./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.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 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 19:42:46,697 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 19:42:46,763 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 19:42:46,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 19:42:46,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 19:42:46,803 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 19:42:46,806 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 19:42:46,806 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 19:42:46,807 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 19:42:46,808 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 19:42:46,809 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 19:42:46,809 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 19:42:46,810 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 19:42:46,810 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 19:42:46,812 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 19:42:46,813 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 19:42:46,813 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 19:42:46,813 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 19:42:46,814 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 19:42:46,814 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 19:42:46,814 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 19:42:46,818 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 19:42:46,819 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 19:42:46,819 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 19:42:46,819 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 19:42:46,819 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 19:42:46,820 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 19:42:46,820 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 19:42:46,820 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 19:42:46,820 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 19:42:46,821 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 19:42:46,821 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 19:42:46,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:42:46,821 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 19:42:46,822 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 19:42:46,822 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 19:42:46,822 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 19:42:46,825 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 19:42:46,826 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 19:42:46,826 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 19:42:46,826 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 19:42:46,827 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 19:42:46,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6531e15623308e4078ac0600b5852029139b0fe65df20988c6e3b5d5367f33f6 [2024-10-23 19:42:47,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 19:42:47,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 19:42:47,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 19:42:47,124 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 19:42:47,125 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 19:42:47,126 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i [2024-10-23 19:42:48,576 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 19:42:48,759 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 19:42:48,760 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i [2024-10-23 19:42:48,765 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ce59c95/99d19748180546a5b20b8749ec5af97f/FLAG9a157bf9d [2024-10-23 19:42:49,155 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ce59c95/99d19748180546a5b20b8749ec5af97f [2024-10-23 19:42:49,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 19:42:49,159 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 19:42:49,160 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 19:42:49,160 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 19:42:49,165 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 19:42:49,166 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab43570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49, skipping insertion in model container [2024-10-23 19:42:49,169 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,192 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 19:42:49,384 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2024-10-23 19:42:49,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:42:49,412 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 19:42:49,436 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum60.i[1465,1478] [2024-10-23 19:42:49,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 19:42:49,461 INFO L204 MainTranslator]: Completed translation [2024-10-23 19:42:49,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49 WrapperNode [2024-10-23 19:42:49,462 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 19:42:49,463 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 19:42:49,463 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 19:42:49,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 19:42:49,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,475 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,490 INFO L138 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2024-10-23 19:42:49,491 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 19:42:49,491 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 19:42:49,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 19:42:49,491 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 19:42:49,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,504 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,523 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-10-23 19:42:49,523 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,523 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,529 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,536 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 19:42:49,537 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 19:42:49,537 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 19:42:49,537 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 19:42:49,538 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (1/1) ... [2024-10-23 19:42:49,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 19:42:49,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:49,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-23 19:42:49,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-23 19:42:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 19:42:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 19:42:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-23 19:42:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-23 19:42:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-23 19:42:49,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-23 19:42:49,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 19:42:49,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 19:42:49,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-23 19:42:49,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-23 19:42:49,629 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2024-10-23 19:42:49,629 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2024-10-23 19:42:49,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-23 19:42:49,727 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 19:42:49,730 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 19:42:49,923 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-10-23 19:42:49,923 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 19:42:49,966 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 19:42:49,969 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-23 19:42:49,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:42:49 BoogieIcfgContainer [2024-10-23 19:42:49,970 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 19:42:49,972 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 19:42:49,972 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 19:42:49,975 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 19:42:49,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:42:49" (1/3) ... [2024-10-23 19:42:49,977 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208dbb48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:42:49, skipping insertion in model container [2024-10-23 19:42:49,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:42:49" (2/3) ... [2024-10-23 19:42:49,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@208dbb48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:42:49, skipping insertion in model container [2024-10-23 19:42:49,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:42:49" (3/3) ... [2024-10-23 19:42:49,979 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2024-10-23 19:42:49,992 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 19:42:49,992 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 19:42:50,043 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 19:42:50,049 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@753d8ed4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 19:42:50,049 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 19:42:50,052 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) [2024-10-23 19:42:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-23 19:42:50,058 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:50,059 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:50,059 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:50,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:50,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1502132506, now seen corresponding path program 1 times [2024-10-23 19:42:50,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:50,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561357879] [2024-10-23 19:42:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:50,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,343 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-23 19:42:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,362 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-23 19:42:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,374 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-23 19:42:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-23 19:42:50,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:50,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561357879] [2024-10-23 19:42:50,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561357879] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:42:50,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 19:42:50,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 19:42:50,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069360189] [2024-10-23 19:42:50,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:42:50,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:42:50,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:50,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:42:50,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:42:50,418 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 19:42:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:50,451 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2024-10-23 19:42:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:42:50,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (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 28 [2024-10-23 19:42:50,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:50,464 INFO L225 Difference]: With dead ends: 45 [2024-10-23 19:42:50,464 INFO L226 Difference]: Without dead ends: 22 [2024-10-23 19:42:50,467 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 19:42:50,470 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:50,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:50,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-23 19:42:50,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-23 19:42:50,499 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) [2024-10-23 