./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array20_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/array-patterns/array20_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 4595fcce7ed27c87f4b36557925b67d85fd0fff83d482c199564b06ae0d3b884 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 10:07:25,193 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 10:07:25,261 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 10:07:25,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 10:07:25,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 10:07:25,294 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 10:07:25,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 10:07:25,295 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 10:07:25,296 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 10:07:25,297 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 10:07:25,297 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 10:07:25,298 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 10:07:25,298 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 10:07:25,298 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 10:07:25,299 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 10:07:25,299 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 10:07:25,299 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 10:07:25,300 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 10:07:25,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 10:07:25,303 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 10:07:25,306 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 10:07:25,306 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 10:07:25,306 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 10:07:25,307 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 10:07:25,307 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 10:07:25,308 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 10:07:25,309 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 10:07:25,309 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 10:07:25,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 10:07:25,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 10:07:25,310 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 10:07:25,310 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 10:07:25,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:07:25,311 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 10:07:25,311 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 10:07:25,312 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 10:07:25,312 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 10:07:25,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 10:07:25,313 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 10:07:25,322 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 10:07:25,322 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 10:07:25,323 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 10:07:25,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4595fcce7ed27c87f4b36557925b67d85fd0fff83d482c199564b06ae0d3b884 [2024-11-08 10:07:25,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 10:07:25,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 10:07:25,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 10:07:25,570 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 10:07:25,570 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 10:07:25,571 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array20_pattern.c [2024-11-08 10:07:27,014 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 10:07:27,203 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 10:07:27,203 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array20_pattern.c [2024-11-08 10:07:27,211 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0ae8ad1a/03e00252325a4c6ea8df5a82e63520ba/FLAG24ab806f9 [2024-11-08 10:07:27,591 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0ae8ad1a/03e00252325a4c6ea8df5a82e63520ba [2024-11-08 10:07:27,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 10:07:27,594 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 10:07:27,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 10:07:27,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 10:07:27,601 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 10:07:27,602 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ba63dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27, skipping insertion in model container [2024-11-08 10:07:27,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,627 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 10:07:27,787 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/array20_pattern.c[1444,1457] [2024-11-08 10:07:27,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:07:27,814 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 10:07:27,824 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/array20_pattern.c[1444,1457] [2024-11-08 10:07:27,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:07:27,853 INFO L204 MainTranslator]: Completed translation [2024-11-08 10:07:27,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27 WrapperNode [2024-11-08 10:07:27,854 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 10:07:27,855 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 10:07:27,855 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 10:07:27,856 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 10:07:27,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,867 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,893 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 104 [2024-11-08 10:07:27,894 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 10:07:27,895 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 10:07:27,895 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 10:07:27,895 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 10:07:27,905 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,907 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,919 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-08 10:07:27,919 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,919 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,926 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,933 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,935 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 10:07:27,938 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 10:07:27,938 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 10:07:27,938 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 10:07:27,939 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (1/1) ... [2024-11-08 10:07:27,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:07:27,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:07:27,982 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) [2024-11-08 10:07:27,990 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 [2024-11-08 10:07:28,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 10:07:28,033 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 10:07:28,033 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 10:07:28,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 10:07:28,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 10:07:28,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 10:07:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 10:07:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 10:07:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 10:07:28,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 10:07:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 10:07:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 10:07:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 10:07:28,116 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 10:07:28,118 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 10:07:28,362 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-11-08 10:07:28,362 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 10:07:28,376 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 10:07:28,377 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-08 10:07:28,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:07:28 BoogieIcfgContainer [2024-11-08 10:07:28,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 10:07:28,380 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 10:07:28,380 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 10:07:28,383 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 10:07:28,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 10:07:27" (1/3) ... [2024-11-08 10:07:28,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8a1a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:07:28, skipping insertion in model container [2024-11-08 10:07:28,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:07:27" (2/3) ... [2024-11-08 10:07:28,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8a1a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:07:28, skipping insertion in model container [2024-11-08 10:07:28,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:07:28" (3/3) ... [2024-11-08 10:07:28,388 INFO L112 eAbstractionObserver]: Analyzing ICFG array20_pattern.c [2024-11-08 10:07:28,403 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 10:07:28,403 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 10:07:28,446 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 10:07:28,451 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;@7c6e6f82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 10:07:28,452 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 10:07:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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) [2024-11-08 10:07:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 10:07:28,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:07:28,460 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:07:28,461 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:07:28,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:07:28,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2132324569, now seen corresponding path