 16:58:00,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:00,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 16:58:00,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:00,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 16:58:00,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2024-11-19 16:58:00,815 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 16 states have internal predecessors, (46), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-19 16:58:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:01,483 INFO L93 Difference]: Finished difference Result 162 states and 204 transitions. [2024-11-19 16:58:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-19 16:58:01,483 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 16 states have internal predecessors, (46), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2024-11-19 16:58:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:01,486 INFO L225 Difference]: With dead ends: 162 [2024-11-19 16:58:01,486 INFO L226 Difference]: Without dead ends: 137 [2024-11-19 16:58:01,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2024-11-19 16:58:01,490 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 113 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:01,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 348 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-19 16:58:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-19 16:58:01,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 75. [2024-11-19 16:58:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-19 16:58:01,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2024-11-19 16:58:01,507 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 38 [2024-11-19 16:58:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:01,509 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2024-11-19 16:58:01,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 16 states have internal predecessors, (46), 6 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-19 16:58:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2024-11-19 16:58:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-19 16:58:01,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:01,510 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:01,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-19 16:58:01,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:01,715 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:01,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1967381381, now seen corresponding path program 1 times [2024-11-19 16:58:01,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:01,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163583677] [2024-11-19 16:58:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:01,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 16:58:01,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812888849] [2024-11-19 16:58:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:01,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:01,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:01,748 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) [2024-11-19 16:58:01,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 16:58:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:01,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-19 16:58:01,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:01,879 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 [2024-11-19 16:58:02,143 INFO L349 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2024-11-19 16:58:02,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 24 [2024-11-19 16:58:02,212 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 [2024-11-19 16:58:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 16:58:02,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:02,516 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 30 treesize of output 28 [2024-11-19 16:58:02,522 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 48 treesize of output 46 [2024-11-19 16:58:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 16:58:02,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:02,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163583677] [2024-11-19 16:58:02,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 16:58:02,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812888849] [2024-11-19 16:58:02,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812888849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:58:02,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-19 16:58:02,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2024-11-19 16:58:02,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862775373] [2024-11-19 16:58:02,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:02,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 16:58:02,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:02,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 16:58:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2024-11-19 16:58:02,603 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 16:58:03,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:03,918 INFO L93 Difference]: Finished difference Result 198 states and 251 transitions. [2024-11-19 16:58:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-19 16:58:03,919 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2024-11-19 16:58:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:03,921 INFO L225 Difference]: With dead ends: 198 [2024-11-19 16:58:03,923 INFO L226 Difference]: Without dead ends: 158 [2024-11-19 16:58:03,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=601, Invalid=2591, Unknown=0, NotChecked=0, Total=3192 [2024-11-19 16:58:03,925 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 180 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:03,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 182 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 16:58:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-19 16:58:03,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 125. [2024-11-19 16:58:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 107 states have (on average 1.280373831775701) internal successors, (137), 109 states have internal predecessors, (137), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 16:58:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2024-11-19 16:58:03,953 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 38 [2024-11-19 16:58:03,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:03,954 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2024-11-19 16:58:03,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-19 16:58:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2024-11-19 16:58:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-19 16:58:03,955 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:03,955 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:03,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 16:58:04,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:04,156 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:04,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:04,157 INFO L85 PathProgramCache]: Analyzing trace with hash -707639139, now seen corresponding path program 2 times [2024-11-19 16:58:04,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:04,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001081855] [2024-11-19 16:58:04,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:04,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:04,228 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:58:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:04,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-19 16:58:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:04,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-19 16:58:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 16:58:04,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:04,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001081855] [2024-11-19 16:58:04,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001081855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:04,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487406014] [2024-11-19 16:58:04,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 16:58:04,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:04,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:04,238 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) [2024-11-19 16:58:04,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 16:58:04,287 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 16:58:04,287 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:58:04,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 16:58:04,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 16:58:04,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 16:58:04,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487406014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:58:04,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:58:04,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-19 16:58:04,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429654448] [2024-11-19 16:58:04,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:04,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 16:58:04,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 16:58:04,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 16:58:04,382 INFO L87 Difference]: Start difference. First operand 125 states and 159 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:58:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:04,522 INFO L93 Difference]: Finished difference Result 183 states and 227 transitions. [2024-11-19 16:58:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 16:58:04,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-11-19 16:58:04,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:04,524 INFO L225 Difference]: With dead ends: 183 [2024-11-19 16:58:04,524 INFO L226 Difference]: Without dead ends: 102 [2024-11-19 16:58:04,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-19 16:58:04,525 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:04,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 124 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:58:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-19 16:58:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2024-11-19 16:58:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 84 states have internal predecessors, (104), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-19 16:58:04,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2024-11-19 16:58:04,549 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 40 [2024-11-19 16:58:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:04,551 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2024-11-19 16:58:04,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:58:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2024-11-19 16:58:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-19 16:58:04,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:04,552 