./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.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 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-12 14:59:51,624 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-12 14:59:51,691 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-12 14:59:51,696 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-12 14:59:51,697 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-12 14:59:51,727 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-12 14:59:51,728 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-12 14:59:51,728 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-12 14:59:51,729 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-12 14:59:51,729 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-12 14:59:51,730 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-12 14:59:51,730 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-12 14:59:51,731 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-12 14:59:51,736 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-12 14:59:51,736 INFO L153 SettingsManager]: * Use SBE=true [2024-10-12 14:59:51,736 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-12 14:59:51,736 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-12 14:59:51,737 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-12 14:59:51,737 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-12 14:59:51,737 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-12 14:59:51,737 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-12 14:59:51,739 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-12 14:59:51,740 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-12 14:59:51,740 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-12 14:59:51,740 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-12 14:59:51,740 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-12 14:59:51,741 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-12 14:59:51,741 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-12 14:59:51,741 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-12 14:59:51,741 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-12 14:59:51,742 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-12 14:59:51,742 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-12 14:59:51,742 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:59:51,742 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-12 14:59:51,743 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-12 14:59:51,743 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-12 14:59:51,744 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-12 14:59:51,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-12 14:59:51,744 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-12 14:59:51,745 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-12 14:59:51,745 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-12 14:59:51,745 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-12 14:59:51,746 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2024-10-12 14:59:52,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-12 14:59:52,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-12 14:59:52,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-12 14:59:52,048 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-12 14:59:52,049 INFO L274 PluginConnector]: CDTParser initialized [2024-10-12 14:59:52,050 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2024-10-12 14:59:53,516 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-12 14:59:53,691 INFO L384 CDTParser]: Found 1 translation units. [2024-10-12 14:59:53,692 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2024-10-12 14:59:53,699 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0859398f8/4ac8031c4cb2428cb9ba14d3f29978f3/FLAG2481e6e94 [2024-10-12 14:59:53,712 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0859398f8/4ac8031c4cb2428cb9ba14d3f29978f3 [2024-10-12 14:59:53,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-12 14:59:53,715 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-12 14:59:53,716 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-12 14:59:53,716 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-12 14:59:53,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-12 14:59:53,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:59:53" (1/1) ... [2024-10-12 14:59:53,724 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173f9556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:53, skipping insertion in model container [2024-10-12 14:59:53,726 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 02:59:53" (1/1) ... [2024-10-12 14:59:53,744 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-12 14:59:53,940 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2024-10-12 14:59:53,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:59:53,988 INFO L200 MainTranslator]: Completed pre-run [2024-10-12 14:59:53,998 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2024-10-12 14:59:54,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-12 14:59:54,018 INFO L204 MainTranslator]: Completed translation [2024-10-12 14:59:54,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54 WrapperNode [2024-10-12 14:59:54,019 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-12 14:59:54,020 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-12 14:59:54,020 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-12 14:59:54,020 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-12 14:59:54,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,030 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,046 INFO L138 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-10-12 14:59:54,046 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-12 14:59:54,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-12 14:59:54,047 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-12 14:59:54,047 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-12 14:59:54,055 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,055 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,057 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,067 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-12 14:59:54,067 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,078 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-12 14:59:54,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-12 14:59:54,082 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-12 14:59:54,082 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-12 14:59:54,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (1/1) ... [2024-10-12 14:59:54,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-12 14:59:54,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:59:54,115 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-12 14:59:54,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-12 14:59:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-12 14:59:54,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-12 14:59:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-12 14:59:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-12 14:59:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-12 14:59:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-12 14:59:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-12 14:59:54,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-12 14:59:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-12 14:59:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-12 14:59:54,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-12 14:59:54,226 INFO L238 CfgBuilder]: Building ICFG [2024-10-12 14:59:54,228 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-12 14:59:54,362 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-10-12 14:59:54,362 INFO L287 CfgBuilder]: Performing block encoding [2024-10-12 14:59:54,403 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-12 14:59:54,407 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-12 14:59:54,408 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:59:54 BoogieIcfgContainer [2024-10-12 14:59:54,408 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-12 14:59:54,410 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-12 14:59:54,410 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-12 14:59:54,413 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-12 14:59:54,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 02:59:53" (1/3) ... [2024-10-12 14:59:54,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1136f3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:59:54, skipping insertion in model container [2024-10-12 14:59:54,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 02:59:54" (2/3) ... [2024-10-12 14:59:54,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1136f3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 02:59:54, skipping insertion in model container [2024-10-12 14:59:54,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 02:59:54" (3/3) ... [2024-10-12 14:59:54,417 INFO L112 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2024-10-12 14:59:54,430 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-12 14:59:54,430 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-12 14:59:54,474 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-12 