./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-crafted/bAnd2.i --full-output --preprocessor.use.memory.slicer false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 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 ../../../trunk/examples/svcomp/array-crafted/bAnd2.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 a719405da03132817ea2d2d0b1cf4a57bb1050c6860d4dd23b83fe81ff2289e3 --preprocessor.use.memory.slicer false --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 21:09:12,799 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 21:09:12,876 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 21:09:12,880 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 21:09:12,881 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 21:09:12,911 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 21:09:12,912 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 21:09:12,912 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 21:09:12,913 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 21:09:12,916 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 21:09:12,917 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 21:09:12,917 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 21:09:12,918 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 21:09:12,919 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 21:09:12,919 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 21:09:12,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 21:09:12,920 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 21:09:12,920 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 21:09:12,921 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 21:09:12,921 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 21:09:12,921 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 21:09:12,921 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 21:09:12,922 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 21:09:12,922 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 21:09:12,922 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 21:09:12,922 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 21:09:12,923 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 21:09:12,923 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 21:09:12,923 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 21:09:12,924 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 21:09:12,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 21:09:12,925 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:09:12,925 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 21:09:12,925 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 21:09:12,925 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 21:09:12,926 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 21:09:12,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 21:09:12,926 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 21:09:12,926 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 21:09:12,926 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 21:09:12,927 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 21:09:12,927 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 21:09:12,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a719405da03132817ea2d2d0b1cf4a57bb1050c6860d4dd23b83fe81ff2289e3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> false [2023-11-22 21:09:13,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 21:09:13,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 21:09:13,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 21:09:13,206 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 21:09:13,206 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 21:09:13,207 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd2.i [2023-11-22 21:09:14,371 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 21:09:14,567 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 21:09:14,568 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd2.i [2023-11-22 21:09:14,575 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9b9696b4/4176200bf11f4acbacdda1f420971ad2/FLAG5e996a9af [2023-11-22 21:09:14,589 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9b9696b4/4176200bf11f4acbacdda1f420971ad2 [2023-11-22 21:09:14,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 21:09:14,593 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 21:09:14,595 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 21:09:14,595 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 21:09:14,599 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 21:09:14,600 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663ad0f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14, skipping insertion in model container [2023-11-22 21:09:14,601 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,624 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 21:09:14,798 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd2.i[1296,1309] [2023-11-22 21:09:14,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:09:14,814 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 21:09:14,832 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd2.i[1296,1309] [2023-11-22 21:09:14,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 21:09:14,846 INFO L206 MainTranslator]: Completed translation [2023-11-22 21:09:14,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14 WrapperNode [2023-11-22 21:09:14,847 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 21:09:14,848 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 21:09:14,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 21:09:14,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 21:09:14,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,864 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,880 INFO L138 Inliner]: procedures = 16, calls = 31, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-11-22 21:09:14,883 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 21:09:14,883 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 21:09:14,884 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 21:09:14,884 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 21:09:14,891 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,899 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,904 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,906 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,907 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,909 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 21:09:14,910 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 21:09:14,910 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 21:09:14,910 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 21:09:14,911 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (1/1) ... [2023-11-22 21:09:14,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 21:09:14,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:14,987 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 21:09:15,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 21:09:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 21:09:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 21:09:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 21:09:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 21:09:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2023-11-22 21:09:15,036 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2023-11-22 21:09:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 21:09:15,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 21:09:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-22 21:09:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 21:09:15,099 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 21:09:15,100 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 21:09:15,288 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 21:09:15,337 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 21:09:15,347 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-22 21:09:15,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:09:15 BoogieIcfgContainer [2023-11-22 21:09:15,348 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 21:09:15,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 21:09:15,350 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 21:09:15,353 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 21:09:15,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:09:14" (1/3) ... [2023-11-22 21:09:15,355 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37043fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:09:15, skipping insertion in model container [2023-11-22 21:09:15,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:09:14" (2/3) ... [2023-11-22 21:09:15,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37043fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:09:15, skipping insertion in model container [2023-11-22 21:09:15,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:09:15" (3/3) ... [2023-11-22 21:09:15,358 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd2.i [2023-11-22 21:09:15,374 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 21:09:15,375 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 21:09:15,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 21:09:15,427 INFO L357 