19:42:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-10-23 19:42:50,501 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2024-10-23 19:42:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:50,502 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-10-23 19:42:50,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 19:42:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-10-23 19:42:50,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-23 19:42:50,503 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:50,503 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:50,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 19:42:50,504 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:50,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:50,505 INFO L85 PathProgramCache]: Analyzing trace with hash -432814053, now seen corresponding path program 1 times [2024-10-23 19:42:50,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:50,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618166170] [2024-10-23 19:42:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:50,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,712 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-23 19:42:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-23 19:42:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,782 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 19:42:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-23 19:42:50,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618166170] [2024-10-23 19:42:50,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618166170] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218075166] [2024-10-23 19:42:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:50,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:50,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:50,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:42:50,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 19:42:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:50,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-23 19:42:50,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 19:42:50,986 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 19:42:50,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218075166] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:42:50,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 19:42:50,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-23 19:42:50,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271102440] [2024-10-23 19:42:50,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:42:50,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:42:50,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:50,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:42:50,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:50,990 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2024-10-23 19:42:51,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:51,018 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2024-10-23 19:42:51,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:42:51,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 29 [2024-10-23 19:42:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:51,020 INFO L225 Difference]: With dead ends: 42 [2024-10-23 19:42:51,020 INFO L226 Difference]: Without dead ends: 25 [2024-10-23 19:42:51,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:51,022 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:51,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-23 19:42:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-10-23 19:42:51,027 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) [2024-10-23 19:42:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-10-23 19:42:51,028 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 29 [2024-10-23 19:42:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:51,029 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-10-23 19:42:51,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2024-10-23 19:42:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-10-23 19:42:51,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-23 19:42:51,030 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:51,030 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:51,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-23 19:42:51,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:51,232 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:51,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash 28977858, now seen corresponding path program 1 times [2024-10-23 19:42:51,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:51,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240402282] [2024-10-23 19:42:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:51,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,355 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-23 19:42:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,368 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-23 19:42:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,380 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-23 19:42:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-23 19:42:51,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:51,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240402282] [2024-10-23 19:42:51,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240402282] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:51,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687772609] [2024-10-23 19:42:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:51,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:51,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:51,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:42:51,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 19:42:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-23 19:42:51,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-23 19:42:51,518 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 19:42:51,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687772609] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:42:51,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 19:42:51,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-23 19:42:51,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861788209] [2024-10-23 19:42:51,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:42:51,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:42:51,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:51,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:42:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:51,522 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-23 19:42:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:51,540 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2024-10-23 19:42:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:42:51,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 38 [2024-10-23 19:42:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:51,543 INFO L225 Difference]: With dead ends: 40 [2024-10-23 19:42:51,543 INFO L226 Difference]: Without dead ends: 25 [2024-10-23 19:42:51,544 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:51,546 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:51,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-23 19:42:51,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-23 19:42:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2024-10-23 19:42:51,555 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 38 [2024-10-23 19:42:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:51,557 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2024-10-23 19:42:51,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-23 19:42:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2024-10-23 19:42:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-23 19:42:51,559 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:51,559 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:51,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-23 19:42:51,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-23 19:42:51,764 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:51,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2098863663, now seen corresponding path program 1 times [2024-10-23 19:42:51,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:51,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228231749] [2024-10-23 19:42:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:51,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,824 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-23 19:42:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,834 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-23 19:42:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-23 19:42:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:51,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:51,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228231749] [2024-10-23 19:42:51,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228231749] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:51,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891867503] [2024-10-23 19:42:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:51,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:51,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:51,854 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:42:51,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 19:42:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:51,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-23 19:42:51,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-23 19:42:51,969 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 19:42:51,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891867503] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:42:51,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 19:42:51,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-23 19:42:51,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731234576] [2024-10-23 19:42:51,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:42:51,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 19:42:51,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:51,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 19:42:51,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:51,977 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-23 19:42:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:52,000 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2024-10-23 19:42:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 19:42:52,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 39 [2024-10-23 19:42:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:52,002 INFO L225 Difference]: With dead ends: 49 [2024-10-23 19:42:52,002 INFO L226 Difference]: Without dead ends: 29 [2024-10-23 19:42:52,003 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-23 19:42:52,004 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:52,005 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-10-23 19:42:52,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-10-23 19:42:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2024-10-23 19:42:52,016 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 39 [2024-10-23 19:42:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:52,016 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2024-10-23 19:42:52,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2024-10-23 19:42:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2024-10-23 19:42:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-23 19:42:52,018 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:52,018 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:52,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-23 19:42:52,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:52,219 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:52,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1976122640, now seen corresponding path program 1 times [2024-10-23 19:42:52,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:52,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644807202] [2024-10-23 