./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sanfoundry_02_ground.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 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 08:49:22,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 08:49:22,205 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 08:49:22,212 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 08:49:22,217 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 08:49:22,256 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 08:49:22,257 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 08:49:22,257 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 08:49:22,258 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 08:49:22,258 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 08:49:22,259 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 08:49:22,259 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 08:49:22,260 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 08:49:22,263 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 08:49:22,263 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 08:49:22,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 08:49:22,264 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 08:49:22,264 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 08:49:22,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 08:49:22,265 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 08:49:22,265 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 08:49:22,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 08:49:22,270 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 08:49:22,270 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 08:49:22,270 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 08:49:22,271 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 08:49:22,271 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 08:49:22,271 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 08:49:22,271 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 08:49:22,271 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 08:49:22,272 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 08:49:22,272 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 08:49:22,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 08:49:22,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 08:49:22,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 08:49:22,277 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 08:49:22,278 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 08:49:22,278 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 08:49:22,278 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 08:49:22,278 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 08:49:22,278 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 08:49:22,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 08:49:22,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a6236bdd88fd6afaea18904cacfb3d20cec5c672e4775ed237e350d1a6fc96b [2024-11-18 08:49:22,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 08:49:22,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 08:49:22,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 08:49:22,556 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 08:49:22,557 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 08:49:22,558 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2024-11-18 08:49:23,965 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 08:49:24,166 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 08:49:24,166 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2024-11-18 08:49:24,175 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c68f2797f/d9acfe12a4b04b9c8c134049bad14d99/FLAG6920be53d [2024-11-18 08:49:24,547 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c68f2797f/d9acfe12a4b04b9c8c134049bad14d99 [2024-11-18 08:49:24,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 08:49:24,550 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 08:49:24,552 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 08:49:24,552 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 08:49:24,556 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 08:49:24,557 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,558 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40263077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24, skipping insertion in model container [2024-11-18 08:49:24,558 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,581 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 08:49:24,760 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i[813,826] [2024-11-18 08:49:24,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 08:49:24,785 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 08:49:24,796 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i[813,826] [2024-11-18 08:49:24,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 08:49:24,845 INFO L204 MainTranslator]: Completed translation [2024-11-18 08:49:24,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24 WrapperNode [2024-11-18 08:49:24,846 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 08:49:24,847 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 08:49:24,847 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 08:49:24,847 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 08:49:24,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,882 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,908 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 93 [2024-11-18 08:49:24,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 08:49:24,909 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 08:49:24,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 08:49:24,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 08:49:24,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,922 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,933 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 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]. [2024-11-18 08:49:24,934 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,934 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,940 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,945 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,946 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,947 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,949 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 08:49:24,950 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 08:49:24,950 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 08:49:24,950 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 08:49:24,951 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (1/1) ... [2024-11-18 08:49:24,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 08:49:24,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:24,981 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) [2024-11-18 08:49:24,983 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 [2024-11-18 08:49:25,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 08:49:25,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 08:49:25,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 08:49:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 08:49:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 08:49:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 08:49:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 08:49:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 08:49:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 08:49:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 08:49:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-18 08:49:25,028 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-18 08:49:25,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 08:49:25,099 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 08:49:25,101 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 08:49:25,275 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-18 08:49:25,276 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 08:49:25,288 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 08:49:25,289 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-18 08:49:25,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:49:25 BoogieIcfgContainer [2024-11-18 08:49:25,289 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 08:49:25,292 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 08:49:25,292 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 08:49:25,295 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 08:49:25,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:49:24" (1/3) ... [2024-11-18 08:49:25,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a7b903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:49:25, skipping insertion in model container [2024-11-18 08:49:25,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:49:24" (2/3) ... [2024-11-18 08:49:25,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a7b903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:49:25, skipping insertion in model container [2024-11-18 08:49:25,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:49:25" (3/3) ... [2024-11-18 08:49:25,298 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2024-11-18 08:49:25,316 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 08:49:25,316 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 08:49:25,367 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 08:49:25,374 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;@199f9109, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 08:49:25,374 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 08:49:25,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 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) [2024-11-18 08:49:25,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-18 08:49:25,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:25,384 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:25,385 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:25,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:25,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2067048339, now seen corresponding path program 1 times [2024-11-18 