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, mHoare=true, 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;@7498ca0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 21:09:15,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 21:09:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 21:09:15,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:15,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:15,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:15,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:15,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1143770574, now seen corresponding path program 1 times [2023-11-22 21:09:15,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:15,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906294846] [2023-11-22 21:09:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:15,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:15,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-22 21:09:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:15,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-22 21:09:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:15,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-22 21:09:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:09:15,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:15,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906294846] [2023-11-22 21:09:15,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906294846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:15,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529704578] [2023-11-22 21:09:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:15,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:15,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:15,820 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) [2023-11-22 21:09:15,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 21:09:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:15,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:09:15,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 21:09:15,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:09:15,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529704578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:09:15,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:09:15,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-22 21:09:15,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733339370] [2023-11-22 21:09:15,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:09:15,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:09:15,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:15,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:09:15,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:09:16,001 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 21:09:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:16,042 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2023-11-22 21:09:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:09:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-22 21:09:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:16,050 INFO L225 Difference]: With dead ends: 45 [2023-11-22 21:09:16,050 INFO L226 Difference]: Without dead ends: 22 [2023-11-22 21:09:16,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:09:16,057 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 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 [2023-11-22 21:09:16,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:16,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-22 21:09:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-22 21:09:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-11-22 21:09:16,094 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 25 [2023-11-22 21:09:16,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:16,095 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-11-22 21:09:16,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-22 21:09:16,096 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-11-22 21:09:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-22 21:09:16,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:16,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:16,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:16,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-22 21:09:16,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:16,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:16,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1668871841, now seen corresponding path program 1 times [2023-11-22 21:09:16,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:16,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98891161] [2023-11-22 21:09:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:16,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:16,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:09:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:16,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-11-22 21:09:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:16,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-11-22 21:09:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-22 21:09:16,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:16,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98891161] [2023-11-22 21:09:16,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98891161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:16,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469225035] [2023-11-22 21:09:16,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:16,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:16,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:16,490 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) [2023-11-22 21:09:16,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 21:09:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:16,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:09:16,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-22 21:09:16,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:09:16,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469225035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:09:16,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:09:16,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-11-22 21:09:16,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582074082] [2023-11-22 21:09:16,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:09:16,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:09:16,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:09:16,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:09:16,598 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 21:09:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:16,621 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2023-11-22 21:09:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:09:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-22 21:09:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:16,623 INFO L225 Difference]: With dead ends: 43 [2023-11-22 21:09:16,624 INFO L226 Difference]: Without dead ends: 26 [2023-11-22 21:09:16,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 21:09:16,626 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 40 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 [2023-11-22 21:09:16,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 40 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-22 21:09:16,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-22 21:09:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-22 21:09:16,634 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 26 [2023-11-22 21:09:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:16,635 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-22 21:09:16,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 21:09:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-22 21:09:16,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-22 21:09:16,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:16,638 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:16,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:16,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-22 21:09:16,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:16,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash 220189929, now seen corresponding path program 1 times [2023-11-22 21:09:16,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:16,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007150510] [2023-11-22 21:09:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:16,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:16,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:09:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:16,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:09:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-22 21:09:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-22 21:09:17,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:17,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007150510] [2023-11-22 21:09:17,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007150510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:17,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852932561] [2023-11-22 