program 1 times [2024-11-08 10:07:28,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:07:28,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409721737] [2024-11-08 10:07:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:07:28,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:07:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:28,595 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:07:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:28,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 10:07:28,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:07:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409721737] [2024-11-08 10:07:28,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409721737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:07:28,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:07:28,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 10:07:28,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125457170] [2024-11-08 10:07:28,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:07:28,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 10:07:28,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:07:28,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 10:07:28,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 10:07:28,640 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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) [2024-11-08 10:07:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:07:28,658 INFO L93 Difference]: Finished difference Result 63 states and 97 transitions. [2024-11-08 10:07:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 10:07:28,660 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 [2024-11-08 10:07:28,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:07:28,664 INFO L225 Difference]: With dead ends: 63 [2024-11-08 10:07:28,664 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 10:07:28,666 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 [2024-11-08 10:07:28,669 INFO L432 NwaCegarLoop]: 41 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, 41 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 [2024-11-08 10:07:28,670 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:07:28,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 10:07:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-08 10:07:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 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) [2024-11-08 10:07:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-11-08 10:07:28,701 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 15 [2024-11-08 10:07:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:07:28,702 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-11-08 10:07:28,702 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) [2024-11-08 10:07:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-11-08 10:07:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 10:07:28,704 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:07:28,705 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] [2024-11-08 10:07:28,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 10:07:28,705 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:07:28,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:07:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1872922357, now seen corresponding path program 1 times [2024-11-08 10:07:28,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:07:28,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158226708] [2024-11-08 10:07:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:07:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:07:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:07:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,143 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-08 10:07:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,158 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 10:07:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 10:07:29,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:07:29,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158226708] [2024-11-08 10:07:29,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158226708] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:07:29,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:07:29,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 10:07:29,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806548185] [2024-11-08 10:07:29,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:07:29,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 10:07:29,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:07:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 10:07:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:07:29,172 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-11-08 10:07:29,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:07:29,194 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2024-11-08 10:07:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 10:07:29,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 30 [2024-11-08 10:07:29,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:07:29,196 INFO L225 Difference]: With dead ends: 36 [2024-11-08 10:07:29,196 INFO L226 Difference]: Without dead ends: 32 [2024-11-08 10:07:29,196 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:07:29,197 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:07:29,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 84 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:07:29,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-08 10:07:29,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-08 10:07:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 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) [2024-11-08 10:07:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-11-08 10:07:29,212 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2024-11-08 10:07:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:07:29,213 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-11-08 10:07:29,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2024-11-08 10:07:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-11-08 10:07:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 10:07:29,214 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:07:29,215 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] [2024-11-08 10:07:29,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 10:07:29,215 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:07:29,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:07:29,215 INFO L85 PathProgramCache]: Analyzing trace with hash 212512359, now seen corresponding path program 1 times [2024-11-08 10:07:29,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:07:29,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991914490] [2024-11-08 10:07:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:07:29,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:07:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,378 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:07:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,385 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-08 10:07:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,392 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 10:07:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 10:07:29,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:07:29,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991914490] [2024-11-08 10:07:29,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991914490] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:07:29,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:07:29,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 10:07:29,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473660339] [2024-11-08 10:07:29,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:07:29,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 10:07:29,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:07:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 10:07:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 10:07:29,407 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2024-11-08 10:07:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:07:29,509 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2024-11-08 10:07:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 10:07:29,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 35 [2024-11-08 10:07:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:07:29,511 INFO L225 Difference]: With dead ends: 67 [2024-11-08 10:07:29,511 INFO L226 Difference]: Without dead ends: 42 [2024-11-08 10:07:29,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 10:07:29,513 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:07:29,513 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 74 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:07:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-08 10:07:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2024-11-08 10:07:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 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) [2024-11-08 10:07:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2024-11-08 10:07:29,519 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 35 [2024-11-08 10:07:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:07:29,520 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2024-11-08 10:07:29,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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) [2024-11-08 10:07:29,520 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2024-11-08 10:07:29,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-08 10:07:29,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:07:29,521 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] [2024-11-08 10:07:29,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 10:07:29,521 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:07:29,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:07:29,522 INFO L85 PathProgramCache]: Analyzing trace with hash -654332553, now