19:42:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:52,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,274 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-23 19:42:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-23 19:42:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,288 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-23 19:42:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:52,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:52,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644807202] [2024-10-23 19:42:52,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644807202] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:52,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819913446] [2024-10-23 19:42:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:52,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:52,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:52,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:42:52,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 19:42:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-23 19:42:52,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:52,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:52,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819913446] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:52,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:52,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-10-23 19:42:52,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149501338] [2024-10-23 19:42:52,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:52,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-23 19:42:52,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:52,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-23 19:42:52,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:42:52,457 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2024-10-23 19:42:52,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:52,480 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-10-23 19:42:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 19:42:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 39 [2024-10-23 19:42:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:52,484 INFO L225 Difference]: With dead ends: 58 [2024-10-23 19:42:52,485 INFO L226 Difference]: Without dead ends: 32 [2024-10-23 19:42:52,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-23 19:42:52,486 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:52,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-23 19:42:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-23 19:42:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-10-23 19:42:52,494 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 39 [2024-10-23 19:42:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:52,495 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-10-23 19:42:52,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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) [2024-10-23 19:42:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-10-23 19:42:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-23 19:42:52,496 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:52,496 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:52,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-23 19:42:52,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:52,697 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:52,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:52,698 INFO L85 PathProgramCache]: Analyzing trace with hash -71399842, now seen corresponding path program 2 times [2024-10-23 19:42:52,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:52,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967753041] [2024-10-23 19:42:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:52,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-23 19:42:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-23 19:42:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,778 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-23 19:42:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-23 19:42:52,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967753041] [2024-10-23 19:42:52,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967753041] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496363400] [2024-10-23 19:42:52,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:42:52,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:52,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:52,786 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:42:52,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 19:42:52,872 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:42:52,872 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:52,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-23 19:42:52,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:52,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-23 19:42:53,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496363400] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:53,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:53,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-23 19:42:53,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455994842] [2024-10-23 19:42:53,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:53,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-23 19:42:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:53,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-23 19:42:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-23 19:42:53,031 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-23 19:42:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:53,084 INFO L93 Difference]: Finished difference Result 68 states and 94 transitions. [2024-10-23 19:42:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-23 19:42:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-10-23 19:42:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:53,088 INFO L225 Difference]: With dead ends: 68 [2024-10-23 19:42:53,088 INFO L226 Difference]: Without dead ends: 42 [2024-10-23 19:42:53,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-23 19:42:53,090 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:53,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-23 19:42:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-10-23 19:42:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-10-23 19:42:53,099 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 42 [2024-10-23 19:42:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:53,099 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-10-23 19:42:53,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-23 19:42:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-10-23 19:42:53,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-10-23 19:42:53,100 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:53,101 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:53,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-23 19:42:53,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:53,301 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:53,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:53,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1756456273, now seen corresponding path program 3 times [2024-10-23 19:42:53,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:53,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924892830] [2024-10-23 19:42:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:53,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,351 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-23 19:42:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,368 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-10-23 19:42:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,372 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-10-23 19:42:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-10-23 19:42:53,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:53,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924892830] [2024-10-23 19:42:53,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924892830] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:53,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730247035] [2024-10-23 19:42:53,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:42:53,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:53,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:53,378 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:42:53,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-23 19:42:53,454 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-23 19:42:53,454 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:53,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-23 19:42:53,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-10-23 19:42:53,464 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 19:42:53,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730247035] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 19:42:53,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 19:42:53,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2024-10-23 19:42:53,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389123596] [2024-10-23 19:42:53,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 19:42:53,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-23 19:42:53,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:53,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-23 19:42:53,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:42:53,466 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 19:42:53,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:53,491 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2024-10-23 19:42:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-23 19:42:53,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-10-23 19:42:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:53,492 INFO L225 Difference]: With dead ends: 71 [2024-10-23 19:42:53,492 INFO L226 Difference]: Without dead ends: 44 [2024-10-23 19:42:53,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-23 19:42:53,493 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:53,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 56 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-23 19:42:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2024-10-23 19:42:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-10-23 19:42:53,498 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 57 [2024-10-23 19:42:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:53,498 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-10-23 19:42:53,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 19:42:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-10-23 19:42:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-23 19:42:53,500 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:53,500 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:53,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-23 19:42:53,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:53,701 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:53,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:53,701 INFO L85 PathProgramCache]: Analyzing trace with hash 882234655, now seen corresponding path program 1 times [2024-10-23 19:42:53,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:53,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975148151] [2024-10-23 19:42:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:53,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,780 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-23 19:42:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,788 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-23 19:42:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,795 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-23 19:42:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2024-10-23 19:42:53,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:53,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975148151] [2024-10-23 