21:09:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:17,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:17,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:17,035 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) [2023-11-22 21:09:17,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 21:09:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-22 21:09:17,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-22 21:09:17,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-22 21:09:17,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852932561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 21:09:17,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-22 21:09:17,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-22 21:09:17,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892758295] [2023-11-22 21:09:17,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 21:09:17,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 21:09:17,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 21:09:17,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:09:17,123 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 21:09:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:17,137 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-11-22 21:09:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 21:09:17,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-11-22 21:09:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:17,139 INFO L225 Difference]: With dead ends: 38 [2023-11-22 21:09:17,139 INFO L226 Difference]: Without dead ends: 24 [2023-11-22 21:09:17,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-22 21:09:17,140 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:17,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-22 21:09:17,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-22 21:09:17,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-11-22 21:09:17,147 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 35 [2023-11-22 21:09:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:17,148 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-11-22 21:09:17,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-22 21:09:17,149 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-11-22 21:09:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-22 21:09:17,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:17,151 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:17,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:17,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:17,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:17,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:17,370 INFO L85 PathProgramCache]: Analyzing trace with hash -727189650, now seen corresponding path program 1 times [2023-11-22 21:09:17,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:17,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456251432] [2023-11-22 21:09:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:17,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-22 21:09:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:09:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 21:09:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-22 21:09:17,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:17,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456251432] [2023-11-22 21:09:17,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456251432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:17,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866392514] [2023-11-22 21:09:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:17,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:17,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:17,464 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) [2023-11-22 21:09:17,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 21:09:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-22 21:09:17,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-22 21:09:17,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-22 21:09:17,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866392514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:17,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:17,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-11-22 21:09:17,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845029769] [2023-11-22 21:09:17,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:17,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-22 21:09:17,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-22 21:09:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-22 21:09:17,614 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:17,660 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2023-11-22 21:09:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-22 21:09:17,661 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2023-11-22 21:09:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:17,663 INFO L225 Difference]: With dead ends: 55 [2023-11-22 21:09:17,663 INFO L226 Difference]: Without dead ends: 34 [2023-11-22 21:09:17,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-22 21:09:17,666 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:17,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-22 21:09:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2023-11-22 21:09:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-11-22 21:09:17,674 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 36 [2023-11-22 21:09:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:17,674 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-11-22 21:09:17,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-11-22 21:09:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-22 21:09:17,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:17,675 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:17,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:17,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:17,890 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:17,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:17,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1910194571, now seen corresponding path program 2 times [2023-11-22 21:09:17,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:17,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862668649] [2023-11-22 21:09:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:17,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-22 21:09:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-22 21:09:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-11-22 21:09:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-22 21:09:17,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:17,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862668649] [2023-11-22 21:09:17,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862668649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:17,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090891221] [2023-11-22 21:09:17,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:09:17,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:17,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:18,000 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) [2023-11-22 21:09:18,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 21:09:18,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:09:18,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:18,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-22 21:09:18,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-22 21:09:18,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-11-22 21:09:18,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090891221] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:18,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:18,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-11-22 21:09:18,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414603636] [2023-11-22 21:09:18,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:18,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 21:09:18,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 21:09:18,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-22 21:09:18,245 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-22 21:09:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:18,283 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2023-11-22 21:09:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 21:09:18,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-11-22 21:09:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:18,284 INFO L225 Difference]: With dead ends: 63 [2023-11-22 21:09:18,284 INFO L226 Difference]: Without dead ends: 38 [2023-11-22 21:09:18,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-22 21:09:18,285 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:18,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:18,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-22 21:09:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-22 21:09:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2023-11-22 21:09:18,291 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 48 [2023-11-22 21:09:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:18,292 