14:59:54,480 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;@6ad19adc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-12 14:59:54,480 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-12 14:59:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-12 14:59:54,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:59:54,489 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:59:54,489 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:59:54,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:59:54,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1300637357, now seen corresponding path program 1 times [2024-10-12 14:59:54,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:59:54,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695472287] [2024-10-12 14:59:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:59:54,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:59:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:59:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-12 14:59:54,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:59:54,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695472287] [2024-10-12 14:59:54,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695472287] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:59:54,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:59:54,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 14:59:54,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295093743] [2024-10-12 14:59:54,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:59:54,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:59:54,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:59:54,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:59:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:59:54,786 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:59:54,826 INFO L93 Difference]: Finished difference Result 31 states and 47 transitions. [2024-10-12 14:59:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:59:54,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-12 14:59:54,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:59:54,837 INFO L225 Difference]: With dead ends: 31 [2024-10-12 14:59:54,837 INFO L226 Difference]: Without dead ends: 15 [2024-10-12 14:59:54,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:59:54,845 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:59:54,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:59:54,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-10-12 14:59:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-10-12 14:59:54,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2024-10-12 14:59:54,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2024-10-12 14:59:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:59:54,879 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2024-10-12 14:59:54,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:54,879 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2024-10-12 14:59:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-12 14:59:54,881 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:59:54,881 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:59:54,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-12 14:59:54,881 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:59:54,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:59:54,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1084499837, now seen corresponding path program 1 times [2024-10-12 14:59:54,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:59:54,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534784707] [2024-10-12 14:59:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:59:54,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:59:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:59:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:59:54,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:59:54,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534784707] [2024-10-12 14:59:54,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534784707] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:59:54,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 14:59:54,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-12 14:59:54,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787650060] [2024-10-12 14:59:54,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:59:54,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:59:54,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:59:54,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:59:54,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:59:54,991 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:55,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:59:55,038 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-10-12 14:59:55,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:59:55,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-12 14:59:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:59:55,039 INFO L225 Difference]: With dead ends: 33 [2024-10-12 14:59:55,039 INFO L226 Difference]: Without dead ends: 25 [2024-10-12 14:59:55,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 14:59:55,041 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:59:55,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:59:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-12 14:59:55,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2024-10-12 14:59:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:55,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-10-12 14:59:55,050 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2024-10-12 14:59:55,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:59:55,051 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-10-12 14:59:55,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-10-12 14:59:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-12 14:59:55,053 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:59:55,053 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:59:55,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-12 14:59:55,054 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:59:55,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:59:55,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1547209917, now seen corresponding path program 1 times [2024-10-12 14:59:55,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:59:55,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543333526] [2024-10-12 14:59:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:59:55,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:59:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:59:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:59:55,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:59:55,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543333526] [2024-10-12 14:59:55,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543333526] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:59:55,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321683833] [2024-10-12 14:59:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:59:55,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:59:55,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:59:55,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:59:55,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-12 14:59:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:59:55,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-12 14:59:55,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:59:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:59:55,256 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-12 14:59:55,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321683833] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 14:59:55,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-12 14:59:55,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-12 14:59:55,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958253092] [2024-10-12 14:59:55,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 14:59:55,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 14:59:55,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:59:55,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 14:59:55,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:59:55,259 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:59:55,278 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2024-10-12 14:59:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 14:59:55,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-12 14:59:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:59:55,280 INFO L225 Difference]: With dead ends: 30 [2024-10-12 14:59:55,281 INFO L226 Difference]: Without dead ends: 16 [2024-10-12 14:59:55,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-12 14:59:55,282 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:59:55,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:59:55,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-10-12 14:59:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-10-12 14:59:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-10-12 14:59:55,287 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2024-10-12 