08:49:25,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:25,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740722368] [2024-11-18 08:49:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 08:49:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:25,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740722368] [2024-11-18 08:49:25,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740722368] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:25,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 08:49:25,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 08:49:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563442739] [2024-11-18 08:49:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:25,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 08:49:25,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:25,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 08:49:25,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 08:49:25,632 INFO L87 Difference]: Start difference. First operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 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 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-18 08:49:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:25,695 INFO L93 Difference]: Finished difference Result 62 states and 90 transitions. [2024-11-18 08:49:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 08:49:25,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2024-11-18 08:49:25,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:25,706 INFO L225 Difference]: With dead ends: 62 [2024-11-18 08:49:25,706 INFO L226 Difference]: Without dead ends: 30 [2024-11-18 08:49:25,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 08:49:25,712 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 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 [2024-11-18 08:49:25,713 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:49:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-18 08:49:25,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2024-11-18 08:49:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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) [2024-11-18 08:49:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-11-18 08:49:25,746 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 13 [2024-11-18 08:49:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:25,747 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-11-18 08:49:25,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-11-18 08:49:25,748 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-11-18 08:49:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-18 08:49:25,749 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:25,749 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:25,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 08:49:25,750 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:25,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:25,751 INFO L85 PathProgramCache]: Analyzing trace with hash -431376725, now seen corresponding path program 1 times [2024-11-18 08:49:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:25,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451518352] [2024-11-18 08:49:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 08:49:25,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:25,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451518352] [2024-11-18 08:49:25,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451518352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:25,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110661923] [2024-11-18 08:49:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:25,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:25,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:25,890 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) [2024-11-18 08:49:25,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 08:49:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:25,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-18 08:49:25,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 08:49:26,018 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 08:49:26,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110661923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 08:49:26,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 08:49:26,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-18 08:49:26,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597016792] [2024-11-18 08:49:26,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 08:49:26,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 08:49:26,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:26,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 08:49:26,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-18 08:49:26,022 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-11-18 08:49:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:26,064 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2024-11-18 08:49:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 08:49:26,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 15 [2024-11-18 08:49:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:26,066 INFO L225 Difference]: With dead ends: 51 [2024-11-18 08:49:26,067 INFO L226 Difference]: Without dead ends: 34 [2024-11-18 08:49:26,067 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-18 08:49:26,068 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:26,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 54 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 08:49:26,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-18 08:49:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-11-18 08:49:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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) [2024-11-18 08:49:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2024-11-18 08:49:26,082 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2024-11-18 08:49:26,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:26,083 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2024-11-18 08:49:26,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-11-18 08:49:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2024-11-18 08:49:26,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-18 08:49:26,084 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:26,084 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:26,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 08:49:26,285 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 [2024-11-18 08:49:26,286 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:26,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:26,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1763712837, now seen corresponding path program 1 times [2024-11-18 08:49:26,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:26,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142917957] [2024-11-18 08:49:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:26,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 08:49:26,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:26,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142917957] [2024-11-18 08:49:26,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142917957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:26,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009751595] [2024-11-18 08:49:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 08:49:26,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:26,391 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) [2024-11-18 08:49:26,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 08:49:26,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 08:49:26,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-18 08:49:26,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 08:49:26,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-18 08:49:26,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009751595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:26,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:26,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-18 08:49:26,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394986235] [2024-11-18 08:49:26,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:26,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 08:49:26,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:26,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 08:49:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 08:49:26,556 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2024-11-18 08:49:26,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:26,637 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2024-11-18 08:49:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 08:49:26,638 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 18 [2024-11-18 08:49:26,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:26,640 INFO L225 Difference]: With dead ends: 65 [2024-11-18 08:49:26,640 INFO L226 Difference]: Without dead ends: 40 [2024-11-18 08:49:26,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 08:49:26,643 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:26,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 57 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:49:26,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-18 08:49:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-18 08:49:26,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 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) [2024-11-18 08:49:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2024-11-18 08:49:26,659 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 18 [2024-11-18 08:49:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:26,659 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2024-11-18 08:49:26,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2024-11-18 08:49:26,660 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2024-11-18 08:49:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-18 08:49:26,660 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:26,660 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:26,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:26,861 