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2023-11-22 21:09:18,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-22 21:09:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2023-11-22 21:09:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-22 21:09:18,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:18,293 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:18,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:18,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:18,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:18,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:18,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1702488334, now seen corresponding path program 3 times [2023-11-22 21:09:18,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:18,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407924368] [2023-11-22 21:09:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:18,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:18,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:09:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:18,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-11-22 21:09:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:18,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-22 21:09:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-22 21:09:18,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:18,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407924368] [2023-11-22 21:09:18,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407924368] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:18,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510364958] [2023-11-22 21:09:18,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:09:18,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:18,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:18,652 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) [2023-11-22 21:09:18,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 21:09:18,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 21:09:18,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:18,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-22 21:09:18,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-22 21:09:18,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-22 21:09:18,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510364958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:18,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:18,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-22 21:09:18,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914250502] [2023-11-22 21:09:18,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:18,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-22 21:09:18,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:18,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-22 21:09:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:09:18,809 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:18,845 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2023-11-22 21:09:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 21:09:18,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2023-11-22 21:09:18,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:18,846 INFO L225 Difference]: With dead ends: 73 [2023-11-22 21:09:18,846 INFO L226 Difference]: Without dead ends: 49 [2023-11-22 21:09:18,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-22 21:09:18,847 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:18,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 117 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-22 21:09:18,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2023-11-22 21:09:18,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:18,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-11-22 21:09:18,852 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 55 [2023-11-22 21:09:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:18,853 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-11-22 21:09:18,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:18,853 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-11-22 21:09:18,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-22 21:09:18,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:18,857 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:18,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:19,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:19,071 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:19,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash 247386870, now seen corresponding path program 4 times [2023-11-22 21:09:19,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:19,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161927699] [2023-11-22 21:09:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:19,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:19,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-22 21:09:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:19,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-22 21:09:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:19,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-11-22 21:09:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-11-22 21:09:19,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161927699] [2023-11-22 21:09:19,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161927699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960977025] [2023-11-22 21:09:19,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:09:19,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:19,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:19,419 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) [2023-11-22 21:09:19,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 21:09:19,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:09:19,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:19,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-22 21:09:19,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-11-22 21:09:19,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-22 21:09:19,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960977025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:19,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:19,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2023-11-22 21:09:19,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550403452] [2023-11-22 21:09:19,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:19,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-22 21:09:19,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-22 21:09:19,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-11-22 21:09:19,669 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:19,720 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-11-22 21:09:19,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-22 21:09:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2023-11-22 21:09:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:19,722 INFO L225 Difference]: With dead ends: 101 [2023-11-22 21:09:19,722 INFO L226 Difference]: Without dead ends: 67 [2023-11-22 21:09:19,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2023-11-22 21:09:19,723 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:19,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 151 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:19,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-22 21:09:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-22 21:09:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 62 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2023-11-22 21:09:19,729 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 68 [2023-11-22 21:09:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:19,729 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2023-11-22 21:09:19,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2023-11-22 21:09:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-22 21:09:19,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:19,733 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 11, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:19,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:19,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:19,948 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:19,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:19,948 INFO L85 PathProgramCache]: Analyzing trace with hash 782687711, now seen corresponding path program 5 times [2023-11-22 21:09:19,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:19,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451013055] [2023-11-22 21:09:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:19,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:20,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-22 21:09:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:20,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-11-22 21:09:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:20,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-22 21:09:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2023-11-22 21:09:20,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:20,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451013055] [2023-11-22 21:09:20,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451013055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:20,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494202768] [2023-11-22 21:09:20,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:09:20,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:20,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:20,276 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:09:20,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 21:09:20,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-11-22 21:09:20,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:20,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-22 21:09:20,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 420 proven. 