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:04,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 16:58:04,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:04,754 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:04,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash -291961609, now seen corresponding path program 2 times [2024-11-19 16:58:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:04,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564701934] [2024-11-19 16:58:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:04,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:04,861 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:58:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:04,864 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-19 16:58:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:04,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-19 16:58:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 16:58:04,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:04,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564701934] [2024-11-19 16:58:04,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564701934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:04,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543979030] [2024-11-19 16:58:04,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 16:58:04,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:04,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:04,870 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) [2024-11-19 16:58:04,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 16:58:04,912 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 16:58:04,912 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:58:04,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 16:58:04,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 16:58:04,967 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 16:58:05,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543979030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:58:05,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:58:05,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-19 16:58:05,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417994455] [2024-11-19 16:58:05,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:05,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 16:58:05,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 16:58:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-19 16:58:05,019 INFO L87 Difference]: Start difference. First operand 96 states and 120 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:58:05,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:05,170 INFO L93 Difference]: Finished difference Result 168 states and 218 transitions. [2024-11-19 16:58:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 16:58:05,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2024-11-19 16:58:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:05,171 INFO L225 Difference]: With dead ends: 168 [2024-11-19 16:58:05,171 INFO L226 Difference]: Without dead ends: 122 [2024-11-19 16:58:05,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-11-19 16:58:05,172 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:05,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 165 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:58:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-19 16:58:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2024-11-19 16:58:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 94 states have internal predecessors, (117), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-19 16:58:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2024-11-19 16:58:05,188 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 40 [2024-11-19 16:58:05,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:05,188 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2024-11-19 16:58:05,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:58:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2024-11-19 16:58:05,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-19 16:58:05,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:05,189 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:05,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 16:58:05,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:05,389 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:05,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:05,390 INFO L85 PathProgramCache]: Analyzing trace with hash 441313725, now seen corresponding path program 3 times [2024-11-19 16:58:05,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:05,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971256721] [2024-11-19 16:58:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:05,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:05,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:58:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:05,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 16:58:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:05,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 16:58:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-19 16:58:05,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:05,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971256721] [2024-11-19 16:58:05,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971256721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:05,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166545869] [2024-11-19 16:58:05,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 16:58:05,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:05,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:05,480 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) [2024-11-19 16:58:05,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 16:58:05,525 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 16:58:05,525 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:58:05,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 16:58:05,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-19 16:58:05,645 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-19 16:58:05,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166545869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:58:05,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:58:05,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 24 [2024-11-19 16:58:05,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659860464] [2024-11-19 16:58:05,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:05,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 16:58:05,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 16:58:05,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2024-11-19 16:58:05,857 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand has 24 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 19 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-19 16:58:06,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:06,225 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2024-11-19 16:58:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-19 16:58:06,226 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 19 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2024-11-19 16:58:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:06,226 INFO L225 Difference]: With dead ends: 116 [2024-11-19 16:58:06,227 INFO L226 Difference]: Without dead ends: 70 [2024-11-19 16:58:06,227 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=1414, Unknown=0, NotChecked=0, Total=1806 [2024-11-19 16:58:06,228 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 153 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:06,228 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 86 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 16:58:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-19 16:58:06,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2024-11-19 16:58:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:58:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2024-11-19 16:58:06,235 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 47 [2024-11-19 16:58:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:06,235 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2024-11-19 16:58:06,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 19 states have internal predecessors, (65), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-19 16:58:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2024-11-19 16:58:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-19 16:58:06,236 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:06,236 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:06,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 16:58:06,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:06,439 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:06,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash -4709032, now seen corresponding path program 4 times [2024-11-19 16:58:06,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:06,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202811124] [2024-11-19 16:58:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:06,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 16:58:06,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445423373] [2024-11-19 16:58:06,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 16:58:06,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:06,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:06,469 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) [2024-11-19 16:58:06,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 16:58:06,631 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 16:58:06,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:58:06,634 WARN L253 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-19 16:58:06,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:06,721 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 [2024-11-19 16:58:06,791 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 [2024-11-19 16:58:06,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:58:06,990 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 [2024-11-19 16:58:07,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:58:07,068 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 33 treesize of output 38 [2024-11-19 16:58:07,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:07,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:07,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:07,638 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 16:58:07,652 INFO L349 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2024-11-19 16:58:07,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 98 [2024-11-19 16:58:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 16:58:08,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:09,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:09,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202811124] [2024-11-19 16:58:09,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 