19:42:53,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975148151] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:53,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190376756] [2024-10-23 19:42:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:53,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:53,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:53,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:42:53,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-23 19:42:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:53,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-23 19:42:53,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-10-23 19:42:54,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2024-10-23 19:42:54,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190376756] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:54,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:54,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 12, 13] total 26 [2024-10-23 19:42:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522500101] [2024-10-23 19:42:54,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:54,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-23 19:42:54,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-23 19:42:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-10-23 19:42:54,318 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 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) [2024-10-23 19:42:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:54,375 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2024-10-23 19:42:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-23 19:42:54,376 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 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 66 [2024-10-23 19:42:54,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:54,376 INFO L225 Difference]: With dead ends: 79 [2024-10-23 19:42:54,377 INFO L226 Difference]: Without dead ends: 52 [2024-10-23 19:42:54,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-10-23 19:42:54,379 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:54,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 19:42:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-23 19:42:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-10-23 19:42:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2024-10-23 19:42:54,385 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 66 [2024-10-23 19:42:54,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:54,386 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2024-10-23 19:42:54,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 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) [2024-10-23 19:42:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2024-10-23 19:42:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-23 19:42:54,387 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:54,387 INFO L215 NwaCegarLoop]: trace histogram [22, 9, 9, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:54,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-23 19:42:54,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:54,592 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:54,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:54,592 INFO L85 PathProgramCache]: Analyzing trace with hash -450693842, now seen corresponding path program 2 times [2024-10-23 19:42:54,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:54,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218866065] [2024-10-23 19:42:54,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:54,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:55,325 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-23 19:42:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:55,337 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-23 19:42:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:55,344 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-10-23 19:42:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-23 19:42:55,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:55,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218866065] [2024-10-23 19:42:55,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218866065] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:55,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28122753] [2024-10-23 19:42:55,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:42:55,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:55,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:55,355 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) [2024-10-23 19:42:55,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-23 19:42:55,490 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:42:55,490 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:55,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-23 19:42:55,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-23 19:42:55,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-23 19:42:56,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28122753] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:56,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:56,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 49 [2024-10-23 19:42:56,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851276480] [2024-10-23 19:42:56,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:56,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-23 19:42:56,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:56,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-23 19:42:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-23 19:42:56,452 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 49 states have internal predecessors, (75), 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) [2024-10-23 19:42:56,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:56,539 INFO L93 Difference]: Finished difference Result 104 states and 139 transitions. [2024-10-23 19:42:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-23 19:42:56,539 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 49 states have internal predecessors, (75), 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 79 [2024-10-23 19:42:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:56,542 INFO L225 Difference]: With dead ends: 104 [2024-10-23 19:42:56,542 INFO L226 Difference]: Without dead ends: 76 [2024-10-23 19:42:56,543 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-23 19:42:56,544 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:56,544 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 178 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:42:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-10-23 19:42:56,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-10-23 19:42:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:42:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2024-10-23 19:42:56,562 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 79 [2024-10-23 19:42:56,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:56,564 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2024-10-23 19:42:56,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 49 states have internal predecessors, (75), 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) [2024-10-23 19:42:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2024-10-23 19:42:56,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-10-23 19:42:56,566 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:56,566 INFO L215 NwaCegarLoop]: trace histogram [46, 9, 9, 6, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:56,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-23 19:42:56,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-23 19:42:56,767 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:56,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:56,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1917299246, now seen corresponding path program 3 times [2024-10-23 19:42:56,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:56,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936017698] [2024-10-23 19:42:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:56,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:58,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-23 19:42:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:58,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-10-23 19:42:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:58,758 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-10-23 19:42:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:42:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1234 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-10-23 19:42:58,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:42:58,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936017698] [2024-10-23 19:42:58,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936017698] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:42:58,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886152552] [2024-10-23 19:42:58,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:42:58,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:42:58,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:42:58,767 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) [2024-10-23 19:42:58,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-23 19:42:58,895 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-23 19:42:58,896 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:42:58,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:42:58,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:42:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1234 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2024-10-23 19:42:58,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:42:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1234 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2024-10-23 19:42:59,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886152552] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:42:59,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:42:59,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5, 5] total 55 [2024-10-23 19:42:59,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287679967] [2024-10-23 19:42:59,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:42:59,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-23 19:42:59,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:42:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-23 19:42:59,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=1767, Unknown=0, NotChecked=0, Total=2970 [2024-10-23 19:42:59,081 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 55 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 55 states have internal predecessors, (86), 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) [2024-10-23 19:42:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:42:59,152 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2024-10-23 19:42:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-10-23 19:42:59,152 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 55 states have internal predecessors, (86), 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 103 [2024-10-23 19:42:59,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:42:59,153 INFO L225 Difference]: With dead ends: 109 [2024-10-23 19:42:59,153 INFO L226 Difference]: Without dead ends: 81 [2024-10-23 19:42:59,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1203, Invalid=1767, Unknown=0, NotChecked=0, Total=2970 [2024-10-23 19:42:59,155 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:42:59,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:42:59,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-23 19:42:59,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-10-23 19:42:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 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) [2024-10-23 19:42:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2024-10-23 19:42:59,162 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 103 [2024-10-23 19:42:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:42:59,163 