92 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-11-22 21:09:20,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 0 proven. 514 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-11-22 21:09:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494202768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:21,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:21,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2023-11-22 21:09:21,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504793115] [2023-11-22 21:09:21,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:21,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-22 21:09:21,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:21,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-22 21:09:21,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-11-22 21:09:21,120 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:21,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:21,231 INFO L93 Difference]: Finished difference Result 162 states and 235 transitions. [2023-11-22 21:09:21,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-22 21:09:21,232 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 114 [2023-11-22 21:09:21,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:21,234 INFO L225 Difference]: With dead ends: 162 [2023-11-22 21:09:21,234 INFO L226 Difference]: Without dead ends: 108 [2023-11-22 21:09:21,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2023-11-22 21:09:21,235 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:21,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 251 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:09:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-22 21:09:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-11-22 21:09:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 148 transitions. [2023-11-22 21:09:21,249 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 148 transitions. Word has length 114 [2023-11-22 21:09:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:21,249 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 148 transitions. [2023-11-22 21:09:21,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 148 transitions. [2023-11-22 21:09:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-22 21:09:21,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:21,252 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:21,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:21,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-22 21:09:21,468 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:21,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:21,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2082430674, now seen corresponding path program 6 times [2023-11-22 21:09:21,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:21,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944452134] [2023-11-22 21:09:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:21,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:21,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-22 21:09:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:21,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-22 21:09:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:21,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2023-11-22 21:09:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2023-11-22 21:09:21,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:21,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944452134] [2023-11-22 21:09:21,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944452134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:21,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609141481] [2023-11-22 21:09:21,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 21:09:21,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:21,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:21,966 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:09:21,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 21:09:22,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-22 21:09:22,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:22,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-22 21:09:22,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 2024 proven. 21 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2023-11-22 21:09:22,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4566 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4545 trivial. 0 not checked. [2023-11-22 21:09:22,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609141481] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:22,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:22,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-11-22 21:09:22,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758254797] [2023-11-22 21:09:22,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:22,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-22 21:09:22,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:22,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-22 21:09:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-11-22 21:09:22,433 INFO L87 Difference]: Start difference. First operand 108 states and 148 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:22,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:22,478 INFO L93 Difference]: Finished difference Result 211 states and 299 transitions. [2023-11-22 21:09:22,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-22 21:09:22,478 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 205 [2023-11-22 21:09:22,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:22,480 INFO L225 Difference]: With dead ends: 211 [2023-11-22 21:09:22,481 INFO L226 Difference]: Without dead ends: 117 [2023-11-22 21:09:22,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-11-22 21:09:22,483 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:22,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 139 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-22 21:09:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-11-22 21:09:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.3482142857142858) internal successors, (151), 112 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 157 transitions. [2023-11-22 21:09:22,499 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 157 transitions. Word has length 205 [2023-11-22 21:09:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:22,499 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 157 transitions. [2023-11-22 21:09:22,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 157 transitions. [2023-11-22 21:09:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-11-22 21:09:22,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:22,503 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 14, 13, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:22,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:22,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:22,718 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:22,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1810196225, now seen corresponding path program 7 times [2023-11-22 21:09:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:22,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14952179] [2023-11-22 21:09:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-22 21:09:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:23,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-22 21:09:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:23,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2023-11-22 21:09:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:23,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:23,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14952179] [2023-11-22 21:09:23,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14952179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:23,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112254576] [2023-11-22 21:09:23,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 21:09:23,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:23,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:23,224 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:09:23,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 21:09:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:23,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-22 