16:58:09,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445423373] [2024-11-19 16:58:09,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445423373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:09,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:58:09,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2024-11-19 16:58:09,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361222938] [2024-11-19 16:58:09,550 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:09,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-19 16:58:09,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-19 16:58:09,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=2510, Unknown=0, NotChecked=0, Total=2862 [2024-11-19 16:58:09,554 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 37 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:58:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:10,257 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2024-11-19 16:58:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-19 16:58:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2024-11-19 16:58:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:10,258 INFO L225 Difference]: With dead ends: 109 [2024-11-19 16:58:10,258 INFO L226 Difference]: Without dead ends: 105 [2024-11-19 16:58:10,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=417, Invalid=3123, Unknown=0, NotChecked=0, Total=3540 [2024-11-19 16:58:10,259 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:10,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 179 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 16:58:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-19 16:58:10,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2024-11-19 16:58:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 79 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 16:58:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-11-19 16:58:10,272 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 56 [2024-11-19 16:58:10,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:10,273 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-11-19 16:58:10,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 33 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:58:10,273 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-11-19 16:58:10,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-19 16:58:10,273 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:10,273 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:10,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 16:58:10,477 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,SelfDestructingSolverStorable9 [2024-11-19 16:58:10,478 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:10,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:10,478 INFO L85 PathProgramCache]: Analyzing trace with hash 214145686, now seen corresponding path program 3 times [2024-11-19 16:58:10,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:10,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319511147] [2024-11-19 16:58:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:10,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 16:58:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865855494] [2024-11-19 16:58:10,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 16:58:10,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:10,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:10,502 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) [2024-11-19 16:58:10,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 16:58:10,917 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-19 16:58:10,917 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:58:10,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-19 16:58:10,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:10,968 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 [2024-11-19 16:58:11,004 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 [2024-11-19 16:58:11,106 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-11-19 16:58:11,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-11-19 16:58:11,180 INFO L349 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2024-11-19 16:58:11,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2024-11-19 16:58:11,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:11,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:11,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:11,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:11,991 INFO L349 Elim1Store]: treesize reduction 618, result has 11.0 percent of original size [2024-11-19 16:58:11,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 6 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 87 case distinctions, treesize of input 134 treesize of output 154 [2024-11-19 16:58:12,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:12,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:12,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:12,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:12,869 INFO L349 Elim1Store]: treesize reduction 96, result has 1.0 percent of original size [2024-11-19 16:58:12,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 103 treesize of output 37 [2024-11-19 16:58:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 16:58:12,961 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:16,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:16,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319511147] [2024-11-19 16:58:16,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 16:58:16,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865855494] [2024-11-19 16:58:16,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865855494] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:16,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:58:16,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2024-11-19 16:58:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812134154] [2024-11-19 16:58:16,931 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:16,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-19 16:58:16,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-19 16:58:16,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1994, Unknown=0, NotChecked=0, Total=2352 [2024-11-19 16:58:16,932 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 33 states, 32 states have (on average 1.5625) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:58:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:18,542 INFO L93 Difference]: Finished difference Result 213 states and 259 transitions. [2024-11-19 16:58:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-19 16:58:18,543 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.5625) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2024-11-19 16:58:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:18,544 INFO L225 Difference]: With dead ends: 213 [2024-11-19 16:58:18,544 INFO L226 Difference]: Without dead ends: 198 [2024-11-19 16:58:18,545 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=742, Invalid=3950, Unknown=0, NotChecked=0, Total=4692 [2024-11-19 16:58:18,545 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 125 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:18,545 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 290 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 16:58:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-19 16:58:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2024-11-19 16:58:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 117 states have (on average 1.2136752136752136) internal successors, (142), 117 states have internal predecessors, (142), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 16:58:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 164 transitions. [2024-11-19 16:58:18,582 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 164 transitions. Word has length 56 [2024-11-19 16:58:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:18,582 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 164 transitions. [2024-11-19 16:58:18,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.5625) internal successors, (50), 29 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-19 16:58:18,583 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 164 transitions. [2024-11-19 16:58:18,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-19 16:58:18,583 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:18,583 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:18,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 16:58:18,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:18,784 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:18,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:18,785 INFO L85 PathProgramCache]: Analyzing trace with hash -70154694, now seen corresponding path program 5 times [2024-11-19 16:58:18,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:18,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266890857] [2024-11-19 16:58:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:18,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:18,896 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:58:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:18,898 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 16:58:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:18,901 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 16:58:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-19 16:58:18,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:18,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266890857] [2024-11-19 16:58:18,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266890857] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:18,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437373936] [2024-11-19 16:58:18,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 16:58:18,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:18,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:18,908 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) [2024-11-19 16:58:18,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 16:58:18,964 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-19 16:58:18,964 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:58:18,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 16:58:18,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-19 16:58:19,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-19 16:58:19,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437373936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:58:19,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:58:19,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-19 16:58:19,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613858709] [2024-11-19 16:58:19,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:19,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 16:58:19,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:19,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 16:58:19,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-19 16:58:19,107 INFO L87 Difference]: Start difference. First operand 133 states and 164 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:58:19,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:19,256 INFO L93 Difference]: Finished difference Result 321 states and 400 transitions. [2024-11-19 16:58:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 16:58:19,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2024-11-19 16:58:19,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:19,258 INFO L225 Difference]: With dead ends: 321 [2024-11-19 16:58:19,258 INFO L226 Difference]: Without dead ends: 204 [2024-11-19 16:58:19,259 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-19 16:58:19,259 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:19,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 159 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:58:19,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-11-19 16:58:19,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 189. [2024-11-19 16:58:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 165 states have (on average 1.2) internal successors, (198), 165 states have internal predecessors, (198), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-19 16:58:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 232 transitions. [2024-11-19 16:58:19,304 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 232 transitions. Word has length 58 [2024-11-19 16:58:19,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:19,304 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 232 transitions. [2024-11-19 16:58:19,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:58:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 232 transitions. [2024-11-19 16:58:19,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-19 16:58:19,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:19,305 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:19,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 16:58:19,505 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,SelfDestructingSolverStorable11 [2024-11-19 16:58:19,505 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:19,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:19,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2106200234, now seen corresponding path program 6 times [2024-11-19 16:58:19,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:19,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200140751] [2024-11-19 16:58:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:19,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:19,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:58:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:19,610 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-19 16:58:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:19,612 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-19 16:58:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-19 16:58:19,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:19,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200140751] [2024-11-19 16:58:19,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200140751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:19,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116127014] [2024-11-19 16:58:19,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 16:58:19,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:19,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:19,618 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) [2024-11-19 16:58:19,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 16:58:19,732 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-19 16:58:19,732 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:58:19,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 16:58:19,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-19 16:58:19,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-19 16:58:19,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116127014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:58:19,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:58:19,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-19 16:58:19,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486533407] [2024-11-19 16:58:19,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:19,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-19 16:58:19,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:19,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-19 16:58:19,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-19 16:58:19,881 INFO L87 Difference]: Start difference. First operand 189 states and 232 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-19 16:58:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:20,230 INFO L93 Difference]: Finished difference Result 264 states and 320 transitions. [2024-11-19 16:58:20,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-19 16:58:20,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2024-11-19 16:58:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:20,232 INFO L225 Difference]: With dead ends: 264 [2024-11-19 16:58:20,232 INFO L226 Difference]: Without dead ends: 201 [2024-11-19 16:58:20,232 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=342, Invalid=1064, Unknown=0, NotChecked=0, Total=1406 [2024-11-19 16:58:20,233 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:20,233 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 259 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-19 16:58:20,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-19 16:58:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 150. [2024-11-19 16:58:20,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 131 states have (on average 1.1603053435114503) internal successors, (152), 131 states have internal predecessors, (152), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-19 16:58:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 178 transitions. [2024-11-19 16:58:20,265 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 178 transitions. Word has length 58 [2024-11-19 16:58:20,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:20,266 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 178 transitions. [2024-11-19 16:58:20,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 16 states have internal predecessors, (74), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-19 16:58:20,266 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 178 transitions. [2024-11-19 16:58:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-19 16:58:20,266 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:20,266 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:20,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-19 16:58:20,467 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,SelfDestructingSolverStorable12 [2024-11-19 16:58:20,467 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:20,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1538493247, now seen corresponding path program 7 times [2024-11-19 16:58:20,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:20,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917438231] [2024-11-19 16:58:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:20,565 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:58:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:20,567 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-19 16:58:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:20,570 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-19 16:58:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 34 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-19 16:58:20,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:20,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917438231] [2024-11-19 16:58:20,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917438231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:20,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781977044] [2024-11-19 16:58:20,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-19 16:58:20,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:20,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:20,576 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) [2024-11-19 16:58:20,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 16:58:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:20,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 16:58:20,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-19 16:58:20,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-19 16:58:20,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781977044] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:58:20,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:58:20,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-19 16:58:20,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372290049] [2024-11-19 16:58:20,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:20,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 16:58:20,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:20,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 16:58:20,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-19 16:58:20,802 INFO L87 Difference]: Start difference. First operand 150 states and 178 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:58:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:20,965 INFO L93 Difference]: Finished difference Result 178 states and 205 transitions. [2024-11-19 16:58:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 16:58:20,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 63 [2024-11-19 16:58:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:20,967 INFO L225 Difference]: With dead ends: 178 [2024-11-19 16:58:20,967 INFO L226 Difference]: Without dead ends: 151 [2024-11-19 16:58:20,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2024-11-19 16:58:20,967 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:20,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 152 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:58:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-19 16:58:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 125. [2024-11-19 16:58:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 16:58:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2024-11-19 16:58:20,992 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 63 [2024-11-19 16:58:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:20,992 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2024-11-19 16:58:20,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:58:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2024-11-19 16:58:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-19 16:58:20,993 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:20,993 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:20,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 16:58:21,193 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,SelfDestructingSolverStorable13 [2024-11-19 16:58:21,193 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:21,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:21,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1335153970, now