seen corresponding path program 1 times [2024-11-08 10:07:29,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:07:29,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956340693] [2024-11-08 10:07:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:07:29,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:07:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,638 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:07:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,641 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 10:07:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,644 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-08 10:07:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 10:07:29,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:07:29,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956340693] [2024-11-08 10:07:29,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956340693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:07:29,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:07:29,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 10:07:29,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423892139] [2024-11-08 10:07:29,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:07:29,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 10:07:29,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:07:29,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 10:07:29,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:07:29,653 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2024-11-08 10:07:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:07:29,741 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2024-11-08 10:07:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 10:07:29,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 38 [2024-11-08 10:07:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:07:29,742 INFO L225 Difference]: With dead ends: 69 [2024-11-08 10:07:29,743 INFO L226 Difference]: Without dead ends: 41 [2024-11-08 10:07:29,744 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 [2024-11-08 10:07:29,746 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:07:29,748 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 67 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:07:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-08 10:07:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2024-11-08 10:07:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 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) [2024-11-08 10:07:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-11-08 10:07:29,758 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 38 [2024-11-08 10:07:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:07:29,759 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-11-08 10:07:29,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2024-11-08 10:07:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-11-08 10:07:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 10:07:29,762 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:07:29,762 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, 1, 1] [2024-11-08 10:07:29,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 10:07:29,762 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:07:29,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:07:29,763 INFO L85 PathProgramCache]: Analyzing trace with hash 579061941, now seen corresponding path program 1 times [2024-11-08 10:07:29,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:07:29,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144879047] [2024-11-08 10:07:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:07:29,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:07:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:07:29,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584301899] [2024-11-08 10:07:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:07:29,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:07:29,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:07:29,822 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) [2024-11-08 10:07:29,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 10:07:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:29,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-08 10:07:29,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:07:30,227 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 [2024-11-08 10:07:30,864 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2024-11-08 10:07:30,864 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 30 treesize of output 18 [2024-11-08 10:07:30,964 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 [2024-11-08 10:07:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:07:31,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:07:52,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:07:52,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144879047] [2024-11-08 10:07:52,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:07:52,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584301899] [2024-11-08 10:07:52,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584301899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:07:52,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:07:52,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-11-08 10:07:52,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631308684] [2024-11-08 10:07:52,696 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:07:52,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-08 10:07:52,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:07:52,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-08 10:07:52,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2024-11-08 10:07:52,699 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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) [2024-11-08 10:07:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:07:53,506 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2024-11-08 10:07:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-08 10:07:53,507 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 40 [2024-11-08 10:07:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:07:53,509 INFO L225 Difference]: With dead ends: 110 [2024-11-08 10:07:53,509 INFO L226 Difference]: Without dead ends: 81 [2024-11-08 10:07:53,511 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 10:07:53,511 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 10:07:53,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 164 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 10:07:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-08 10:07:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 63. [2024-11-08 10:07:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 states have internal predecessors, (67), 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) [2024-11-08 10:07:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2024-11-08 10:07:53,525 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 40 [2024-11-08 10:07:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:07:53,525 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2024-11-08 10:07:53,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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) [2024-11-08 10:07:53,526 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2024-11-08 10:07:53,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 10:07:53,528 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:07:53,529 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, 1, 1] [2024-11-08 10:07:53,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 10:07:53,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:07:53,733 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:07:53,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:07:53,733 INFO L85 PathProgramCache]: Analyzing trace with hash -700801737, now seen corresponding path program 1 times [2024-11-08 10:07:53,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:07:53,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084356107] [2024-11-08 10:07:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:07:53,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:07:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:53,777 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:07:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:53,780 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 10:07:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:53,783 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 10:07:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 10:07:53,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:07:53,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084356107] [2024-11-08 10:07:53,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084356107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:07:53,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:07:53,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 10:07:53,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493323750] [2024-11-08 10:07:53,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:07:53,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 10:07:53,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:07:53,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 10:07:53,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 10:07:53,788 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 10:07:53,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:07:53,832 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-11-08 10:07:53,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 10:07:53,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-08 10:07:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:07:53,833 INFO L225 Difference]: With dead ends: 89 [2024-11-08 10:07:53,833 INFO L226 Difference]: Without dead ends: 66 [2024-11-08 10:07:53,834 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 10:07:53,835 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:07:53,835 