./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f 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/loop-crafted/simple_array_index_value_1-1.i -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 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 19:44:53,557 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 19:44:53,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 19:44:53,601 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 19:44:53,602 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 19:44:53,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 19:44:53,625 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 19:44:53,625 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 19:44:53,625 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 19:44:53,626 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 19:44:53,626 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 19:44:53,627 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 19:44:53,627 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 19:44:53,628 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 19:44:53,629 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 19:44:53,629 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 19:44:53,629 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 19:44:53,629 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 19:44:53,630 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 19:44:53,630 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 19:44:53,630 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 19:44:53,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 19:44:53,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 19:44:53,633 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 19:44:53,634 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 19:44:53,634 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 19:44:53,634 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 19:44:53,634 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 19:44:53,634 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 19:44:53,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 19:44:53,635 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 19:44:53,635 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 19:44:53,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:44:53,635 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 19:44:53,635 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 19:44:53,635 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 19:44:53,636 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 19:44:53,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 19:44:53,636 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 19:44:53,636 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 19:44:53,636 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 19:44:53,637 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 19:44:53,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 [2024-11-11 19:44:53,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 19:44:53,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 19:44:53,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 19:44:53,878 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 19:44:53,878 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 19:44:53,879 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-11-11 19:44:55,106 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 19:44:55,252 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 19:44:55,252 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2024-11-11 19:44:55,257 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d12b0c1a/d7a640e95f5f4438afadf93af2ebc02d/FLAG91e70f07f [2024-11-11 19:44:55,659 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d12b0c1a/d7a640e95f5f4438afadf93af2ebc02d [2024-11-11 19:44:55,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 19:44:55,662 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 19:44:55,662 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 19:44:55,663 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 19:44:55,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 19:44:55,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4974910e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55, skipping insertion in model container [2024-11-11 19:44:55,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,684 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 19:44:55,827 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/loop-crafted/simple_array_index_value_1-1.i[834,847] [2024-11-11 19:44:55,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:44:55,848 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 19:44:55,857 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/loop-crafted/simple_array_index_value_1-1.i[834,847] [2024-11-11 19:44:55,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 19:44:55,881 INFO L204 MainTranslator]: Completed translation [2024-11-11 19:44:55,881 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55 WrapperNode [2024-11-11 19:44:55,881 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 19:44:55,882 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 19:44:55,882 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 19:44:55,882 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 19:44:55,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,893 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,906 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2024-11-11 19:44:55,907 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 19:44:55,907 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 19:44:55,908 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 19:44:55,908 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 19:44:55,916 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,921 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,932 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-11 19:44:55,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,938 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,943 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,944 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,946 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,948 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 19:44:55,949 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 19:44:55,949 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 19:44:55,949 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 19:44:55,949 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (1/1) ... [2024-11-11 19:44:55,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 19:44:55,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:44:55,983 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) [2024-11-11 19:44:55,987 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 [2024-11-11 19:44:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 19:44:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 19:44:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 19:44:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-11 19:44:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 19:44:56,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 19:44:56,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 19:44:56,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 19:44:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 19:44:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 19:44:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 19:44:56,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 19:44:56,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-11 19:44:56,086 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 19:44:56,090 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 19:44:56,245 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-11 19:44:56,246 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 19:44:56,254 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 19:44:56,254 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-11 19:44:56,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:44:56 BoogieIcfgContainer [2024-11-11 19:44:56,255 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 19:44:56,256 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 19:44:56,256 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 19:44:56,259 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 19:44:56,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 07:44:55" (1/3) ... [2024-11-11 19:44:56,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e17aeb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:44:56, skipping insertion in model container [2024-11-11 19:44:56,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 07:44:55" (2/3) ... [2024-11-11 19:44:56,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e17aeb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 07:44:56, skipping insertion in model container [2024-11-11 19:44:56,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 07:44:56" (3/3) ... [2024-11-11 19:44:56,261 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2024-11-11 19:44:56,273 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 19:44:56,274 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 19:44:56,328 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 19:44:56,334 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;@85c6166, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 19:44:56,334 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 19:44:56,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 19:44:56,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-11 19:44:56,342 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:44:56,343 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:44:56,344 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:44:56,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:44:56,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1969531013, now seen corresponding path program 1 times [2024-11-11 19:44:56,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:44:56,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543791235] [2024-11-11 19:44:56,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:44:56,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:44:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:44:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:44:56,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:44:56,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543791235] [2024-11-11 19:44:56,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543791235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 19:44:56,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 