seen corresponding path program 1 times [2024-11-19 16:58:21,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:21,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730114533] [2024-11-19 16:58:21,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:21,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 16:58:21,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708907889] [2024-11-19 16:58:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:21,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:21,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:21,218 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) [2024-11-19 16:58:21,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 16:58:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:21,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-19 16:58:21,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:21,536 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 [2024-11-19 16:58:21,594 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 [2024-11-19 16:58:21,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:58:21,755 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 [2024-11-19 16:58:21,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:58:21,838 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 33 treesize of output 38 [2024-11-19 16:58:22,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:22,333 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 16:58:22,346 INFO L349 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2024-11-19 16:58:22,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 98 [2024-11-19 16:58:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:22,904 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 16:58:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:22,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:22,914 INFO L349 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2024-11-19 16:58:22,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 94 [2024-11-19 16:58:23,763 INFO L349 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2024-11-19 16:58:23,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 66 treesize of output 38 [2024-11-19 16:58:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 16:58:23,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:25,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:25,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730114533] [2024-11-19 16:58:25,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 16:58:25,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708907889] [2024-11-19 16:58:25,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708907889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:25,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:58:25,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2024-11-19 16:58:25,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919373399] [2024-11-19 16:58:25,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:25,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-19 16:58:25,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:25,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-19 16:58:25,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2854, Unknown=0, NotChecked=0, Total=3192 [2024-11-19 16:58:25,695 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 42 states, 40 states have (on average 1.35) internal successors, (54), 35 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 16:58:26,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:26,865 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2024-11-19 16:58:26,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-19 16:58:26,865 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.35) internal successors, (54), 35 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 70 [2024-11-19 16:58:26,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:26,866 INFO L225 Difference]: With dead ends: 164 [2024-11-19 16:58:26,866 INFO L226 Difference]: Without dead ends: 144 [2024-11-19 16:58:26,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=606, Invalid=4506, Unknown=0, NotChecked=0, Total=5112 [2024-11-19 16:58:26,867 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:26,867 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 247 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 16:58:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-19 16:58:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2024-11-19 16:58:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 115 states have (on average 1.1391304347826088) internal successors, (131), 115 states have internal predecessors, (131), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 16:58:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 153 transitions. [2024-11-19 16:58:26,892 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 153 transitions. Word has length 70 [2024-11-19 16:58:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:26,892 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 153 transitions. [2024-11-19 16:58:26,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.35) internal successors, (54), 35 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 16:58:26,892 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 153 transitions. [2024-11-19 16:58:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-19 16:58:26,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:26,892 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:26,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 16:58:27,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 16:58:27,093 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:27,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:27,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1554008688, now seen corresponding path program 1 times [2024-11-19 16:58:27,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:27,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603454747] [2024-11-19 16:58:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:27,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 16:58:27,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813832196] [2024-11-19 16:58:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:27,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:27,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:27,111 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) [2024-11-19 16:58:27,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 16:58:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:27,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-19 16:58:27,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:27,478 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 [2024-11-19 16:58:27,512 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 [2024-11-19 16:58:27,635 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 0 case distinctions, treesize of input 30 treesize of output 21 [2024-11-19 16:58:27,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:58:27,704 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 33 treesize of output 38 [2024-11-19 16:58:28,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:28,148 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 16:58:28,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:28,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:28,165 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-19 16:58:28,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 106 [2024-11-19 16:58:28,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:28,715 INFO L349 Elim1Store]: treesize reduction 284, result has 13.1 percent of original size [2024-11-19 16:58:28,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 84 treesize of output 94 [2024-11-19 16:58:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 71 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 16:58:29,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:30,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603454747] [2024-11-19 16:58:30,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 16:58:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813832196] [2024-11-19 16:58:30,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813832196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:30,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:58:30,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2024-11-19 16:58:30,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182199977] [2024-11-19 16:58:30,105 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:30,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-19 16:58:30,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:30,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-19 16:58:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2445, Unknown=0, NotChecked=0, Total=2756 [2024-11-19 16:58:30,106 INFO L87 Difference]: Start difference. First operand 133 states and 153 transitions. Second operand has 39 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 33 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 16:58:30,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:30,931 INFO L93 Difference]: Finished difference Result 183 states and 207 transitions. [2024-11-19 16:58:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-19 16:58:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 33 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 70 [2024-11-19 16:58:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:30,932 INFO L225 Difference]: With dead ends: 183 [2024-11-19 16:58:30,932 INFO L226 Difference]: Without dead ends: 163 [2024-11-19 16:58:30,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=388, Invalid=3034, Unknown=0, NotChecked=0, Total=3422 [2024-11-19 16:58:30,933 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:30,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 373 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-19 16:58:30,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-19 16:58:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 143. [2024-11-19 16:58:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 122 states have (on average 1.139344262295082) internal successors, (139), 122 states have internal predecessors, (139), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-19 16:58:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 165 transitions. [2024-11-19 16:58:30,960 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 165 transitions. Word has length 70 [2024-11-19 16:58:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:30,960 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 165 transitions. [2024-11-19 16:58:30,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 33 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 16:58:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 165 transitions. [2024-11-19 16:58:30,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-19 16:58:30,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:30,961 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:30,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 