./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_03.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_03.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 52914d7c178662889d0d1af19e507e51f5067aa3fe7ebdb303f414406fa46b67 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:35:15,365 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:35:15,442 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:35:15,448 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:35:15,448 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:35:15,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:35:15,475 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:35:15,475 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:35:15,476 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:35:15,476 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:35:15,476 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:35:15,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:35:15,478 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:35:15,479 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:35:15,481 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:35:15,481 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:35:15,481 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:35:15,482 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:35:15,482 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:35:15,482 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:35:15,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:35:15,486 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:35:15,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:35:15,487 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:35:15,487 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:35:15,487 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:35:15,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:35:15,488 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:35:15,488 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:35:15,488 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:35:15,488 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:35:15,489 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:35:15,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:35:15,489 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:35:15,489 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:35:15,490 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:35:15,490 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:35:15,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:35:15,490 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:35:15,491 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:35:15,491 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:35:15,492 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:35:15,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52914d7c178662889d0d1af19e507e51f5067aa3fe7ebdb303f414406fa46b67 [2024-10-12 14:35:15,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:35:15,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:35:15,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:35:15,751 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:35:15,751 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:35:15,752 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_03.i [2024-10-12 14:35:17,139 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:35:17,307 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:35:17,307 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_03.i [2024-10-12 14:35:17,314 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797491a57/75bbf0d35568442e99500908d6089416/FLAG06d036281 [2024-10-12 14:35:17,327 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/797491a57/75bbf0d35568442e99500908d6089416 [2024-10-12 14:35:17,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:35:17,331 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:35:17,333 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:35:17,334 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:35:17,339 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:35:17,340 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,341 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9de7156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17, skipping insertion in model container [2024-10-12 14:35:17,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,360 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:35:17,530 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_03.i[814,827] [2024-10-12 14:35:17,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:35:17,548 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:35:17,557 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_03.i[814,827] [2024-10-12 14:35:17,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:35:17,578 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:35:17,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17 WrapperNode [2024-10-12 14:35:17,579 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:35:17,580 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:35:17,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:35:17,581 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:35:17,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,592 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,606 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2024-10-12 14:35:17,606 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:35:17,607 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:35:17,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:35:17,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:35:17,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,617 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,649 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 2, 3]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-12 14:35:17,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,658 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,666 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,667 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,669 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,673 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:35:17,676 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:35:17,676 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:35:17,676 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:35:17,677 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (1/1) ... [2024-10-12 14:35:17,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:35:17,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:35:17,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 14:35:17,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 14:35:17,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:35:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:35:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:35:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-12 14:35:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 14:35:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:35:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:35:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-12 14:35:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:35:17,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:35:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:35:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:35:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-12 14:35:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 14:35:17,874 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:35:17,876 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:35:18,017 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-12 14:35:18,017 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:35:18,059 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:35:18,059 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 14:35:18,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:35:18 BoogieIcfgContainer [2024-10-12 14:35:18,060 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:35:18,062 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:35:18,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:35:18,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:35:18,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:35:17" (1/3) ... [2024-10-12 14:35:18,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1faf74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:35:18, skipping insertion in model container [2024-10-12 14:35:18,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:35:17" (2/3) ... [2024-10-12 14:35:18,069 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1faf74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:35:18, skipping insertion in model container [2024-10-12 14:35:18,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:35:18" (3/3) ... [2024-10-12 14:35:18,071 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_03.i [2024-10-12 14:35:18,086 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:35:18,086 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:35:18,147 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:35:18,156 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;@1992e240, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:35:18,157 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:35:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:18,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-12 14:35:18,166 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:35:18,166 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:35:18,167 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:35:18,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:35:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1148868036, now seen corresponding path program 1 times [2024-10-12 14:35:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:35:18,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417992381] [2024-10-12 14:35:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:35:18,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:35:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:35:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:35:18,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:35:18,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417992381] [2024-10-12 14:35:18,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417992381] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:35:18,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:35:18,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:35:18,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609891830] [2024-10-12 14:35:18,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:35:18,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:35:18,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:35:18,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:35:18,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:35:18,455 