19:44:56,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-11 19:44:56,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93401056] [2024-11-11 19:44:56,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 19:44:56,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-11 19:44:56,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:44:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-11 19:44:56,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 19:44:56,615 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:44:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:44:56,670 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2024-11-11 19:44:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-11 19:44:56,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-11 19:44:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:44:56,678 INFO L225 Difference]: With dead ends: 47 [2024-11-11 19:44:56,678 INFO L226 Difference]: Without dead ends: 25 [2024-11-11 19:44:56,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-11 19:44:56,685 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 19:44:56,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 19:44:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-11 19:44:56,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2024-11-11 19:44:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-11 19:44:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-11 19:44:56,722 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2024-11-11 19:44:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:44:56,722 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-11 19:44:56,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:44:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-11 19:44:56,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-11 19:44:56,723 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:44:56,724 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:44:56,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 19:44:56,724 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:44:56,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:44:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1314333447, now seen corresponding path program 1 times [2024-11-11 19:44:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:44:56,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356426873] [2024-11-11 19:44:56,725 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:44:56,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:44:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:44:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:44:56,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:44:56,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356426873] [2024-11-11 19:44:56,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356426873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:44:56,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483381252] [2024-11-11 19:44:56,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:44:56,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:44:56,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:44:56,870 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) [2024-11-11 19:44:56,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 19:44:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:44:56,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-11 19:44:56,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:44:56,955 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 [2024-11-11 19:44:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:44:57,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:44:57,298 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 20 treesize of output 18 [2024-11-11 19:44:57,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2024-11-11 19:44:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:44:57,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483381252] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:44:57,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:44:57,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 9] total 14 [2024-11-11 19:44:57,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681752805] [2024-11-11 19:44:57,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:44:57,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-11 19:44:57,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:44:57,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-11 19:44:57,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-11 19:44:57,337 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:44:57,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:44:57,544 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-11-11 19:44:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-11 19:44:57,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-11 19:44:57,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:44:57,545 INFO L225 Difference]: With dead ends: 53 [2024-11-11 19:44:57,546 INFO L226 Difference]: Without dead ends: 37 [2024-11-11 19:44:57,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-11 19:44:57,548 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-11 19:44:57,549 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 86 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-11 19:44:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-11 19:44:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2024-11-11 19:44:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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) [2024-11-11 19:44:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-11-11 19:44:57,560 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 12 [2024-11-11 19:44:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:44:57,560 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-11-11 19:44:57,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-11 19:44:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-11-11 19:44:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-11 19:44:57,561 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:44:57,562 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:44:57,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 19:44:57,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:44:57,766 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:44:57,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:44:57,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1546622032, now seen corresponding path program 1 times [2024-11-11 19:44:57,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:44:57,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069910733] [2024-11-11 19:44:57,770 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:44:57,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:44:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:44:57,902 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-11-11 19:44:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:44:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-11 19:44:57,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:44:57,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069910733] [2024-11-11 19:44:57,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069910733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:44:57,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736344550] [2024-11-11 19:44:57,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:44:57,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:44:57,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:44:57,913 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) [2024-11-11 19:44:57,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 19:44:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:44:57,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-11 19:44:57,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:44:57,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-11 19:44:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:44:58,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:45:02,369 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 23 treesize of output 21 [2024-11-11 19:45:02,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-11 19:45:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-11 19:45:02,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736344550] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:45:02,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:45:02,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 19 [2024-11-11 19:45:02,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135072091] [2024-11-11 19:45:02,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:45:02,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-11 19:45:02,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:45:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-11 19:45:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=276, Unknown=1, NotChecked=0, Total=342 [2024-11-11 19:45:02,431 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 19 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-11 19:45:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:45:02,943 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2024-11-11 19:45:02,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-11 19:45:02,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2024-11-11 19:45:02,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:45:02,944 INFO L225 Difference]: With dead ends: 78 [2024-11-11 19:45:02,944 INFO L226 Difference]: Without dead ends: 53 [2024-11-11 19:45:02,945 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=159, Invalid=596, Unknown=1, NotChecked=0, Total=756 [2024-11-11 19:45:02,945 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 19:45:02,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 136 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 19:45:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-11 19:45:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2024-11-11 19:45:02,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-11 19:45:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-11-11 19:45:02,959 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2024-11-11 19:45:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:45:02,961 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-11-11 19:45:02,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-11 19:45:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-11-11 19:45:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-11 19:45:02,961 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:45:02,961 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:45:02,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-11 