16:58:31,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:31,162 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:31,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:31,163 INFO L85 PathProgramCache]: Analyzing trace with hash 940787184, now seen corresponding path program 2 times [2024-11-19 16:58:31,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:31,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322032825] [2024-11-19 16:58:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:31,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 16:58:31,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342663971] [2024-11-19 16:58:31,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 16:58:31,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:31,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:31,184 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) [2024-11-19 16:58:31,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 16:58:31,469 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 16:58:31,469 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:58:31,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-19 16:58:31,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:31,505 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 [2024-11-19 16:58:31,538 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 [2024-11-19 16:58:31,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:31,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:58:31,619 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 28 treesize of output 30 [2024-11-19 16:58:31,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:31,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:31,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:31,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:31,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:58:31,681 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 39 treesize of output 44 [2024-11-19 16:58:31,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:31,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:31,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:31,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:31,970 INFO L349 Elim1Store]: treesize reduction 156, result has 18.3 percent of original size [2024-11-19 16:58:31,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 66 treesize of output 62 [2024-11-19 16:58:32,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:32,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:32,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:32,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:32,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:32,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:32,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:32,354 INFO L349 Elim1Store]: treesize reduction 80, result has 27.9 percent of original size [2024-11-19 16:58:32,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 30 case distinctions, treesize of input 88 treesize of output 120 [2024-11-19 16:58:33,661 INFO L349 Elim1Store]: treesize reduction 62, result has 46.6 percent of original size [2024-11-19 16:58:33,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 112 [2024-11-19 16:58:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-19 16:58:34,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:39,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:39,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322032825] [2024-11-19 16:58:39,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 16:58:39,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342663971] [2024-11-19 16:58:39,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342663971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:39,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:58:39,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2024-11-19 16:58:39,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900560515] [2024-11-19 16:58:39,522 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:39,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-19 16:58:39,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:39,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-19 16:58:39,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2056, Unknown=0, NotChecked=0, Total=2352 [2024-11-19 16:58:39,524 INFO L87 Difference]: Start difference. First operand 143 states and 165 transitions. Second operand has 33 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-19 16:58:43,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:43,603 INFO L93 Difference]: Finished difference Result 367 states and 443 transitions. [2024-11-19 16:58:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-19 16:58:43,603 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2024-11-19 16:58:43,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:43,605 INFO L225 Difference]: With dead ends: 367 [2024-11-19 16:58:43,605 INFO L226 Difference]: Without dead ends: 331 [2024-11-19 16:58:43,607 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=772, Invalid=5234, Unknown=0, NotChecked=0, Total=6006 [2024-11-19 16:58:43,607 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 87 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:43,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 458 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-19 16:58:43,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-11-19 16:58:43,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 155. [2024-11-19 16:58:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-19 16:58:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 179 transitions. [2024-11-19 16:58:43,655 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 179 transitions. Word has length 70 [2024-11-19 16:58:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:43,655 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 179 transitions. [2024-11-19 16:58:43,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.65625) internal successors, (53), 31 states have internal predecessors, (53), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-19 16:58:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 179 transitions. [2024-11-19 16:58:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-19 16:58:43,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:43,656 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:43,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 16:58:43,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 16:58:43,857 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:43,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:43,857 INFO L85 PathProgramCache]: Analyzing trace with hash 762730145, now seen corresponding path program 8 times [2024-11-19 16:58:43,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:43,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841501683] [2024-11-19 16:58:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:43,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:43,982 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-19 16:58:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:43,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-19 16:58:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:43,985 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-11-19 16:58:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 16:58:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-19 16:58:43,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841501683] [2024-11-19 16:58:43,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841501683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:43,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967549060] [2024-11-19 16:58:43,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 16:58:43,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:43,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:43,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:58:43,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 16:58:44,062 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 16:58:44,062 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:58:44,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 16:58:44,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-19 16:58:44,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2024-11-19 16:58:44,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967549060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 16:58:44,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 16:58:44,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-19 16:58:44,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460574398] [2024-11-19 16:58:44,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:44,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 16:58:44,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:44,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 16:58:44,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-11-19 16:58:44,191 INFO L87 Difference]: Start difference. First operand 155 states and 179 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:58:44,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:58:44,353 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2024-11-19 16:58:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 16:58:44,353 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2024-11-19 16:58:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:58:44,354 INFO L225 Difference]: With dead ends: 223 [2024-11-19 16:58:44,354 INFO L226 Difference]: Without dead ends: 180 [2024-11-19 16:58:44,355 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-11-19 16:58:44,355 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-19 16:58:44,355 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 114 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-19 16:58:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-19 16:58:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 164. [2024-11-19 16:58:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 140 states have (on average 1.1357142857142857) internal successors, (159), 140 states have internal predecessors, (159), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-19 16:58:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 189 transitions. [2024-11-19 16:58:44,394 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 189 transitions. Word has length 73 [2024-11-19 16:58:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:58:44,395 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 189 transitions. [2024-11-19 16:58:44,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-19 16:58:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 189 transitions. [2024-11-19 16:58:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-19 16:58:44,395 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:58:44,395 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:58:44,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-19 16:58:44,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 16:58:44,596 