21:09:23,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:23,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:23,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112254576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:23,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:23,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 31 [2023-11-22 21:09:23,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047218545] [2023-11-22 21:09:23,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:23,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-22 21:09:23,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:23,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-22 21:09:23,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-22 21:09:23,767 INFO L87 Difference]: Start difference. First operand 117 states and 157 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:23,825 INFO L93 Difference]: Finished difference Result 234 states and 328 transitions. [2023-11-22 21:09:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-22 21:09:23,826 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 214 [2023-11-22 21:09:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:23,826 INFO L225 Difference]: With dead ends: 234 [2023-11-22 21:09:23,826 INFO L226 Difference]: Without dead ends: 132 [2023-11-22 21:09:23,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-22 21:09:23,840 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:23,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 21:09:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-22 21:09:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-22 21:09:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.3070866141732282) internal successors, (166), 127 states have internal predecessors, (166), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 172 transitions. [2023-11-22 21:09:23,851 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 172 transitions. Word has length 214 [2023-11-22 21:09:23,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:23,851 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 172 transitions. [2023-11-22 21:09:23,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:23,852 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 172 transitions. [2023-11-22 21:09:23,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-11-22 21:09:23,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:23,854 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 54, 28, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:23,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:24,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-22 21:09:24,068 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:24,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:24,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1342335058, now seen corresponding path program 8 times [2023-11-22 21:09:24,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:24,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078786088] [2023-11-22 21:09:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:24,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:25,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-11-22 21:09:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:25,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-11-22 21:09:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:25,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-11-22 21:09:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:25,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:25,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078786088] [2023-11-22 21:09:25,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078786088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:25,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970915352] [2023-11-22 21:09:25,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 21:09:25,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:25,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:25,148 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:09:25,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 21:09:25,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 21:09:25,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:25,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-22 21:09:25,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:25,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:26,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970915352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:26,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:26,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2023-11-22 21:09:26,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236553628] [2023-11-22 21:09:26,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:26,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-22 21:09:26,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:26,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-22 21:09:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-22 21:09:26,597 INFO L87 Difference]: Start difference. First operand 132 states and 172 transitions. Second operand has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:26,675 INFO L93 Difference]: Finished difference Result 264 states and 373 transitions. [2023-11-22 21:09:26,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-22 21:09:26,676 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 229 [2023-11-22 21:09:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:26,677 INFO L225 Difference]: With dead ends: 264 [2023-11-22 21:09:26,677 INFO L226 Difference]: Without dead ends: 162 [2023-11-22 21:09:26,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2023-11-22 21:09:26,679 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:26,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:09:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-22 21:09:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2023-11-22 21:09:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2484076433121019) internal successors, (196), 157 states have internal predecessors, (196), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 202 transitions. [2023-11-22 21:09:26,687 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 202 transitions. Word has length 229 [2023-11-22 21:09:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:26,688 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 202 transitions. [2023-11-22 21:09:26,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-22 21:09:26,688 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 202 transitions. [2023-11-22 21:09:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-22 21:09:26,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:26,691 INFO L195 NwaCegarLoop]: trace histogram [58, 54, 54, 54, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:26,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:26,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-22 21:09:26,907 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:26,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:26,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1392892750, now seen corresponding path program 9 times [2023-11-22 21:09:26,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:26,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435355041] [2023-11-22 21:09:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:26,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:29,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-11-22 21:09:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:29,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2023-11-22 21:09:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:29,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2023-11-22 21:09:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 4572 trivial. 0 not checked. [2023-11-22 21:09:29,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:29,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435355041] [2023-11-22 21:09:29,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435355041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:29,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474308059] [2023-11-22 21:09:29,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 21:09:29,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:29,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:29,821 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:09:29,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 21:09:30,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-22 21:09:30,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:30,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-22 21:09:30,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 2024 proven. 105 refuted. 0 times theorem prover too weak. 4154 trivial. 0 not checked. [2023-11-22 21:09:31,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6283 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6178 trivial. 