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:07:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-08 10:07:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-11-08 10:07:53,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 56 states have internal predecessors, (69), 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) [2024-11-08 10:07:53,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2024-11-08 10:07:53,844 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 40 [2024-11-08 10:07:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:07:53,844 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2024-11-08 10:07:53,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-08 10:07:53,845 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2024-11-08 10:07:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 10:07:53,848 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:07:53,848 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, 1, 1] [2024-11-08 10:07:53,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 10:07:53,849 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:07:53,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:07:53,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1287607751, now seen corresponding path program 1 times [2024-11-08 10:07:53,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:07:53,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769321662] [2024-11-08 10:07:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:07:53,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:07:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:54,129 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:07:54,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:54,132 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 10:07:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:54,180 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 10:07:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 10:07:54,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:07:54,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769321662] [2024-11-08 10:07:54,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769321662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:07:54,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280949083] [2024-11-08 10:07:54,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:07:54,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:07:54,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:07:54,213 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) [2024-11-08 10:07:54,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 10:07:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:54,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 10:07:54,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:07:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 10:07:54,456 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:07:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 10:07:54,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280949083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:07:54,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:07:54,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 23 [2024-11-08 10:07:54,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614652272] [2024-11-08 10:07:54,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:07:54,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 10:07:54,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:07:54,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 10:07:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-11-08 10:07:54,691 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 23 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-08 10:07:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:07:55,319 INFO L93 Difference]: Finished difference Result 214 states and 270 transitions. [2024-11-08 10:07:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-08 10:07:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 40 [2024-11-08 10:07:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:07:55,323 INFO L225 Difference]: With dead ends: 214 [2024-11-08 10:07:55,323 INFO L226 Difference]: Without dead ends: 182 [2024-11-08 10:07:55,324 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 10:07:55,325 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 162 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:07:55,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 301 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:07:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-08 10:07:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 114. [2024-11-08 10:07:55,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 100 states have internal predecessors, (123), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 10:07:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 141 transitions. [2024-11-08 10:07:55,344 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 141 transitions. Word has length 40 [2024-11-08 10:07:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:07:55,344 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 141 transitions. [2024-11-08 10:07:55,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 6 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-08 10:07:55,345 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 141 transitions. [2024-11-08 10:07:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 10:07:55,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:07:55,346 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, 1, 1] [2024-11-08 10:07:55,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 10:07:55,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-08 10:07:55,547 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:07:55,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:07:55,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1706965193, now seen corresponding path program 2 times [2024-11-08 10:07:55,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:07:55,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938202526] [2024-11-08 10:07:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:07:55,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:07:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:55,646 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:07:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:55,649 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 10:07:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:55,655 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 10:07:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 10:07:55,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:07:55,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938202526] [2024-11-08 10:07:55,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938202526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:07:55,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789156899] [2024-11-08 10:07:55,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:07:55,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:07:55,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:07:55,669 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) [2024-11-08 10:07:55,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 10:07:55,785 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:07:55,786 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:07:55,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 10:07:55,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:07:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 10:07:55,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:07:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 10:07:55,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789156899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:07:55,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:07:55,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-08 10:07:55,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126662612] [2024-11-08 10:07:55,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:07:55,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 10:07:55,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:07:55,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 10:07:55,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-08 10:07:55,914 INFO L87 Difference]: Start difference. First operand 114 states and 141 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 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) [2024-11-08 10:07:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:07:56,059 INFO L93 Difference]: Finished difference Result 171 states and 207 transitions. [2024-11-08 10:07:56,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 10:07:56,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 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 42 [2024-11-08 10:07:56,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:07:56,060 INFO L225 Difference]: With dead ends: 171 [2024-11-08 10:07:56,061 INFO L226 Difference]: Without dead ends: 120 [2024-11-08 10:07:56,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-08 10:07:56,062 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:07:56,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 167 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:07:56,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-08 10:07:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2024-11-08 10:07:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 98 states have (on average 1.2142857142857142) internal successors, (119), 100 states have internal predecessors, (119), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 10:07:56,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2024-11-08 10:07:56,079 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 42 [2024-11-08 10:07:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:07:56,080 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2024-11-08 10:07:56,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 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) [2024-11-08 