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 [2024-11-18 08:49:26,861 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:26,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:26,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1149964965, now seen corresponding path program 2 times [2024-11-18 08:49:26,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:26,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388979226] [2024-11-18 08:49:26,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:49:26,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:26,915 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:49:26,917 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-18 08:49:27,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:27,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388979226] [2024-11-18 08:49:27,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388979226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:27,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115799008] [2024-11-18 08:49:27,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 08:49:27,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:27,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:27,040 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) [2024-11-18 08:49:27,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 08:49:27,122 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 08:49:27,122 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:27,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 08:49:27,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:27,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 08:49:27,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115799008] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:27,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:27,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 13 [2024-11-18 08:49:27,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627241475] [2024-11-18 08:49:27,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:27,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-18 08:49:27,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-18 08:49:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2024-11-18 08:49:27,262 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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) [2024-11-18 08:49:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:27,395 INFO L93 Difference]: Finished difference Result 105 states and 148 transitions. [2024-11-18 08:49:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 08:49:27,396 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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 27 [2024-11-18 08:49:27,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:27,397 INFO L225 Difference]: With dead ends: 105 [2024-11-18 08:49:27,399 INFO L226 Difference]: Without dead ends: 76 [2024-11-18 08:49:27,399 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=80, Unknown=0, NotChecked=0, Total=156 [2024-11-18 08:49:27,400 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 112 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:27,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 86 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 08:49:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-18 08:49:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-18 08:49:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 72 states have internal predecessors, (94), 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) [2024-11-18 08:49:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2024-11-18 08:49:27,414 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 27 [2024-11-18 08:49:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:27,414 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2024-11-18 08:49:27,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 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) [2024-11-18 08:49:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2024-11-18 08:49:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-18 08:49:27,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:27,416 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:27,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 08:49:27,619 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 [2024-11-18 08:49:27,620 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:27,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:27,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1960305241, now seen corresponding path program 3 times [2024-11-18 08:49:27,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:27,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608801957] [2024-11-18 08:49:27,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 08:49:27,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:27,714 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-18 08:49:27,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-18 08:49:28,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:28,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608801957] [2024-11-18 08:49:28,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608801957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:28,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885466286] [2024-11-18 08:49:28,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 08:49:28,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:28,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:28,015 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) [2024-11-18 08:49:28,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 08:49:28,126 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-18 08:49:28,127 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:28,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-18 08:49:28,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-18 08:49:28,190 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-18 08:49:28,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885466286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:28,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:28,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-11-18 08:49:28,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883817721] [2024-11-18 08:49:28,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:28,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-18 08:49:28,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:28,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-18 08:49:28,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2024-11-18 08:49:28,393 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 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) [2024-11-18 08:49:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:28,638 INFO L93 Difference]: Finished difference Result 185 states and 266 transitions. [2024-11-18 08:49:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-18 08:49:28,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 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 57 [2024-11-18 08:49:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:28,642 INFO L225 Difference]: With dead ends: 185 [2024-11-18 08:49:28,642 INFO L226 Difference]: Without dead ends: 132 [2024-11-18 08:49:28,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2024-11-18 08:49:28,643 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 184 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:28,645 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 143 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 08:49:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-18 08:49:28,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2024-11-18 08:49:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.328125) internal successors, (170), 128 states have internal predecessors, (170), 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) [2024-11-18 08:49:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 174 transitions. [2024-11-18 08:49:28,665 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 174 transitions. Word has length 57 [2024-11-18 08:49:28,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:28,665 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 174 transitions. [2024-11-18 08:49:28,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 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) [2024-11-18 08:49:28,666 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 174 transitions. [2024-11-18 08:49:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-18 08:49:28,672 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:28,672 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:28,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 08:49:28,872 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 [2024-11-18 08:49:28,873 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:28,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2105629321, now seen corresponding path program 4 times [2024-11-18 08:49:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:28,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665241140] [2024-11-18 08:49:28,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 08:49:28,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:28,954 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 08:49:28,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-11-18 08:49:29,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:29,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665241140] [2024-11-18 08:49:29,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665241140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:29,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270915573] [2024-11-18 08:49:29,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 08:49:29,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:29,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:29,595 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) [2024-11-18 08:49:29,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 08:49:29,724 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 08:49:29,725 