0 not checked. [2023-11-22 21:09:31,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474308059] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:31,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:31,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 17, 17] total 91 [2023-11-22 21:09:31,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568845598] [2023-11-22 21:09:31,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:31,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-22 21:09:31,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:31,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-22 21:09:31,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-11-22 21:09:31,794 INFO L87 Difference]: Start difference. First operand 162 states and 202 transitions. Second operand has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:31,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:31,912 INFO L93 Difference]: Finished difference Result 281 states and 377 transitions. [2023-11-22 21:09:31,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-22 21:09:31,912 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 259 [2023-11-22 21:09:31,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:31,915 INFO L225 Difference]: With dead ends: 281 [2023-11-22 21:09:31,915 INFO L226 Difference]: Without dead ends: 179 [2023-11-22 21:09:31,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2325, Invalid=5865, Unknown=0, NotChecked=0, Total=8190 [2023-11-22 21:09:31,918 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:31,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:09:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-22 21:09:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2023-11-22 21:09:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.2241379310344827) internal successors, (213), 174 states have internal predecessors, (213), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:31,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2023-11-22 21:09:31,929 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 259 [2023-11-22 21:09:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:31,929 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2023-11-22 21:09:31,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2967032967032968) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:31,930 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2023-11-22 21:09:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-11-22 21:09:31,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:31,932 INFO L195 NwaCegarLoop]: trace histogram [59, 54, 54, 54, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:31,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:32,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-22 21:09:32,148 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:32,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash 384793247, now seen corresponding path program 10 times [2023-11-22 21:09:32,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:32,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306131045] [2023-11-22 21:09:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:32,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:35,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2023-11-22 21:09:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:35,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2023-11-22 21:09:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:35,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2023-11-22 21:09:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 4932 trivial. 0 not checked. [2023-11-22 21:09:35,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:35,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306131045] [2023-11-22 21:09:35,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306131045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:35,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58691230] [2023-11-22 21:09:35,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 21:09:35,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:35,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:35,080 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:09:35,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 21:09:35,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 21:09:35,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 21:09:35,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-22 21:09:35,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 21:09:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-11-22 21:09:36,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 21:09:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6702 backedges. 2022 proven. 477 refuted. 0 times theorem prover too weak. 4203 trivial. 0 not checked. [2023-11-22 21:09:36,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58691230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 21:09:36,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 21:09:36,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 21, 21] total 100 [2023-11-22 21:09:36,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339378984] [2023-11-22 21:09:36,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 21:09:36,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-22 21:09:36,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 21:09:36,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-22 21:09:36,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-11-22 21:09:36,965 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:37,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 21:09:37,172 INFO L93 Difference]: Finished difference Result 378 states and 521 transitions. [2023-11-22 21:09:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-22 21:09:37,173 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 276 [2023-11-22 21:09:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 21:09:37,174 INFO L225 Difference]: With dead ends: 378 [2023-11-22 21:09:37,174 INFO L226 Difference]: Without dead ends: 260 [2023-11-22 21:09:37,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2242 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2670, Invalid=7230, Unknown=0, NotChecked=0, Total=9900 [2023-11-22 21:09:37,178 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 442 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 21:09:37,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 256 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 21:09:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-22 21:09:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-11-22 21:09:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.3098039215686275) internal successors, (334), 255 states have internal predecessors, (334), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-22 21:09:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 340 transitions. [2023-11-22 21:09:37,187 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 340 transitions. Word has length 276 [2023-11-22 21:09:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 21:09:37,187 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 340 transitions. [2023-11-22 21:09:37,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.98) internal successors, (198), 100 states have internal predecessors, (198), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-22 21:09:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 340 transitions. [2023-11-22 21:09:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-22 21:09:37,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 21:09:37,194 INFO L195 NwaCegarLoop]: trace histogram [114, 114, 114, 60, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 21:09:37,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 21:09:37,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-22 21:09:37,411 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 21:09:37,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 21:09:37,411 INFO L85 PathProgramCache]: Analyzing trace with hash 43549266, now seen corresponding path program 11 times [2023-11-22 21:09:37,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 21:09:37,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881732431] [2023-11-22 21:09:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 21:09:37,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 21:09:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:40,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-11-22 21:09:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:40,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2023-11-22 21:09:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:40,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 335 [2023-11-22 21:09:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 21:09:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21972 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 20142 trivial. 0 not checked. [2023-11-22 21:09:40,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 21:09:40,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881732431] [2023-11-22 21:09:40,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881732431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 21:09:40,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943596033] [2023-11-22 21:09:40,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 21:09:40,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 21:09:40,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 21:09:40,748 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 21:09:40,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process Killed by 15