19:45:03,162 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,SelfDestructingSolverStorable2 [2024-11-11 19:45:03,163 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:45:03,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:45:03,163 INFO L85 PathProgramCache]: Analyzing trace with hash 937647271, now seen corresponding path program 1 times [2024-11-11 19:45:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:45:03,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229153592] [2024-11-11 19:45:03,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:45:03,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:45:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:03,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-11 19:45:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:03,295 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-11 19:45:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-11 19:45:03,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:45:03,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229153592] [2024-11-11 19:45:03,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229153592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:45:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333456687] [2024-11-11 19:45:03,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:45:03,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:45:03,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:45:03,301 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) [2024-11-11 19:45:03,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 19:45:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:03,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-11 19:45:03,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:45:03,357 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 [2024-11-11 19:45:03,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-11 19:45:03,432 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:45:03,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-11-11 19:45:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 19:45:03,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:45:05,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 98 [2024-11-11 19:45:05,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:45:05,332 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 528 treesize of output 518 [2024-11-11 19:45:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-11 19:45:05,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333456687] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:45:05,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:45:05,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 20] total 37 [2024-11-11 19:45:05,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416818263] [2024-11-11 19:45:05,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:45:05,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-11 19:45:05,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:45:05,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-11 19:45:05,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2024-11-11 19:45:05,454 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 37 states, 33 states have (on average 2.121212121212121) internal successors, (70), 36 states have internal predecessors, (70), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-11 19:45:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:45:07,752 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2024-11-11 19:45:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-11 19:45:07,753 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 33 states have (on average 2.121212121212121) internal successors, (70), 36 states have internal predecessors, (70), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 34 [2024-11-11 19:45:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:45:07,754 INFO L225 Difference]: With dead ends: 119 [2024-11-11 19:45:07,754 INFO L226 Difference]: Without dead ends: 86 [2024-11-11 19:45:07,755 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=645, Invalid=2547, Unknown=0, NotChecked=0, Total=3192 [2024-11-11 19:45:07,756 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 130 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-11 19:45:07,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 148 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-11 19:45:07,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-11 19:45:07,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2024-11-11 19:45:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 57 states have internal predecessors, (62), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-11 19:45:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2024-11-11 19:45:07,775 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 34 [2024-11-11 19:45:07,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:45:07,775 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2024-11-11 19:45:07,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 33 states have (on average 2.121212121212121) internal successors, (70), 36 states have internal predecessors, (70), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-11 19:45:07,776 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2024-11-11 19:45:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-11 19:45:07,781 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:45:07,781 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 19:45:07,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-11 19:45:07,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:45:07,981 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:45:07,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:45:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash 642599984, now seen corresponding path program 2 times [2024-11-11 19:45:07,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:45:07,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219974507] [2024-11-11 19:45:07,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:45:07,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:45:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:08,108 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-11 19:45:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:08,111 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-11 19:45:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:08,118 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-11 19:45:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-11 19:45:08,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:45:08,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219974507] [2024-11-11 19:45:08,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219974507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:45:08,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866992527] [2024-11-11 19:45:08,121 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-11 19:45:08,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:45:08,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:45:08,123 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) [2024-11-11 19:45:08,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 19:45:08,185 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-11 19:45:08,186 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:45:08,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-11 19:45:08,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:45:08,223 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 [2024-11-11 19:45:08,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-11 19:45:08,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:45:08,286 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 [2024-11-11 19:45:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-11 19:45:08,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:45:15,753 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 155 treesize of output 149 [2024-11-11 19:45:15,764 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:45:15,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 922 treesize of output 902 [2024-11-11 19:45:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-11 19:45:16,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866992527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:45:16,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:45:16,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 21, 26] total 50 [2024-11-11 19:45:16,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050298976] [2024-11-11 19:45:16,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:45:16,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-11 19:45:16,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:45:16,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-11 19:45:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2024-11-11 19:45:16,036 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 50 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 48 states have internal predecessors, (90), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-11 19:45:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:45:25,818 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2024-11-11 19:45:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-11 19:45:25,819 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 48 states have internal predecessors, (90), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2024-11-11 19:45:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:45:25,820 INFO L225 Difference]: With dead ends: 157 [2024-11-11 19:45:25,820 INFO L226 Difference]: Without dead ends: 99 [2024-11-11 19:45:25,821 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=1013, Invalid=4537, Unknown=0, NotChecked=0, Total=5550 [2024-11-11 19:45:25,822 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-11 19:45:25,822 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 249 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-11 19:45:25,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-11 19:45:25,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2024-11-11 19:45:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 64 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 19:45:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2024-11-11 19:45:25,842 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 45 [2024-11-11 19:45:25,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:45:25,842 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2024-11-11 19:45:25,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 48 states have internal predecessors, (90), 9 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-11 