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:29,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-18 08:49:29,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-11-18 08:49:29,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-11-18 08:49:30,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270915573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:30,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:30,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 42 [2024-11-18 08:49:30,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849431653] [2024-11-18 08:49:30,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:30,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-18 08:49:30,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-18 08:49:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2024-11-18 08:49:30,463 INFO L87 Difference]: Start difference. First operand 132 states and 174 transitions. Second operand has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 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) [2024-11-18 08:49:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:30,969 INFO L93 Difference]: Finished difference Result 349 states and 514 transitions. [2024-11-18 08:49:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-18 08:49:30,970 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 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 103 [2024-11-18 08:49:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:30,972 INFO L225 Difference]: With dead ends: 349 [2024-11-18 08:49:30,973 INFO L226 Difference]: Without dead ends: 256 [2024-11-18 08:49:30,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2024-11-18 08:49:30,975 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 456 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:30,975 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 187 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 08:49:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-18 08:49:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2024-11-18 08:49:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 252 states have (on average 1.3253968253968254) internal successors, (334), 252 states have internal predecessors, (334), 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) [2024-11-18 08:49:31,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 338 transitions. [2024-11-18 08:49:31,006 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 338 transitions. Word has length 103 [2024-11-18 08:49:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:31,007 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 338 transitions. [2024-11-18 08:49:31,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 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) [2024-11-18 08:49:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 338 transitions. [2024-11-18 08:49:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2024-11-18 08:49:31,014 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:31,014 INFO L215 NwaCegarLoop]: trace histogram [40, 40, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:31,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:31,215 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 [2024-11-18 08:49:31,216 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:31,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:31,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1964533539, now seen corresponding path program 5 times [2024-11-18 08:49:31,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:31,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471968282] [2024-11-18 08:49:31,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 08:49:31,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:31,985 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2024-11-18 08:49:31,986 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3747 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2024-11-18 08:49:33,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:49:33,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471968282] [2024-11-18 08:49:33,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471968282] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:49:33,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123640857] [2024-11-18 08:49:33,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 08:49:33,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:33,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:49:33,904 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) [2024-11-18 08:49:33,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 08:49:43,963 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2024-11-18 08:49:43,963 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:49:43,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-18 08:49:43,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 08:49:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3747 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2024-11-18 08:49:44,154 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 08:49:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3747 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2024-11-18 08:49:46,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123640857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 08:49:46,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 08:49:46,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 43, 43] total 84 [2024-11-18 08:49:46,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567770770] [2024-11-18 08:49:46,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 08:49:46,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-18 08:49:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 08:49:46,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-18 08:49:46,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2024-11-18 08:49:46,249 INFO L87 Difference]: Start difference. First operand 256 states and 338 transitions. Second operand has 84 states, 84 states have (on average 3.5595238095238093) internal successors, (299), 84 states have internal predecessors, (299), 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) [2024-11-18 08:49:47,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 08:49:47,690 INFO L93 Difference]: Finished difference Result 681 states and 1012 transitions. [2024-11-18 08:49:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-18 08:49:47,691 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.5595238095238093) internal successors, (299), 84 states have internal predecessors, (299), 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 207 [2024-11-18 08:49:47,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 08:49:47,694 INFO L225 Difference]: With dead ends: 681 [2024-11-18 08:49:47,694 INFO L226 Difference]: Without dead ends: 508 [2024-11-18 08:49:47,697 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2024-11-18 08:49:47,697 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 1553 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1553 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-18 08:49:47,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1553 Valid, 230 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-18 08:49:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2024-11-18 08:49:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2024-11-18 08:49:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 504 states have (on average 1.3293650793650793) internal successors, (670), 504 states have internal predecessors, (670), 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) [2024-11-18 08:49:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 674 transitions. [2024-11-18 08:49:47,737 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 674 transitions. Word has length 207 [2024-11-18 08:49:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 08:49:47,738 INFO L471 AbstractCegarLoop]: Abstraction has 508 states and 674 transitions. [2024-11-18 08:49:47,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.5595238095238093) internal successors, (299), 84 states have internal predecessors, (299), 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) [2024-11-18 08:49:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 674 transitions. [2024-11-18 08:49:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2024-11-18 08:49:47,750 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 08:49:47,751 INFO L215 NwaCegarLoop]: trace histogram [82, 82, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 08:49:47,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-18 08:49:47,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:49:47,951 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 08:49:47,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 08:49:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2061701431, now seen corresponding path program 6 times [2024-11-18 08:49:47,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 08:49:47,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527911682] [2024-11-18 08:49:47,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 08:49:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 08:49:59,691 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 83 check-sat command(s) [2024-11-18 08:49:59,692 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 08:50:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16284 backedges. 0 proven. 9560 refuted. 0 times theorem prover too weak. 6724 trivial. 0 not checked. [2024-11-18 08:50:05,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 08:50:05,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527911682] [2024-11-18 08:50:05,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527911682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 08:50:05,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019099468] [2024-11-18 08:50:05,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 08:50:05,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 08:50:05,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 08:50:05,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 08:50:05,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process