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:35:18,511 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2024-10-12 14:35:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:35:18,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-12 14:35:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:35:18,520 INFO L225 Difference]: With dead ends: 23 [2024-10-12 14:35:18,520 INFO L226 Difference]: Without dead ends: 11 [2024-10-12 14:35:18,522 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:35:18,527 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:35:18,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:35:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-10-12 14:35:18,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-10-12 14:35:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2024-10-12 14:35:18,558 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2024-10-12 14:35:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:35:18,558 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2024-10-12 14:35:18,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2024-10-12 14:35:18,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-12 14:35:18,559 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:35:18,559 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:35:18,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:35:18,560 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:35:18,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:35:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash -790446873, now seen corresponding path program 1 times [2024-10-12 14:35:18,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:35:18,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620606615] [2024-10-12 14:35:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:35:18,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:35:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:35:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:35:18,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:35:18,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620606615] [2024-10-12 14:35:18,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620606615] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:35:18,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176144377] [2024-10-12 14:35:18,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:35:18,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:35:18,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:35:18,704 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:35:18,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:35:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:35:18,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-12 14:35:18,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:35:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:35:18,794 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:35:18,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176144377] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:35:18,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:35:18,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2024-10-12 14:35:18,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107532341] [2024-10-12 14:35:18,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:35:18,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:35:18,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:35:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:35:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:35:18,799 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:35:18,830 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-10-12 14:35:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:35:18,830 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-12 14:35:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:35:18,831 INFO L225 Difference]: With dead ends: 23 [2024-10-12 14:35:18,831 INFO L226 Difference]: Without dead ends: 17 [2024-10-12 14:35:18,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-12 14:35:18,833 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:35:18,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:35:18,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-10-12 14:35:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2024-10-12 14:35:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2024-10-12 14:35:18,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2024-10-12 14:35:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:35:18,840 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2024-10-12 14:35:18,840 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2024-10-12 14:35:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-12 14:35:18,841 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:35:18,842 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:35:18,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-12 14:35:19,045 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 [2024-10-12 14:35:19,046 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:35:19,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:35:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1317396867, now seen corresponding path program 1 times [2024-10-12 14:35:19,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:35:19,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348547021] [2024-10-12 14:35:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:35:19,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:35:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:35:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:35:19,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:35:19,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348547021] [2024-10-12 14:35:19,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348547021] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:35:19,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260441091] [2024-10-12 14:35:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:35:19,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:35:19,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:35:19,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:35:19,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:35:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:35:19,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-12 14:35:19,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:35:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:35:19,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:35:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:35:19,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260441091] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:35:19,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:35:19,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-12 14:35:19,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350427635] [2024-10-12 14:35:19,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:35:19,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-12 14:35:19,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:35:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-12 14:35:19,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:35:19,268 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:19,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:35:19,332 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2024-10-12 14:35:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-12 14:35:19,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-12 14:35:19,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:35:19,333 INFO L225 Difference]: With dead ends: 35 [2024-10-12 14:35:19,334 INFO L226 Difference]: Without dead ends: 26 [2024-10-12 14:35:19,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-12 14:35:19,336 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:35:19,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:35:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-12 14:35:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2024-10-12 14:35:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-10-12 14:35:19,342 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2024-10-12 14:35:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:35:19,343 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-10-12 14:35:19,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-10-12 14:35:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-12 14:35:19,344 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:35:19,344 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:35:19,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-12 14:35:19,544 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 [2024-10-12 14:35:19,545 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:35:19,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:35:19,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1476057404, now seen corresponding path program 2 times [2024-10-12 14:35:19,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:35:19,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907849844] [2024-10-12 14:35:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:35:19,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:35:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:35:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-12 14:35:19,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:35:19,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907849844] [2024-10-12 14:35:19,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907849844] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:35:19,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391251212] [2024-10-12 14:35:19,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:35:19,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:35:19,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:35:19,707 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:35:19,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:35:19,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:35:19,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:35:19,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-12 14:35:19,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:35:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 14:35:19,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:35:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-12 14:35:19,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391251212] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:35:19,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:35:19,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-10-12 14:35:19,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058006489] [2024-10-12 14:35:19,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:35:19,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-12 14:35:19,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:35:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-12 