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2024-10-23 19:42:59,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 55 states have internal predecessors, (86), 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) [2024-10-23 19:42:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2024-10-23 19:42:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-10-23 19:42:59,164 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:42:59,164 INFO L215 NwaCegarLoop]: trace histogram [47, 9, 9, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:42:59,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-23 19:42:59,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-23 19:42:59,365 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:42:59,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:42:59,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1351664252, now seen corresponding path program 4 times [2024-10-23 19:42:59,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:42:59,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561572375] [2024-10-23 19:42:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:42:59,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:42:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:01,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-23 19:43:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:01,238 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-10-23 19:43:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:01,246 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-10-23 19:43:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-10-23 19:43:01,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:43:01,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561572375] [2024-10-23 19:43:01,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561572375] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:43:01,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184424570] [2024-10-23 19:43:01,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:43:01,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:01,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:01,255 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) [2024-10-23 19:43:01,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-23 19:43:01,459 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:43:01,459 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:43:01,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-23 19:43:01,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:43:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1213 trivial. 0 not checked. [2024-10-23 19:43:01,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:43:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1299 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 1213 trivial. 0 not checked. [2024-10-23 19:43:01,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184424570] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:43:01,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:43:01,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 5, 5] total 56 [2024-10-23 19:43:01,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350358262] [2024-10-23 19:43:01,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:43:01,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-10-23 19:43:01,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:43:01,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-10-23 19:43:01,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1252, Invalid=1828, Unknown=0, NotChecked=0, Total=3080 [2024-10-23 19:43:01,667 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 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) [2024-10-23 19:43:01,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:43:01,777 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2024-10-23 19:43:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-10-23 19:43:01,777 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 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 108 [2024-10-23 19:43:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:43:01,778 INFO L225 Difference]: With dead ends: 126 [2024-10-23 19:43:01,778 INFO L226 Difference]: Without dead ends: 94 [2024-10-23 19:43:01,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1252, Invalid=1828, Unknown=0, NotChecked=0, Total=3080 [2024-10-23 19:43:01,780 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:43:01,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 152 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:43:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-10-23 19:43:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-10-23 19:43:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:43:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2024-10-23 19:43:01,794 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 108 [2024-10-23 19:43:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:43:01,795 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2024-10-23 19:43:01,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 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) [2024-10-23 19:43:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2024-10-23 19:43:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-10-23 19:43:01,796 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:43:01,797 INFO L215 NwaCegarLoop]: trace histogram [48, 21, 21, 18, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:43:01,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-23 19:43:01,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-23 19:43:01,998 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:43:01,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:43:01,998 INFO L85 PathProgramCache]: Analyzing trace with hash -455079314, now seen corresponding path program 5 times [2024-10-23 19:43:01,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:43:01,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329134539] [2024-10-23 19:43:01,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:43:01,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:43:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:03,801 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-23 19:43:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:03,809 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-10-23 19:43:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:03,814 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-10-23 19:43:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2024-10-23 19:43:03,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:43:03,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329134539] [2024-10-23 19:43:03,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329134539] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:43:03,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545808391] [2024-10-23 19:43:03,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 19:43:03,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:03,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:03,823 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) [2024-10-23 19:43:03,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-23 19:43:04,807 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-10-23 19:43:04,807 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:43:04,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-23 19:43:04,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:43:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 363 proven. 7 refuted. 0 times theorem prover too weak. 1535 trivial. 0 not checked. [2024-10-23 19:43:04,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:43:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 37 proven. 131 refuted. 0 times theorem prover too weak. 1737 trivial. 0 not checked. [2024-10-23 19:43:05,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545808391] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:43:05,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:43:05,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 6, 6] total 59 [2024-10-23 19:43:05,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773850189] [2024-10-23 19:43:05,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:43:05,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-10-23 19:43:05,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:43:05,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-10-23 19:43:05,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=2103, Unknown=0, NotChecked=0, Total=3422 [2024-10-23 19:43:05,056 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 59 states have internal predecessors, (97), 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) [2024-10-23 19:43:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:43:05,186 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2024-10-23 19:43:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-10-23 19:43:05,187 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 59 states have internal predecessors, (97), 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 145 [2024-10-23 19:43:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:43:05,189 INFO L225 Difference]: With dead ends: 157 [2024-10-23 19:43:05,189 INFO L226 Difference]: Without dead ends: 113 [2024-10-23 19:43:05,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1319, Invalid=2103, Unknown=0, NotChecked=0, Total=3422 [2024-10-23 19:43:05,191 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:43:05,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 254 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:43:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-10-23 19:43:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-10-23 19:43:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.1018518518518519) internal successors, (119), 108 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:43:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2024-10-23 19:43:05,202 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 145 [2024-10-23 19:43:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:43:05,203 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2024-10-23 19:43:05,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 59 states have internal predecessors, (97), 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) [2024-10-23 19:43:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2024-10-23 19:43:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-10-23 19:43:05,205 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:43:05,205 INFO L215 NwaCegarLoop]: trace histogram [49, 39, 39, 21, 18, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:43:05,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-23 19:43:05,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-23 19:43:05,406 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:43:05,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:43:05,407 INFO L85 PathProgramCache]: Analyzing trace with hash 990292892, now seen corresponding path program 6 times [2024-10-23 19:43:05,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:43:05,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355488935] [2024-10-23 19:43:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:43:05,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:43:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:07,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-10-23 19:43:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:07,223 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-10-23 19:43:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:07,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2024-10-23 19:43:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 2376 trivial. 