10:07:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2024-11-08 10:07:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 10:07:56,081 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:07:56,081 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, 1, 1] [2024-11-08 10:07:56,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 10:07:56,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:07:56,286 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:07:56,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:07:56,286 INFO L85 PathProgramCache]: Analyzing trace with hash 460196979, now seen corresponding path program 3 times [2024-11-08 10:07:56,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:07:56,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739511334] [2024-11-08 10:07:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:07:56,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:07:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:56,416 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:07:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:56,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-08 10:07:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:56,421 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-08 10:07:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:07:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 10:07:56,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:07:56,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739511334] [2024-11-08 10:07:56,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739511334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:07:56,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717777340] [2024-11-08 10:07:56,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:07:56,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:07:56,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:07:56,427 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) [2024-11-08 10:07:56,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 10:07:56,532 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 10:07:56,533 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:07:56,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-08 10:07:56,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:07:56,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 58 [2024-11-08 10:07:56,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 134 [2024-11-08 10:07:57,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:07:57,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2024-11-08 10:07:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 10:07:57,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:07:57,705 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 138 treesize of output 130 [2024-11-08 10:07:57,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:07:57,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 329 [2024-11-08 10:07:58,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:07:58,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 352 [2024-11-08 10:07:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-08 10:07:58,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717777340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:07:58,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:07:58,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 16, 16] total 35 [2024-11-08 10:07:58,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452699906] [2024-11-08 10:07:58,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:07:58,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-08 10:07:58,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:07:58,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-08 10:07:58,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2024-11-08 10:07:58,759 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 35 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 4 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-08 10:08:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:08:02,413 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2024-11-08 10:08:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-08 10:08:02,413 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 4 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 42 [2024-11-08 10:08:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:08:02,414 INFO L225 Difference]: With dead ends: 238 [2024-11-08 10:08:02,415 INFO L226 Difference]: Without dead ends: 198 [2024-11-08 10:08:02,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1208, Invalid=7722, Unknown=0, NotChecked=0, Total=8930 [2024-11-08 10:08:02,419 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 206 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:08:02,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 243 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-08 10:08:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-08 10:08:02,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2024-11-08 10:08:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 98 states have (on average 1.2448979591836735) internal successors, (122), 99 states have internal predecessors, (122), 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) [2024-11-08 10:08:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2024-11-08 10:08:02,448 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 42 [2024-11-08 10:08:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:08:02,449 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2024-11-08 10:08:02,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 4 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-08 10:08:02,452 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2024-11-08 10:08:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 10:08:02,453 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:08:02,453 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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, 1, 1] [2024-11-08 10:08:02,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 10:08:02,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:08:02,654 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:08:02,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:08:02,654 INFO L85 PathProgramCache]: Analyzing trace with hash 822903975, now seen corresponding path program 4 times [2024-11-08 10:08:02,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:08:02,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375191277] [2024-11-08 10:08:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:08:02,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:08:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:02,780 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:08:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:02,782 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 10:08:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:02,785 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 10:08:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 10:08:02,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:08:02,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375191277] [2024-11-08 10:08:02,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375191277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:08:02,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235766600] [2024-11-08 10:08:02,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:08:02,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:08:02,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:08:02,790 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) [2024-11-08 10:08:02,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 10:08:02,855 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:08:02,855 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:08:02,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 10:08:02,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:08:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 10:08:02,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:08:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-08 10:08:03,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235766600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:08:03,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:08:03,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-08 10:08:03,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015688615] [2024-11-08 10:08:03,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:08:03,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 10:08:03,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:08:03,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 10:08:03,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-08 10:08:03,021 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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) [2024-11-08 10:08:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:08:03,188 INFO L93 Difference]: Finished difference Result 126 states and 150 transitions. [2024-11-08 10:08:03,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 10:08:03,188 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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 45 [2024-11-08 10:08:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:08:03,189 INFO L225 Difference]: With dead ends: 126 [2024-11-08 10:08:03,189 INFO L226 Difference]: Without dead ends: 82 [2024-11-08 10:08:03,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-11-08 10:08:03,190 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:08:03,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 105 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:08:03,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-08 10:08:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2024-11-08 10:08:03,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 68 states have internal predecessors, (84), 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) [2024-11-08 10:08:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2024-11-08 10:08:03,205 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 