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:58:44,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:58:44,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1039611082, now seen corresponding path program 3 times [2024-11-19 16:58:44,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:58:44,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912995847] [2024-11-19 16:58:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:58:44,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:58:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 16:58:44,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797148477] [2024-11-19 16:58:44,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 16:58:44,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:58:44,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:58:44,620 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:58:44,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 16:58:45,839 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-19 16:58:45,840 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:58:45,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-19 16:58:45,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:58:45,885 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 [2024-11-19 16:58:45,932 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 [2024-11-19 16:58:46,029 INFO L349 Elim1Store]: treesize reduction 36, result has 39.0 percent of original size [2024-11-19 16:58:46,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 29 [2024-11-19 16:58:46,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:58:46,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-11-19 16:58:46,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,554 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-19 16:58:46,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 69 [2024-11-19 16:58:46,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:46,823 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-19 16:58:46,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 82 treesize of output 69 [2024-11-19 16:58:48,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:48,898 INFO L349 Elim1Store]: treesize reduction 784, result has 11.4 percent of original size [2024-11-19 16:58:48,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 15 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 132 case distinctions, treesize of input 177 treesize of output 206 [2024-11-19 16:58:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:49,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:49,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:49,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:49,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:49,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:49,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:58:49,692 INFO L349 Elim1Store]: treesize reduction 25, result has 32.4 percent of original size [2024-11-19 16:58:49,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 37 [2024-11-19 16:58:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 56 proven. 63 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-19 16:58:49,871 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:58:54,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:58:54,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912995847] [2024-11-19 16:58:54,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 16:58:54,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797148477] [2024-11-19 16:58:54,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797148477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:58:54,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:58:54,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2024-11-19 16:58:54,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672189313] [2024-11-19 16:58:54,998 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 16:58:54,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-19 16:58:54,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:58:54,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-19 16:58:54,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2495, Unknown=0, NotChecked=0, Total=2862 [2024-11-19 16:58:54,999 INFO L87 Difference]: Start difference. First operand 164 states and 189 transitions. Second operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 32 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 16:59:00,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:59:00,210 INFO L93 Difference]: Finished difference Result 334 states and 394 transitions. [2024-11-19 16:59:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-19 16:59:00,211 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 32 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 84 [2024-11-19 16:59:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:59:00,212 INFO L225 Difference]: With dead ends: 334 [2024-11-19 16:59:00,212 INFO L226 Difference]: Without dead ends: 232 [2024-11-19 16:59:00,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2585 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1106, Invalid=7450, Unknown=0, NotChecked=0, Total=8556 [2024-11-19 16:59:00,214 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-19 16:59:00,215 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 334 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-19 16:59:00,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-19 16:59:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 134. [2024-11-19 16:59:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 119 states have (on average 1.1260504201680672) internal successors, (134), 119 states have internal predecessors, (134), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-19 16:59:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2024-11-19 16:59:00,258 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 84 [2024-11-19 16:59:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:59:00,259 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2024-11-19 16:59:00,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 32 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 16:59:00,259 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2024-11-19 16:59:00,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-19 16:59:00,259 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:59:00,259 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:59:00,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 16:59:00,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:59:00,460 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:59:00,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:59:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash 339676106, now seen corresponding path program 4 times [2024-11-19 16:59:00,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:59:00,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181090045] [2024-11-19 16:59:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:59:00,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:59:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 16:59:00,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107382767] [2024-11-19 16:59:00,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 16:59:00,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:59:00,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:59:00,485 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:59:00,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 16:59:01,555 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 16:59:01,555 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:59:01,558 WARN L253 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-19 16:59:01,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:59:01,632 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 [2024-11-19 16:59:01,683 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 [2024-11-19 16:59:01,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:59:01,825 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 [2024-11-19 16:59:01,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:59:01,901 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 33 treesize of output 38 [2024-11-19 16:59:02,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:02,495 INFO L349 Elim1Store]: treesize reduction 284, result has 13.1 percent of original size [2024-11-19 16:59:02,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 84 treesize of output 94 [2024-11-19 16:59:02,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:02,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:02,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:02,830 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 16:59:02,839 INFO L349 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2024-11-19 16:59:02,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 98 [2024-11-19 16:59:03,395 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 16:59:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:03,406 INFO L349 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2024-11-19 16:59:03,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 94 [2024-11-19 16:59:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-19 16:59:04,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:59:06,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:59:06,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181090045] [2024-11-19 16:59:06,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 16:59:06,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107382767] [2024-11-19 16:59:06,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107382767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:59:06,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:59:06,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2024-11-19 16:59:06,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809589915] [2024-11-19 16:59:06,488 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 16:59:06,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-19 16:59:06,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:59:06,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-19 16:59:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=3850, Unknown=0, NotChecked=0, Total=4422 [2024-11-19 16:59:06,490 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 48 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 41 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 16:59:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:59:07,957 INFO L93 Difference]: Finished difference Result 173 states and 194 transitions. [2024-11-19 16:59:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-19 16:59:07,958 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 41 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 84 [2024-11-19 16:59:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:59:07,959 INFO L225 Difference]: With dead ends: 173 [2024-11-19 16:59:07,959 INFO L226 Difference]: Without dead ends: 153 [2024-11-19 16:59:07,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=951, Invalid=6189, Unknown=0, NotChecked=0, Total=7140 [2024-11-19 16:59:07,960 