0 not checked. [2024-10-23 19:43:07,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:43:07,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355488935] [2024-10-23 19:43:07,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355488935] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:43:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199826697] [2024-10-23 19:43:07,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 19:43:07,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:07,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:07,247 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) [2024-10-23 19:43:07,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-23 19:43:07,811 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-10-23 19:43:07,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:43:07,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-23 19:43:07,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:43:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 1076 proven. 21 refuted. 0 times theorem prover too weak. 2504 trivial. 0 not checked. [2024-10-23 19:43:07,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:43:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3580 trivial. 0 not checked. [2024-10-23 19:43:08,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199826697] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:43:08,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:43:08,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 9] total 66 [2024-10-23 19:43:08,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045252444] [2024-10-23 19:43:08,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:43:08,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-23 19:43:08,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:43:08,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-23 19:43:08,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=2845, Unknown=0, NotChecked=0, Total=4290 [2024-10-23 19:43:08,185 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 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) [2024-10-23 19:43:08,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:43:08,266 INFO L93 Difference]: Finished difference Result 184 states and 216 transitions. [2024-10-23 19:43:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-10-23 19:43:08,267 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 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 200 [2024-10-23 19:43:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:43:08,268 INFO L225 Difference]: With dead ends: 184 [2024-10-23 19:43:08,268 INFO L226 Difference]: Without dead ends: 122 [2024-10-23 19:43:08,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1445, Invalid=2845, Unknown=0, NotChecked=0, Total=4290 [2024-10-23 19:43:08,270 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:43:08,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:43:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-10-23 19:43:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-10-23 19:43:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0940170940170941) internal successors, (128), 117 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:43:08,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 134 transitions. [2024-10-23 19:43:08,278 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 134 transitions. Word has length 200 [2024-10-23 19:43:08,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:43:08,278 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 134 transitions. [2024-10-23 19:43:08,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 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) [2024-10-23 19:43:08,278 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 134 transitions. [2024-10-23 19:43:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2024-10-23 19:43:08,280 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:43:08,280 INFO L215 NwaCegarLoop]: trace histogram [50, 39, 39, 21, 18, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:43:08,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-23 19:43:08,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-23 19:43:08,481 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:43:08,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:43:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1255585074, now seen corresponding path program 7 times [2024-10-23 19:43:08,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:43:08,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037527582] [2024-10-23 19:43:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:43:08,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:43:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:10,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-23 19:43:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:10,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-10-23 19:43:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:10,526 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2024-10-23 19:43:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3735 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2024-10-23 19:43:10,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:43:10,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037527582] [2024-10-23 19:43:10,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037527582] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:43:10,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502550634] [2024-10-23 19:43:10,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 19:43:10,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:10,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:10,540 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) [2024-10-23 19:43:10,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-23 19:43:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:10,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-23 19:43:10,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:43:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3735 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2024-10-23 19:43:10,919 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:43:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3735 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2024-10-23 19:43:12,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502550634] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:43:12,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:43:12,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 53] total 63 [2024-10-23 19:43:12,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035094529] [2024-10-23 19:43:12,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:43:12,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-10-23 19:43:12,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:43:12,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-10-23 19:43:12,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2024-10-23 19:43:12,301 INFO L87 Difference]: Start difference. First operand 122 states and 134 transitions. Second operand has 63 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 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) [2024-10-23 19:43:12,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:43:12,375 INFO L93 Difference]: Finished difference Result 202 states and 235 transitions. [2024-10-23 19:43:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-10-23 19:43:12,376 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 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 209 [2024-10-23 19:43:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:43:12,377 INFO L225 Difference]: With dead ends: 202 [2024-10-23 19:43:12,377 INFO L226 Difference]: Without dead ends: 132 [2024-10-23 19:43:12,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 371 SyntacticMatches, 42 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2024-10-23 19:43:12,379 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:43:12,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:43:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-10-23 19:43:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2024-10-23 19:43:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 127 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:43:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 144 transitions. [2024-10-23 19:43:12,392 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 144 transitions. Word has length 209 [2024-10-23 19:43:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:43:12,392 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 144 transitions. [2024-10-23 19:43:12,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 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) [2024-10-23 19:43:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 144 transitions. [2024-10-23 19:43:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2024-10-23 19:43:12,395 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:43:12,395 INFO L215 NwaCegarLoop]: trace histogram [60, 39, 39, 21, 18, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:43:12,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-23 19:43:12,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-23 19:43:12,600 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:43:12,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:43:12,600 INFO L85 PathProgramCache]: Analyzing trace with hash 177726350, now seen corresponding path program 8 times [2024-10-23 19:43:12,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:43:12,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836593816] [2024-10-23 19:43:12,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:43:12,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:43:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:12,871 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-23 19:43:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:12,935 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-10-23 19:43:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:12,944 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2024-10-23 19:43:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 133 proven. 1131 refuted. 0 times theorem prover too weak. 3026 trivial. 0 not checked. [2024-10-23 19:43:12,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:43:12,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836593816] [2024-10-23 19:43:12,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836593816] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:43:12,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980051683] [2024-10-23 19:43:12,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 19:43:12,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:12,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:12,958 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) [2024-10-23 19:43:12,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-23 19:43:13,247 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 19:43:13,247 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:43:13,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-23 19:43:13,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:43:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 669 proven. 57 refuted. 0 times theorem prover too weak. 3564 trivial. 0 not checked. [2024-10-23 19:43:13,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:43:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 133 proven. 1131 refuted. 0 times theorem prover too weak. 3026 trivial. 