45 [2024-11-08 10:08:03,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:08:03,206 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2024-11-08 10:08:03,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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) [2024-11-08 10:08:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2024-11-08 10:08:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-08 10:08:03,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:08:03,206 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, 1, 1] [2024-11-08 10:08:03,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 10:08:03,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 10:08:03,407 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:08:03,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:08:03,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1727010197, now seen corresponding path program 2 times [2024-11-08 10:08:03,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:08:03,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324183647] [2024-11-08 10:08:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:08:03,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:08:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:03,508 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:08:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:03,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-08 10:08:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:03,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-08 10:08:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-08 10:08:03,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:08:03,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324183647] [2024-11-08 10:08:03,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324183647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:08:03,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370202560] [2024-11-08 10:08:03,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:08:03,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:08:03,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:08:03,518 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) [2024-11-08 10:08:03,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 10:08:03,618 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:08:03,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:08:03,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 10:08:03,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:08:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 10:08:03,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:08:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-08 10:08:03,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370202560] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:08:03,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:08:03,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-08 10:08:03,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437951604] [2024-11-08 10:08:03,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:08:03,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 10:08:03,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:08:03,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 10:08:03,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-08 10:08:03,755 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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) [2024-11-08 10:08:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:08:03,875 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2024-11-08 10:08:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 10:08:03,875 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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 49 [2024-11-08 10:08:03,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:08:03,876 INFO L225 Difference]: With dead ends: 81 [2024-11-08 10:08:03,876 INFO L226 Difference]: Without dead ends: 67 [2024-11-08 10:08:03,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-08 10:08:03,877 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:08:03,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 113 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:08:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-08 10:08:03,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2024-11-08 10:08:03,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 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) [2024-11-08 10:08:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2024-11-08 10:08:03,889 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 49 [2024-11-08 10:08:03,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:08:03,890 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2024-11-08 10:08:03,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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) [2024-11-08 10:08:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2024-11-08 10:08:03,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-08 10:08:03,891 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:08:03,891 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, 1, 1] [2024-11-08 10:08:03,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 10:08:04,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:08:04,092 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:08:04,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:08:04,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1673343477, now seen corresponding path program 5 times [2024-11-08 10:08:04,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:08:04,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074569298] [2024-11-08 10:08:04,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:08:04,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:08:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:08:04,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536245294] [2024-11-08 10:08:04,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:08:04,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:08:04,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:08:04,125 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) [2024-11-08 10:08:04,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 10:08:04,329 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-08 10:08:04,329 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:08:04,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-08 10:08:04,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:08:04,408 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 [2024-11-08 10:08:04,455 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 [2024-11-08 10:08:04,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:08:04,618 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 [2024-11-08 10:08:04,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:08:04,709 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 [2024-11-08 10:08:05,311 INFO L349 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2024-11-08 10:08:05,311 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 187 treesize of output 172 [2024-11-08 10:08:05,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,386 INFO L349 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2024-11-08 10:08:05,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 4 select indices, 4 select index equivalence classes, 26 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 2 case distinctions, treesize of input 135 treesize of output 549 [2024-11-08 10:08:05,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,463 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:08:05,463 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:08:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,475 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:08:05,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,485 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:08:05,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,498 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:08:05,507 INFO L349 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2024-11-08 10:08:05,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 5 select indices, 5 select index equivalence classes, 36 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 170 treesize of output 316 [2024-11-08 10:08:05,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,558 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:08:05,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,568 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:08:05,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,578 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:08:05,586 INFO L349 Elim1Store]: treesize reduction 82, result has 1.2 percent of original size [2024-11-08 10:08:05,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 25 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 130 treesize of output 142 [2024-11-08 10:08:05,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,613 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-08 10:08:05,641 INFO L349 Elim1Store]: treesize reduction 44, result has 47.0 percent of original size [2024-11-08 10:08:05,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 162 [2024-11-08 10:08:05,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2024-11-08 10:08:05,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:08:05,880 INFO L349 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2024-11-08 10:08:05,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 182 [2024-11-08 10:08:07,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 131 [2024-11-08 10:08:07,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:08:07,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 166 treesize of output 202 [2024-11-08 10:08:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 10:08:08,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:08:29,755 WARN L286 SmtUtils]: Spent 9.04s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-08 10:08:41,125 WARN L286 SmtUtils]: Spent 11.37s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)