14:35:19,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:35:19,901 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:35:19,993 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-10-12 14:35:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-12 14:35:19,994 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-10-12 14:35:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:35:19,995 INFO L225 Difference]: With dead ends: 61 [2024-10-12 14:35:19,995 INFO L226 Difference]: Without dead ends: 51 [2024-10-12 14:35:19,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2024-10-12 14:35:19,996 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:35:19,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 31 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:35:19,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-12 14:35:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2024-10-12 14:35:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-10-12 14:35:20,005 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2024-10-12 14:35:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:35:20,005 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-10-12 14:35:20,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:20,005 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-10-12 14:35:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-12 14:35:20,006 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:35:20,006 INFO L215 NwaCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:35:20,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 14:35:20,206 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 [2024-10-12 14:35:20,207 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:35:20,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:35:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash 92870755, now seen corresponding path program 3 times [2024-10-12 14:35:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:35:20,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710839639] [2024-10-12 14:35:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:35:20,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:35:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:35:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-12 14:35:20,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:35:20,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710839639] [2024-10-12 14:35:20,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710839639] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:35:20,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016975781] [2024-10-12 14:35:20,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:35:20,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:35:20,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:35:20,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:35:20,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:35:20,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-12 14:35:20,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:35:20,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 14:35:20,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:35:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-12 14:35:20,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:35:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-12 14:35:20,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016975781] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:35:20,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:35:20,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-10-12 14:35:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749771811] [2024-10-12 14:35:20,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:35:20,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-12 14:35:20,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:35:20,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-12 14:35:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-10-12 14:35:20,651 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:35:20,755 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2024-10-12 14:35:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-12 14:35:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-10-12 14:35:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:35:20,757 INFO L225 Difference]: With dead ends: 103 [2024-10-12 14:35:20,757 INFO L226 Difference]: Without dead ends: 90 [2024-10-12 14:35:20,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-10-12 14:35:20,758 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 96 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:35:20,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 40 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:35:20,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-12 14:35:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 34. [2024-10-12 14:35:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2024-10-12 14:35:20,765 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2024-10-12 14:35:20,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:35:20,765 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2024-10-12 14:35:20,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2024-10-12 14:35:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-12 14:35:20,766 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:35:20,766 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:35:20,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-12 14:35:20,967 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 [2024-10-12 14:35:20,967 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:35:20,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:35:20,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1682876028, now seen corresponding path program 4 times [2024-10-12 14:35:20,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:35:20,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669433298] [2024-10-12 14:35:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:35:20,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:35:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:35:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-12 14:35:21,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:35:21,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669433298] [2024-10-12 14:35:21,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669433298] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:35:21,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245053617] [2024-10-12 14:35:21,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:35:21,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:35:21,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:35:21,299 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:35:21,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:35:21,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:35:21,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:35:21,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-12 14:35:21,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:35:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-12 14:35:21,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:35:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-12 14:35:21,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245053617] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:35:21,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:35:21,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2024-10-12 14:35:21,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641841616] [2024-10-12 14:35:21,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:35:21,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-12 14:35:21,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:35:21,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-12 14:35:21,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 14:35:21,802 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:35:22,055 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2024-10-12 14:35:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-12 14:35:22,056 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-10-12 14:35:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:35:22,057 INFO L225 Difference]: With dead ends: 169 [2024-10-12 14:35:22,059 INFO L226 Difference]: Without dead ends: 149 [2024-10-12 14:35:22,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=702, Invalid=704, Unknown=0, NotChecked=0, Total=1406 [2024-10-12 14:35:22,061 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 192 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 14:35:22,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 76 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 14:35:22,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-10-12 14:35:22,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 63. [2024-10-12 14:35:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2024-10-12 14:35:22,076 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 32 [2024-10-12 14:35:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:35:22,076 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2024-10-12 14:35:22,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:35:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2024-10-12 14:35:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-12 14:35:22,079 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:35:22,079 INFO L215 NwaCegarLoop]: trace histogram [35, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:35:22,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 14:35:22,280 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 [2024-10-12 14:35:22,280 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:35:22,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:35:22,281 INFO L85 PathProgramCache]: Analyzing trace with hash -435804665, now seen corresponding path program 5 times [2024-10-12 14:35:22,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:35:22,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956431502] [2024-10-12 14:35:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:35:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:35:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:35:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2024-10-12 14:35:22,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:35:22,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956431502] [2024-10-12 14:35:22,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956431502] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:35:22,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252277525] [2024-10-12 14:35:22,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:35:22,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:35:22,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:35:22,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:35:22,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process