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 82 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-19 16:59:07,960 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 330 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-19 16:59:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-19 16:59:08,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 142. [2024-11-19 16:59:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 124 states have (on average 1.1290322580645162) internal successors, (140), 124 states have internal predecessors, (140), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-19 16:59:08,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 162 transitions. [2024-11-19 16:59:08,013 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 162 transitions. Word has length 84 [2024-11-19 16:59:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:59:08,013 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 162 transitions. [2024-11-19 16:59:08,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 41 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 16:59:08,013 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 162 transitions. [2024-11-19 16:59:08,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-19 16:59:08,014 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:59:08,014 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:59:08,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-19 16:59:08,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:59:08,214 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:59:08,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:59:08,215 INFO L85 PathProgramCache]: Analyzing trace with hash 558530824, now seen corresponding path program 5 times [2024-11-19 16:59:08,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:59:08,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406771690] [2024-11-19 16:59:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:59:08,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:59:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 16:59:08,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223185254] [2024-11-19 16:59:08,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 16:59:08,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:59:08,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:59:08,247 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:59:08,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 16:59:09,443 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-19 16:59:09,443 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:59:09,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-19 16:59:09,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:59:09,475 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 [2024-11-19 16:59:09,511 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 [2024-11-19 16:59:09,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:59:09,640 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 [2024-11-19 16:59:09,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:59:09,706 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 33 treesize of output 38 [2024-11-19 16:59:10,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:10,197 INFO L349 Elim1Store]: treesize reduction 284, result has 13.1 percent of original size [2024-11-19 16:59:10,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 84 treesize of output 94 [2024-11-19 16:59:10,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:10,477 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 16:59:10,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:10,487 INFO L349 Elim1Store]: treesize reduction 45, result has 19.6 percent of original size [2024-11-19 16:59:10,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 74 treesize of output 98 [2024-11-19 16:59:10,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:10,986 INFO L349 Elim1Store]: treesize reduction 284, result has 13.1 percent of original size [2024-11-19 16:59:10,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 7 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 42 case distinctions, treesize of input 84 treesize of output 94 [2024-11-19 16:59:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-19 16:59:11,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 16:59:12,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 16:59:12,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406771690] [2024-11-19 16:59:12,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 16:59:12,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223185254] [2024-11-19 16:59:12,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223185254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 16:59:12,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-19 16:59:12,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2024-11-19 16:59:12,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907089788] [2024-11-19 16:59:12,158 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-19 16:59:12,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-19 16:59:12,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 16:59:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-19 16:59:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2722, Unknown=0, NotChecked=0, Total=3080 [2024-11-19 16:59:12,159 INFO L87 Difference]: Start difference. First operand 142 states and 162 transitions. Second operand has 39 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 33 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 16:59:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-19 16:59:12,914 INFO L93 Difference]: Finished difference Result 191 states and 215 transitions. [2024-11-19 16:59:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-19 16:59:12,915 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 33 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 84 [2024-11-19 16:59:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-19 16:59:12,916 INFO L225 Difference]: With dead ends: 191 [2024-11-19 16:59:12,916 INFO L226 Difference]: Without dead ends: 171 [2024-11-19 16:59:12,916 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=422, Invalid=3238, Unknown=0, NotChecked=0, Total=3660 [2024-11-19 16:59:12,916 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-19 16:59:12,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 345 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-19 16:59:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-19 16:59:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2024-11-19 16:59:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 138 states have internal predecessors, (156), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-19 16:59:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2024-11-19 16:59:12,968 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 84 [2024-11-19 16:59:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-19 16:59:12,968 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2024-11-19 16:59:12,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 33 states have internal predecessors, (57), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-19 16:59:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2024-11-19 16:59:12,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-19 16:59:12,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-19 16:59:12,969 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 16:59:12,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-19 16:59:13,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:59:13,170 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-19 16:59:13,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 16:59:13,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1235145369, now seen corresponding path program 9 times [2024-11-19 16:59:13,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 16:59:13,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578262842] [2024-11-19 16:59:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 16:59:13,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 16:59:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 16:59:13,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661505626] [2024-11-19 16:59:13,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 16:59:13,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 16:59:13,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 16:59:13,191 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 16:59:13,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-19 16:59:14,783 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-19 16:59:14,784 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 16:59:14,787 WARN L253 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-11-19 16:59:14,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 16:59:14,851 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 [2024-11-19 16:59:14,913 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 [2024-11-19 16:59:14,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:59:14,970 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 [2024-11-19 16:59:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,108 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-11-19 16:59:15,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 40 [2024-11-19 16:59:15,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,215 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-11-19 16:59:15,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 46 treesize of output 54 [2024-11-19 16:59:15,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,354 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:59:15,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-19 16:59:15,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:59:15,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-19 16:59:15,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,737 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:59:15,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 77 treesize of output 94 [2024-11-19 16:59:15,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:15,916 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 16:59:15,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 88 treesize of output 108 [2024-11-19 16:59:16,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:16,639 INFO L349 Elim1Store]: treesize reduction 178, result has 48.9 percent of original size [2024-11-19 16:59:16,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 103 treesize of output 212 [2024-11-19 16:59:27,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:27,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 16:59:28,075 INFO L349 Elim1Store]: treesize reduction 716, result has 17.3 percent of original size [2024-11-19 16:59:28,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 36 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 703 treesize of output 353 [2024-11-19 16:59:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 2 proven. 228 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 16:59:30,936 INFO L311 TraceCheckSpWp]: Computing backward predicates...