19:45:25,843 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2024-11-11 19:45:25,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-11 19:45:25,844 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:45:25,844 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-11 19:45:25,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 19:45:26,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:45:26,044 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:45:26,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:45:26,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1893600441, now seen corresponding path program 3 times [2024-11-11 19:45:26,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:45:26,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403694743] [2024-11-11 19:45:26,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:45:26,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:45:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:26,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-11 19:45:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:26,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-11 19:45:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:26,206 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-11 19:45:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:26,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-11 19:45:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-11 19:45:26,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:45:26,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403694743] [2024-11-11 19:45:26,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403694743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:45:26,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173844200] [2024-11-11 19:45:26,210 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-11 19:45:26,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:45:26,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:45:26,211 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) [2024-11-11 19:45:26,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 19:45:26,408 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-11 19:45:26,408 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:45:26,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-11 19:45:26,411 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:45:26,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-11 19:45:26,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-11 19:45:26,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:45:26,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2024-11-11 19:45:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-11 19:45:27,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:45:29,792 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 152 treesize of output 146 [2024-11-11 19:45:29,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:45:29,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1749 treesize of output 1709 [2024-11-11 19:45:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-11 19:45:30,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173844200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:45:30,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:45:30,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 23, 28] total 52 [2024-11-11 19:45:30,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103860831] [2024-11-11 19:45:30,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:45:30,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-11 19:45:30,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:45:30,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-11 19:45:30,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2024-11-11 19:45:30,354 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 52 states, 46 states have (on average 2.152173913043478) internal successors, (99), 50 states have internal predecessors, (99), 11 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-11 19:45:49,324 WARN L286 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 89 DAG size of output: 89 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-11 19:45:54,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 19:45:54,465 INFO L93 Difference]: Finished difference Result 194 states and 223 transitions. [2024-11-11 19:45:54,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-11 19:45:54,465 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 46 states have (on average 2.152173913043478) internal successors, (99), 50 states have internal predecessors, (99), 11 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 56 [2024-11-11 19:45:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 19:45:54,467 INFO L225 Difference]: With dead ends: 194 [2024-11-11 19:45:54,467 INFO L226 Difference]: Without dead ends: 129 [2024-11-11 19:45:54,469 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=1197, Invalid=5775, Unknown=0, NotChecked=0, Total=6972 [2024-11-11 19:45:54,469 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 219 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-11 19:45:54,469 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 282 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-11 19:45:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-11 19:45:54,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 119. [2024-11-11 19:45:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 97 states have internal predecessors, (106), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-11 19:45:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2024-11-11 19:45:54,497 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 56 [2024-11-11 19:45:54,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 19:45:54,498 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2024-11-11 19:45:54,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 46 states have (on average 2.152173913043478) internal successors, (99), 50 states have internal predecessors, (99), 11 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-11-11 19:45:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2024-11-11 19:45:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-11 19:45:54,499 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 19:45:54,499 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-11 19:45:54,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-11 19:45:54,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:45:54,700 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 19:45:54,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 19:45:54,700 INFO L85 PathProgramCache]: Analyzing trace with hash 268052240, now seen corresponding path program 4 times [2024-11-11 19:45:54,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 19:45:54,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259831457] [2024-11-11 19:45:54,700 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 19:45:54,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 19:45:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:54,854 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-11 19:45:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:54,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-11 19:45:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:54,859 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-11 19:45:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:54,861 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-11-11 19:45:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:54,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-11-11 19:45:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 19:45:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-11 19:45:54,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 19:45:54,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259831457] [2024-11-11 19:45:54,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259831457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 19:45:54,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741502618] [2024-11-11 19:45:54,865 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-11 19:45:54,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 19:45:54,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 19:45:54,866 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) [2024-11-11 19:45:54,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-11 19:45:54,923 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-11 19:45:54,923 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-11 19:45:54,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-11 19:45:54,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 19:45:54,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-11 19:45:54,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-11 19:45:54,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:45:54,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2024-11-11 19:45:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-11 19:45:55,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 19:46:00,350 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 155 treesize of output 149 [2024-11-11 19:46:00,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 19:46:00,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2482 treesize of output 2426 [2024-11-11 19:46:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 29 proven. 88 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-11 19:46:00,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741502618] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 19:46:00,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-11 19:46:00,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 25, 30] total 56 [2024-11-11 19:46:00,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180145822] [2024-11-11 19:46:00,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-11 19:46:00,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-11 19:46:00,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 19:46:00,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-11 19:46:00,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2024-11-11 19:46:00,857 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand has 56 states, 50 states have (on average 2.22) internal successors, (111), 54 states have internal predecessors, (111), 13 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-11-11 19:46:14,757 WARN L286 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 129 DAG size of output: 128 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-11 19:46:35,965 WARN L286 SmtUtils]: Spent 14.60s on a formula simplification. DAG size of input: 120 DAG size of output: 119 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)