0 not checked. [2024-10-23 19:43:13,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980051683] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:43:13,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:43:13,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-10-23 19:43:13,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835015639] [2024-10-23 19:43:13,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:43:13,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-23 19:43:13,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:43:13,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-23 19:43:13,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-10-23 19:43:13,383 INFO L87 Difference]: Start difference. First operand 132 states and 144 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 19:43:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:43:13,451 INFO L93 Difference]: Finished difference Result 224 states and 257 transitions. [2024-10-23 19:43:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-23 19:43:13,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 219 [2024-10-23 19:43:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:43:13,453 INFO L225 Difference]: With dead ends: 224 [2024-10-23 19:43:13,453 INFO L226 Difference]: Without dead ends: 156 [2024-10-23 19:43:13,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-10-23 19:43:13,454 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:43:13,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:43:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-10-23 19:43:13,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2024-10-23 19:43:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0728476821192052) internal successors, (162), 151 states have internal predecessors, (162), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:43:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 168 transitions. [2024-10-23 19:43:13,467 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 168 transitions. Word has length 219 [2024-10-23 19:43:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:43:13,467 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 168 transitions. [2024-10-23 19:43:13,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 19:43:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 168 transitions. [2024-10-23 19:43:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2024-10-23 19:43:13,469 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:43:13,470 INFO L215 NwaCegarLoop]: trace histogram [63, 63, 60, 42, 21, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:43:13,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-23 19:43:13,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:13,670 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:43:13,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:43:13,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1836779534, now seen corresponding path program 9 times [2024-10-23 19:43:13,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:43:13,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871111088] [2024-10-23 19:43:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:43:13,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:43:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:14,094 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-23 19:43:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:14,291 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-10-23 19:43:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:14,303 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2024-10-23 19:43:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7998 backedges. 293 proven. 3039 refuted. 0 times theorem prover too weak. 4666 trivial. 0 not checked. [2024-10-23 19:43:14,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:43:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871111088] [2024-10-23 19:43:14,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871111088] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:43:14,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345345265] [2024-10-23 19:43:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 19:43:14,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:14,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:14,323 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:43:14,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-23 19:43:15,435 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-23 19:43:15,435 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:43:15,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-23 19:43:15,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:43:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7998 backedges. 2740 proven. 105 refuted. 0 times theorem prover too weak. 5153 trivial. 0 not checked. [2024-10-23 19:43:15,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:43:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7998 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 7893 trivial. 0 not checked. [2024-10-23 19:43:15,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345345265] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:43:15,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:43:15,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2024-10-23 19:43:15,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405276559] [2024-10-23 19:43:15,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:43:15,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-23 19:43:15,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:43:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-23 19:43:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2024-10-23 19:43:15,997 INFO L87 Difference]: Start difference. First operand 156 states and 168 transitions. Second operand has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 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) [2024-10-23 19:43:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:43:16,095 INFO L93 Difference]: Finished difference Result 268 states and 310 transitions. [2024-10-23 19:43:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-10-23 19:43:16,096 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 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 291 [2024-10-23 19:43:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:43:16,097 INFO L225 Difference]: With dead ends: 268 [2024-10-23 19:43:16,097 INFO L226 Difference]: Without dead ends: 176 [2024-10-23 19:43:16,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2024-10-23 19:43:16,098 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:43:16,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 147 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:43:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-10-23 19:43:16,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2024-10-23 19:43:16,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0647058823529412) internal successors, (181), 170 states have internal predecessors, (181), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:43:16,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 187 transitions. [2024-10-23 19:43:16,106 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 187 transitions. Word has length 291 [2024-10-23 19:43:16,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:43:16,107 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 187 transitions. [2024-10-23 19:43:16,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.25531914893617) internal successors, (106), 47 states have internal predecessors, (106), 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) [2024-10-23 19:43:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 187 transitions. [2024-10-23 19:43:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2024-10-23 19:43:16,108 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:43:16,109 INFO L215 NwaCegarLoop]: trace histogram [66, 66, 60, 45, 30, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:43:16,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-23 19:43:16,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-23 19:43:16,309 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:43:16,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:43:16,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1234044249, now seen corresponding path program 10 times [2024-10-23 19:43:16,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:43:16,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430520511] [2024-10-23 19:43:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:43:16,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:43:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:16,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-23 19:43:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:17,034 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-10-23 19:43:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:17,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2024-10-23 19:43:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8943 backedges. 313 proven. 3345 refuted. 0 times theorem prover too weak. 5285 trivial. 0 not checked. [2024-10-23 19:43:17,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:43:17,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430520511] [2024-10-23 19:43:17,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430520511] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:43:17,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634519347] [2024-10-23 19:43:17,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 19:43:17,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:17,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:17,060 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:43:17,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-23 19:43:17,425 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 19:43:17,425 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:43:17,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-23 19:43:17,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:43:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8943 backedges. 2949 proven. 672 refuted. 0 times theorem prover too weak. 5322 trivial. 0 not checked. [2024-10-23 19:43:17,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:43:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8943 backedges. 43 proven. 3672 refuted. 0 times theorem prover too weak. 5228 trivial. 0 not checked. [2024-10-23 19:43:18,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634519347] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:43:18,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:43:18,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 24] total 33 [2024-10-23 19:43:18,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768857069] [2024-10-23 19:43:18,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:43:18,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-23 19:43:18,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:43:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-23 19:43:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-23 19:43:18,034 INFO L87 Difference]: Start difference. First operand 175 states and 187 transitions. Second operand has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 19:43:18,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:43:18,147 INFO L93 Difference]: Finished difference Result 334 states and 375 transitions. [2024-10-23 19:43:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-23 19:43:18,148 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 316 [2024-10-23 19:43:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:43:18,149 INFO L225 Difference]: With dead ends: 334 [2024-10-23 19:43:18,149 INFO L226 Difference]: Without dead ends: 223 [2024-10-23 19:43:18,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 610 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-10-23 19:43:18,150 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:43:18,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 57 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:43:18,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-10-23 19:43:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2024-10-23 19:43:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0504587155963303) internal successors, (229), 218 states have internal predecessors, (229), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:43:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 235 transitions. [2024-10-23 19:43:18,160 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 235 transitions. Word has length 316 [2024-10-23 19:43:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:43:18,160 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 235 transitions. [2024-10-23 19:43:18,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 19:43:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 235 transitions. [2024-10-23 19:43:18,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2024-10-23 19:43:18,162 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:43:18,162 INFO L215 NwaCegarLoop]: trace histogram [114, 114, 93, 60, 30, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:43:18,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-23 19:43:18,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-23 19:43:18,363 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:43:18,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:43:18,363 INFO L85 PathProgramCache]: Analyzing trace with hash 234906023, now seen corresponding path program 11 times [2024-10-23 19:43:18,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:43:18,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165255977] [2024-10-23 19:43:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:43:18,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:43:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:19,556 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-23 19:43:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:19,572 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2024-10-23 19:43:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:19,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2024-10-23 19:43:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21975 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 21510 trivial. 