14:59:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:59:55,287 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-10-12 14:59:55,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-10-12 14:59:55,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-12 14:59:55,288 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:59:55,288 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:59:55,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-12 14:59:55,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:59:55,489 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:59:55,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:59:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1938410753, now seen corresponding path program 1 times [2024-10-12 14:59:55,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:59:55,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952863813] [2024-10-12 14:59:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:59:55,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:59:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:59:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:59:55,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:59:55,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952863813] [2024-10-12 14:59:55,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952863813] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:59:55,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291853522] [2024-10-12 14:59:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:59:55,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:59:55,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:59:55,593 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:59:55,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-12 14:59:55,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:59:55,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:59:55,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:59:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:59:55,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:59:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-12 14:59:55,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291853522] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:59:55,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:59:55,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-10-12 14:59:55,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430403554] [2024-10-12 14:59:55,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:59:55,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-12 14:59:55,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:59:55,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-12 14:59:55,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-12 14:59:55,767 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:59:55,828 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2024-10-12 14:59:55,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-12 14:59:55,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-10-12 14:59:55,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:59:55,831 INFO L225 Difference]: With dead ends: 51 [2024-10-12 14:59:55,832 INFO L226 Difference]: Without dead ends: 38 [2024-10-12 14:59:55,832 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-12 14:59:55,834 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:59:55,835 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 39 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:59:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-12 14:59:55,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 22. [2024-10-12 14:59:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-10-12 14:59:55,844 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2024-10-12 14:59:55,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:59:55,845 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-10-12 14:59:55,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-10-12 14:59:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-12 14:59:55,845 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:59:55,846 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:59:55,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-12 14:59:56,046 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,SelfDestructingSolverStorable3 [2024-10-12 14:59:56,047 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:59:56,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:59:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash 308043518, now seen corresponding path program 2 times [2024-10-12 14:59:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:59:56,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279745253] [2024-10-12 14:59:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:59:56,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:59:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:59:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:59:56,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:59:56,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279745253] [2024-10-12 14:59:56,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279745253] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:59:56,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648259855] [2024-10-12 14:59:56,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 14:59:56,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:59:56,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:59:56,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:59:56,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-12 14:59:56,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 14:59:56,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:59:56,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-12 14:59:56,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:59:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:59:56,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:59:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:59:56,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648259855] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:59:56,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:59:56,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-12 14:59:56,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350967071] [2024-10-12 14:59:56,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:59:56,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-12 14:59:56,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:59:56,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-12 14:59:56,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2024-10-12 14:59:56,463 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:59:56,500 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-10-12 14:59:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-12 14:59:56,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-10-12 14:59:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:59:56,501 INFO L225 Difference]: With dead ends: 44 [2024-10-12 14:59:56,502 INFO L226 Difference]: Without dead ends: 28 [2024-10-12 14:59:56,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=142, Unknown=0, NotChecked=0, Total=272 [2024-10-12 14:59:56,503 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 14:59:56,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 14:59:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-12 14:59:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-12 14:59:56,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-10-12 14:59:56,511 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2024-10-12 14:59:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:59:56,511 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-10-12 14:59:56,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:56,512 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-10-12 14:59:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-12 14:59:56,512 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:59:56,512 INFO L215 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:59:56,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-12 14:59:56,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:59:56,713 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:59:56,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:59:56,714 INFO L85 PathProgramCache]: Analyzing trace with hash -326971746, now seen corresponding path program 3 times [2024-10-12 14:59:56,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:59:56,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191963164] [2024-10-12 14:59:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:59:56,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:59:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:59:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-12 14:59:57,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:59:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191963164] [2024-10-12 14:59:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191963164] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:59:57,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439542205] [2024-10-12 14:59:57,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 14:59:57,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:59:57,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:59:57,018 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:59:57,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-12 14:59:57,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-12 14:59:57,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:59:57,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-12 14:59:57,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:59:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-12 14:59:57,143 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:59:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-10-12 14:59:57,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439542205] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:59:57,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:59:57,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 19 [2024-10-12 14:59:57,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571313943] [2024-10-12 14:59:57,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:59:57,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-12 14:59:57,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:59:57,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-12 14:59:57,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-12 14:59:57,210 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:59:57,310 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2024-10-12 14:59:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-12 14:59:57,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-10-12 14:59:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:59:57,312 INFO L225 Difference]: With dead ends: 93 [2024-10-12 14:59:57,312 INFO L226 Difference]: Without dead ends: 77 [2024-10-12 14:59:57,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-10-12 14:59:57,313 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 67 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:59:57,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 67 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:59:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-12 14:59:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2024-10-12 14:59:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2024-10-12 14:59:57,325 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 25 [2024-10-12 14:59:57,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:59:57,325 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2024-10-12 14:59:57,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:57,326 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2024-10-12 14:59:57,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-12 14:59:57,327 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:59:57,327 INFO L215 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:59:57,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-12 14:59:57,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:59:57,528 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:59:57,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:59:57,528 INFO L85 PathProgramCache]: Analyzing trace with hash 529727645, now seen corresponding path program 4 times [2024-10-12 14:59:57,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:59:57,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449273561] [2024-10-12 14:59:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:59:57,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:59:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:59:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-12 14:59:57,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:59:57,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449273561] [2024-10-12 14:59:57,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449273561] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:59:57,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757580600] [2024-10-12 14:59:57,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 14:59:57,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:59:57,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:59:57,910 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:59:57,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-12 14:59:57,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 14:59:57,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:59:57,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-12 14:59:57,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:59:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-12 14:59:58,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 14:59:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-12 14:59:58,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757580600] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 14:59:58,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 14:59:58,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 28 [2024-10-12 14:59:58,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699180809] [2024-10-12 14:59:58,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 14:59:58,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-12 14:59:58,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 14:59:58,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-12 14:59:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2024-10-12 14:59:58,295 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 14:59:58,474 INFO L93 Difference]: Finished difference Result 186 states and 213 transitions. [2024-10-12 14:59:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-12 14:59:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2024-10-12 14:59:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 14:59:58,476 INFO L225 Difference]: With dead ends: 186 [2024-10-12 14:59:58,476 INFO L226 Difference]: Without dead ends: 158 [2024-10-12 14:59:58,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2024-10-12 14:59:58,478 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 179 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 14:59:58,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 132 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 14:59:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-10-12 14:59:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 66. [2024-10-12 14:59:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2024-10-12 14:59:58,487 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 38 [2024-10-12 14:59:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 14:59:58,487 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2024-10-12 14:59:58,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 14:59:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2024-10-12 14:59:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-12 14:59:58,489 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 14:59:58,489 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 14:59:58,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-12 14:59:58,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:59:58,694 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 14:59:58,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 14:59:58,694 INFO L85 PathProgramCache]: Analyzing trace with hash -329553154, now seen corresponding path program 5 times [2024-10-12 14:59:58,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 14:59:58,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942552470] [2024-10-12 14:59:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 14:59:58,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 14:59:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 14:59:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-10-12 14:59:59,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 14:59:59,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942552470] [2024-10-12 14:59:59,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942552470] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 14:59:59,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311720474] [2024-10-12 14:59:59,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 14:59:59,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 14:59:59,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 14:59:59,063 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-12 14:59:59,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-12 14:59:59,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-10-12 14:59:59,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 14:59:59,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-12 14:59:59,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 14:59:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-12 14:59:59,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:00:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-12 15:00:00,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311720474] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:00:00,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:00:00,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 45 [2024-10-12 15:00:00,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266032503] [2024-10-12 15:00:00,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:00:00,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-12 15:00:00,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:00,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-12 15:00:00,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2024-10-12 15:00:00,042 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 45 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:00,428 INFO L93 Difference]: Finished difference Result 371 states and 422 transitions. [2024-10-12 15:00:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-12 15:00:00,429 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-10-12 15:00:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:00,431 INFO L225 Difference]: With dead ends: 371 [2024-10-12 15:00:00,431 INFO L226 Difference]: Without dead ends: 319 [2024-10-12 15:00:00,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2024-10-12 15:00:00,435 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 599 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:00,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 205 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-12 15:00:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-10-12 15:00:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 115. [2024-10-12 15:00:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:00,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2024-10-12 15:00:00,462 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 63 [2024-10-12 15:00:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:00,462 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2024-10-12 15:00:00,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:00,462 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2024-10-12 15:00:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-10-12 15:00:00,469 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:00,469 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:00,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-12 15:00:00,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:00,670 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:00,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1259011773, now seen corresponding path program 6 times [2024-10-12 15:00:00,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:00,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598414560] [2024-10-12 15:00:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:00,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2024-10-12 15:00:01,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:01,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598414560] [2024-10-12 15:00:01,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598414560] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:01,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024499743] [2024-10-12 15:00:01,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-12 15:00:01,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:01,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:01,042 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) [2024-10-12 15:00:01,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-12 15:00:01,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-12 15:00:01,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:00:01,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-12 15:00:01,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:00:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1367 trivial. 0 not checked. [2024-10-12 15:00:01,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:00:01,826 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-12 15:00:01,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 11 [2024-10-12 15:00:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 1367 trivial. 0 not checked. [2024-10-12 15:00:01,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024499743] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:00:01,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:00:01,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 26 [2024-10-12 15:00:01,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421744419] [2024-10-12 15:00:01,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:00:01,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-12 15:00:01,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:01,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-12 15:00:01,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2024-10-12 15:00:01,867 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:02,175 INFO L93 Difference]: Finished difference Result 221 states and 229 transitions. [2024-10-12 15:00:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-12 15:00:02,176 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2024-10-12 15:00:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:02,177 INFO L225 Difference]: With dead ends: 221 [2024-10-12 15:00:02,177 INFO L226 Difference]: Without dead ends: 121 [2024-10-12 15:00:02,178 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=411, Invalid=1311, Unknown=0, NotChecked=0, Total=1722 [2024-10-12 15:00:02,179 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:02,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 56 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:00:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-12 15:00:02,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2024-10-12 15:00:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 118 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 123 transitions. [2024-10-12 15:00:02,197 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 123 transitions. Word has length 112 [2024-10-12 15:00:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:02,198 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 123 transitions. [2024-10-12 15:00:02,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 123 transitions. [2024-10-12 15:00:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-10-12 15:00:02,201 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:02,202 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:02,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-12 15:00:02,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:02,406 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:02,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:02,406 INFO L85 PathProgramCache]: Analyzing trace with hash 119331897, now seen corresponding path program 1 times [2024-10-12 15:00:02,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:02,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270541086] [2024-10-12 15:00:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:02,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1440 trivial. 0 not checked. [2024-10-12 15:00:02,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:02,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270541086] [2024-10-12 15:00:02,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270541086] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-12 15:00:02,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-12 15:00:02,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-12 15:00:02,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265152571] [2024-10-12 15:00:02,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-12 15:00:02,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-12 15:00:02,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:02,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-12 15:00:02,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 15:00:02,481 INFO L87 Difference]: Start difference. First operand 119 states and 123 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:02,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:02,490 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2024-10-12 15:00:02,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-12 15:00:02,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2024-10-12 15:00:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:02,491 INFO L225 Difference]: With dead ends: 126 [2024-10-12 15:00:02,492 INFO L226 Difference]: Without dead ends: 119 [2024-10-12 15:00:02,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-12 15:00:02,492 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:02,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 13 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:00:02,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-10-12 15:00:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-10-12 15:00:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:02,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2024-10-12 15:00:02,502 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2024-10-12 15:00:02,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:02,502 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2024-10-12 15:00:02,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2024-10-12 15:00:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-10-12 15:00:02,504 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:02,504 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:02,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-12 15:00:02,504 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:02,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1370180029, now seen corresponding path program 1 times [2024-10-12 15:00:02,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:02,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246887594] [2024-10-12 15:00:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:02,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-12 15:00:02,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:02,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246887594] [2024-10-12 15:00:02,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246887594] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:02,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473564937] [2024-10-12 15:00:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:02,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:02,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:02,970 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) [2024-10-12 15:00:02,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-12 15:00:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:03,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-12 15:00:03,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:00:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-12 15:00:03,338 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:00:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-12 15:00:03,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473564937] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:00:03,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:00:03,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2024-10-12 15:00:03,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938133323] [2024-10-12 15:00:03,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:00:03,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-10-12 15:00:03,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:03,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-10-12 15:00:03,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=1172, Unknown=0, NotChecked=0, Total=2162 [2024-10-12 15:00:03,705 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:03,752 INFO L93 Difference]: Finished difference Result 238 states and 257 transitions. [2024-10-12 15:00:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-12 15:00:03,752 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2024-10-12 15:00:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:03,755 INFO L225 Difference]: With dead ends: 238 [2024-10-12 15:00:03,755 INFO L226 Difference]: Without dead ends: 135 [2024-10-12 15:00:03,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=1172, Unknown=0, NotChecked=0, Total=2162 [2024-10-12 15:00:03,756 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:03,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-12 15:00:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-10-12 15:00:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-10-12 15:00:03,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2024-10-12 15:00:03,774 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 118 [2024-10-12 15:00:03,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:03,776 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2024-10-12 15:00:03,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:03,777 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2024-10-12 15:00:03,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-10-12 15:00:03,782 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:03,783 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:03,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-12 15:00:03,984 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,SelfDestructingSolverStorable10 [2024-10-12 15:00:03,984 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:03,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:03,985 INFO L85 PathProgramCache]: Analyzing trace with hash -875874493, now seen corresponding path program 2 times [2024-10-12 15:00:03,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:03,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686582266] [2024-10-12 15:00:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:03,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1803 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-12 15:00:04,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:04,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686582266] [2024-10-12 15:00:04,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686582266] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:04,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205023125] [2024-10-12 15:00:04,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-12 15:00:04,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:04,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:04,949 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) [2024-10-12 15:00:04,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-12 15:00:05,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-12 15:00:05,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:00:05,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-12 15:00:05,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:00:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1803 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-12 15:00:05,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:00:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1803 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-12 15:00:07,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205023125] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:00:07,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:00:07,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2024-10-12 15:00:07,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647555421] [2024-10-12 15:00:07,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:00:07,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-10-12 15:00:07,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:07,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-10-12 15:00:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4030, Invalid=4900, Unknown=0, NotChecked=0, Total=8930 [2024-10-12 15:00:07,110 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 95 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:07,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:07,206 INFO L93 Difference]: Finished difference Result 270 states and 305 transitions. [2024-10-12 15:00:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-10-12 15:00:07,207 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2024-10-12 15:00:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:07,208 INFO L225 Difference]: With dead ends: 270 [2024-10-12 15:00:07,208 INFO L226 Difference]: Without dead ends: 167 [2024-10-12 15:00:07,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4030, Invalid=4900, Unknown=0, NotChecked=0, Total=8930 [2024-10-12 15:00:07,213 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:07,213 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:00:07,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-12 15:00:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2024-10-12 15:00:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:07,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2024-10-12 15:00:07,233 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 134 [2024-10-12 15:00:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:07,233 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2024-10-12 15:00:07,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2024-10-12 15:00:07,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-10-12 15:00:07,235 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:07,236 INFO L215 NwaCegarLoop]: trace histogram [62, 30, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:07,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-12 15:00:07,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:07,436 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:07,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:07,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1364343107, now seen corresponding path program 3 times [2024-10-12 15:00:07,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:07,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081923678] [2024-10-12 15:00:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:07,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 1338 trivial. 0 not checked. [2024-10-12 15:00:10,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081923678] [2024-10-12 15:00:10,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081923678] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:10,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993415867] [2024-10-12 15:00:10,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-12 15:00:10,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:10,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:10,348 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) [2024-10-12 15:00:10,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-12 15:00:10,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-12 15:00:10,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:00:10,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-12 15:00:10,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:00:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 3143 trivial. 0 not checked. [2024-10-12 15:00:11,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:00:11,337 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-12 15:00:11,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 11 [2024-10-12 15:00:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3291 backedges. 28 proven. 120 refuted. 0 times theorem prover too weak. 3143 trivial. 0 not checked. [2024-10-12 15:00:11,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993415867] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:00:11,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:00:11,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 9, 9] total 80 [2024-10-12 15:00:11,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26183729] [2024-10-12 15:00:11,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:00:11,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-10-12 15:00:11,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:11,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-10-12 15:00:11,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2135, Invalid=4185, Unknown=0, NotChecked=0, Total=6320 [2024-10-12 15:00:11,403 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 80 states, 80 states have (on average 1.5125) internal successors, (121), 80 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:13,579 INFO L93 Difference]: Finished difference Result 278 states and 283 transitions. [2024-10-12 15:00:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-10-12 15:00:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.5125) internal successors, (121), 80 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2024-10-12 15:00:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:13,581 INFO L225 Difference]: With dead ends: 278 [2024-10-12 15:00:13,581 INFO L226 Difference]: Without dead ends: 175 [2024-10-12 15:00:13,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6312, Invalid=14568, Unknown=0, NotChecked=0, Total=20880 [2024-10-12 15:00:13,586 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:13,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 100 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-12 15:00:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-10-12 15:00:13,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2024-10-12 15:00:13,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2024-10-12 15:00:13,598 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 166 [2024-10-12 15:00:13,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:13,599 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2024-10-12 15:00:13,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.5125) internal successors, (121), 80 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2024-10-12 15:00:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-10-12 15:00:13,601 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:13,601 INFO L215 NwaCegarLoop]: trace histogram [63, 30, 30, 30, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:13,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-12 15:00:13,801 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,SelfDestructingSolverStorable12 [2024-10-12 15:00:13,802 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:13,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:13,802 INFO L85 PathProgramCache]: Analyzing trace with hash -570168771, now seen corresponding path program 4 times [2024-10-12 15:00:13,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:13,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797908721] [2024-10-12 15:00:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:13,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 1346 trivial. 0 not checked. [2024-10-12 15:00:17,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:17,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797908721] [2024-10-12 15:00:17,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797908721] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:17,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932771391] [2024-10-12 15:00:17,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-12 15:00:17,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:17,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:17,055 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) [2024-10-12 15:00:17,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-12 15:00:17,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-12 15:00:17,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-12 15:00:17,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-12 15:00:17,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-12 15:00:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2024-10-12 15:00:18,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-12 15:00:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2024-10-12 15:00:20,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932771391] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-12 15:00:20,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-12 15:00:20,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 33, 33] total 128 [2024-10-12 15:00:20,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045682988] [2024-10-12 15:00:20,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-12 15:00:20,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-10-12 15:00:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-12 15:00:20,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-10-12 15:00:20,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2024-10-12 15:00:20,275 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 128 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-12 15:00:21,101 INFO L93 Difference]: Finished difference Result 794 states and 830 transitions. [2024-10-12 15:00:21,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-10-12 15:00:21,102 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 128 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2024-10-12 15:00:21,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-12 15:00:21,104 INFO L225 Difference]: With dead ends: 794 [2024-10-12 15:00:21,104 INFO L226 Difference]: Without dead ends: 686 [2024-10-12 15:00:21,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2024-10-12 15:00:21,106 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 1582 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-12 15:00:21,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1582 Valid, 367 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-12 15:00:21,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2024-10-12 15:00:21,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 270. [2024-10-12 15:00:21,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.0111524163568772) internal successors, (272), 269 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2024-10-12 15:00:21,124 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 172 [2024-10-12 15:00:21,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-12 15:00:21,125 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2024-10-12 15:00:21,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0703125) internal successors, (265), 128 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-12 15:00:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2024-10-12 15:00:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-10-12 15:00:21,127 INFO L207 NwaCegarLoop]: Found error trace [2024-10-12 15:00:21,128 INFO L215 NwaCegarLoop]: trace histogram [64, 62, 62, 62, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-12 15:00:21,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-12 15:00:21,328 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,SelfDestructingSolverStorable13 [2024-10-12 15:00:21,328 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-12 15:00:21,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-12 15:00:21,329 INFO L85 PathProgramCache]: Analyzing trace with hash -281988898, now seen corresponding path program 5 times [2024-10-12 15:00:21,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-12 15:00:21,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819893224] [2024-10-12 15:00:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-12 15:00:21,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-12 15:00:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-12 15:00:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7826 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 5746 trivial. 0 not checked. [2024-10-12 15:00:24,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-12 15:00:24,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819893224] [2024-10-12 15:00:24,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819893224] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-12 15:00:24,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550271149] [2024-10-12 15:00:24,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-12 15:00:24,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-12 15:00:24,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-12 15:00:24,625 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) [2024-10-12 15:00:24,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process