0 not checked. [2024-10-23 19:43:19,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:43:19,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165255977] [2024-10-23 19:43:19,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165255977] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:43:19,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197885100] [2024-10-23 19:43:19,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 19:43:19,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:19,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:19,606 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:43:19,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-23 19:43:19,887 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2024-10-23 19:43:19,887 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:43:19,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-23 19:43:19,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:43:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 21975 backedges. 9795 proven. 222 refuted. 0 times theorem prover too weak. 11958 trivial. 0 not checked. [2024-10-23 19:43:20,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:43:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21975 backedges. 975 proven. 3142 refuted. 0 times theorem prover too weak. 17858 trivial. 0 not checked. [2024-10-23 19:43:20,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197885100] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:43:20,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:43:20,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 16, 16] total 61 [2024-10-23 19:43:20,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566607188] [2024-10-23 19:43:20,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:43:20,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-23 19:43:20,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:43:20,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-23 19:43:20,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2698, Unknown=0, NotChecked=0, Total=3660 [2024-10-23 19:43:20,602 INFO L87 Difference]: Start difference. First operand 223 states and 235 transitions. Second operand has 61 states, 61 states have (on average 2.278688524590164) internal successors, (139), 61 states have internal predecessors, (139), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-23 19:43:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:43:20,760 INFO L93 Difference]: Finished difference Result 443 states and 509 transitions. [2024-10-23 19:43:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-10-23 19:43:20,761 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.278688524590164) internal successors, (139), 61 states have internal predecessors, (139), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 460 [2024-10-23 19:43:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:43:20,763 INFO L225 Difference]: With dead ends: 443 [2024-10-23 19:43:20,763 INFO L226 Difference]: Without dead ends: 284 [2024-10-23 19:43:20,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=962, Invalid=2698, Unknown=0, NotChecked=0, Total=3660 [2024-10-23 19:43:20,765 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:43:20,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 177 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:43:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-10-23 19:43:20,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2024-10-23 19:43:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.1111111111111112) internal successors, (310), 279 states have internal predecessors, (310), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:43:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 316 transitions. [2024-10-23 19:43:20,777 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 316 transitions. Word has length 460 [2024-10-23 19:43:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:43:20,777 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 316 transitions. [2024-10-23 19:43:20,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.278688524590164) internal successors, (139), 61 states have internal predecessors, (139), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-23 19:43:20,778 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 316 transitions. [2024-10-23 19:43:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2024-10-23 19:43:20,781 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:43:20,781 INFO L215 NwaCegarLoop]: trace histogram [174, 174, 93, 81, 60, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:43:20,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-23 19:43:20,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-23 19:43:20,982 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:43:20,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:43:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash -865224114, now seen corresponding path program 12 times [2024-10-23 19:43:20,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:43:20,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720637039] [2024-10-23 19:43:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:43:20,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:43:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:22,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-23 19:43:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:22,513 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2024-10-23 19:43:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:22,540 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2024-10-23 19:43:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:43:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 48016 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 47520 trivial. 0 not checked. [2024-10-23 19:43:22,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 19:43:22,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720637039] [2024-10-23 19:43:22,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720637039] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 19:43:22,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756011280] [2024-10-23 19:43:22,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 19:43:22,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:43:22,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 19:43:22,591 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 19:43:22,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-23 19:44:15,319 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-10-23 19:44:15,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 19:44:15,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-10-23 19:44:15,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 19:44:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 48016 backedges. 20426 proven. 496 refuted. 0 times theorem prover too weak. 27094 trivial. 0 not checked. [2024-10-23 19:44:15,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 19:44:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 48016 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 47520 trivial. 0 not checked. [2024-10-23 19:44:16,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756011280] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 19:44:16,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 19:44:16,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 62 [2024-10-23 19:44:16,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123847835] [2024-10-23 19:44:16,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 19:44:16,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-10-23 19:44:16,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 19:44:16,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-10-23 19:44:16,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2024-10-23 19:44:16,451 INFO L87 Difference]: Start difference. First operand 284 states and 316 transitions. Second operand has 62 states, 62 states have (on average 1.435483870967742) internal successors, (89), 62 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:44:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 19:44:16,530 INFO L93 Difference]: Finished difference Result 497 states and 585 transitions. [2024-10-23 19:44:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-10-23 19:44:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.435483870967742) internal successors, (89), 62 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 641 [2024-10-23 19:44:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 19:44:16,533 INFO L225 Difference]: With dead ends: 497 [2024-10-23 19:44:16,533 INFO L226 Difference]: Without dead ends: 312 [2024-10-23 19:44:16,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1320 GetRequests, 1255 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2024-10-23 19:44:16,535 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 19:44:16,536 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 108 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 19:44:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-10-23 19:44:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2024-10-23 19:44:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.1009771986970684) internal successors, (338), 307 states have internal predecessors, (338), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 19:44:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 344 transitions. [2024-10-23 19:44:16,547 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 344 transitions. Word has length 641 [2024-10-23 19:44:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 19:44:16,548 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 344 transitions. [2024-10-23 19:44:16,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.435483870967742) internal successors, (89), 62 states have internal predecessors, (89), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-23 19:44:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 344 transitions. [2024-10-23 19:44:16,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2024-10-23 19:44:16,553 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 19:44:16,553 INFO L215 NwaCegarLoop]: trace histogram [174, 174, 93, 81, 60, 59, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 19:44:16,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-23 19:44:16,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 19:44:16,754 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 19:44:16,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 19:44:16,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1139602958, now seen corresponding path program 13 times [2024-10-23 19:44:16,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 19:44:16,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992446750] [2024-10-23 19:44:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 19:44:16,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 19:44:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 19:44:18,572 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-10-23 19:44:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat