./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg20-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg20-2.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 61bc8e70ac867c6ac52806e5ae8f7e7cefd73775be941aab831dd9bf86f7dc88 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-10 21:57:22,576 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-10 21:57:22,654 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-10 21:57:22,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-10 21:57:22,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-10 21:57:22,691 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-10 21:57:22,692 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-10 21:57:22,692 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-10 21:57:22,693 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-10 21:57:22,693 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-10 21:57:22,694 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-10 21:57:22,694 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-10 21:57:22,695 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-10 21:57:22,695 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-10 21:57:22,695 INFO L153 SettingsManager]: * Use SBE=true [2024-10-10 21:57:22,696 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-10 21:57:22,696 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-10 21:57:22,697 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-10 21:57:22,697 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-10 21:57:22,697 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-10 21:57:22,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-10 21:57:22,698 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-10 21:57:22,699 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-10 21:57:22,699 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-10 21:57:22,699 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-10 21:57:22,700 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-10 21:57:22,700 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-10 21:57:22,700 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-10 21:57:22,701 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-10 21:57:22,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-10 21:57:22,701 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-10 21:57:22,702 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-10 21:57:22,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:57:22,717 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-10 21:57:22,718 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-10 21:57:22,718 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-10 21:57:22,718 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-10 21:57:22,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-10 21:57:22,719 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-10 21:57:22,719 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-10 21:57:22,719 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-10 21:57:22,720 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-10 21:57:22,720 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61bc8e70ac867c6ac52806e5ae8f7e7cefd73775be941aab831dd9bf86f7dc88 [2024-10-10 21:57:22,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-10 21:57:23,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-10 21:57:23,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-10 21:57:23,011 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-10 21:57:23,012 INFO L274 PluginConnector]: CDTParser initialized [2024-10-10 21:57:23,013 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg20-2.i [2024-10-10 21:57:24,585 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-10 21:57:24,778 INFO L384 CDTParser]: Found 1 translation units. [2024-10-10 21:57:24,779 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg20-2.i [2024-10-10 21:57:24,786 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/e11c4daed/5a88ca9a44f34bd582151875e876bc75/FLAG3423023f8 [2024-10-10 21:57:24,798 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/e11c4daed/5a88ca9a44f34bd582151875e876bc75 [2024-10-10 21:57:24,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-10 21:57:24,801 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-10 21:57:24,803 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-10 21:57:24,803 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-10 21:57:24,809 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-10 21:57:24,810 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:57:24" (1/1) ... [2024-10-10 21:57:24,811 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35618015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:24, skipping insertion in model container [2024-10-10 21:57:24,812 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.10 09:57:24" (1/1) ... [2024-10-10 21:57:24,838 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-10 21:57:25,031 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg20-2.i[1282,1295] [2024-10-10 21:57:25,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:57:25,043 INFO L200 MainTranslator]: Completed pre-run [2024-10-10 21:57:25,069 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg20-2.i[1282,1295] [2024-10-10 21:57:25,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-10 21:57:25,085 INFO L204 MainTranslator]: Completed translation [2024-10-10 21:57:25,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25 WrapperNode [2024-10-10 21:57:25,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-10 21:57:25,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-10 21:57:25,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-10 21:57:25,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-10 21:57:25,093 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,102 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,120 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-10-10 21:57:25,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-10 21:57:25,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-10 21:57:25,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-10 21:57:25,123 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-10 21:57:25,133 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,136 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,150 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-10-10 21:57:25,151 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,152 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,158 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,161 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,163 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,164 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,165 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-10 21:57:25,166 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-10 21:57:25,167 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-10 21:57:25,167 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-10 21:57:25,167 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (1/1) ... [2024-10-10 21:57:25,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-10 21:57:25,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:25,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-10 21:57:25,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-10 21:57:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-10 21:57:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-10 21:57:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-10 21:57:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-10 21:57:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-10 21:57:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-10 21:57:25,252 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2024-10-10 21:57:25,252 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2024-10-10 21:57:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-10 21:57:25,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-10 21:57:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-10 21:57:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-10 21:57:25,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-10 21:57:25,364 INFO L238 CfgBuilder]: Building ICFG [2024-10-10 21:57:25,368 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-10 21:57:25,562 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-10-10 21:57:25,562 INFO L287 CfgBuilder]: Performing block encoding [2024-10-10 21:57:25,594 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-10 21:57:25,595 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-10 21:57:25,595 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:57:25 BoogieIcfgContainer [2024-10-10 21:57:25,595 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-10 21:57:25,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-10 21:57:25,599 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-10 21:57:25,602 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-10 21:57:25,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.10 09:57:24" (1/3) ... [2024-10-10 21:57:25,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e200712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:57:25, skipping insertion in model container [2024-10-10 21:57:25,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.10 09:57:25" (2/3) ... [2024-10-10 21:57:25,605 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e200712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.10 09:57:25, skipping insertion in model container [2024-10-10 21:57:25,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.10 09:57:25" (3/3) ... [2024-10-10 21:57:25,607 INFO L112 eAbstractionObserver]: Analyzing ICFG avg20-2.i [2024-10-10 21:57:25,625 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-10 21:57:25,626 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-10 21:57:25,686 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-10 21:57:25,693 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;@2d3e3e9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-10 21:57:25,693 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-10 21:57:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:25,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-10 21:57:25,707 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:25,709 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:25,710 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:25,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1444276640, now seen corresponding path program 1 times [2024-10-10 21:57:25,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:25,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294322829] [2024-10-10 21:57:25,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:25,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:26,029 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-10 21:57:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:26,071 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-10 21:57:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:26,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-10 21:57:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 21:57:26,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:26,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294322829] [2024-10-10 21:57:26,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294322829] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:26,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942229210] [2024-10-10 21:57:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:26,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:26,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:26,117 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:26,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-10 21:57:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:26,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-10-10 21:57:26,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-10 21:57:26,216 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:57:26,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942229210] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:57:26,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:57:26,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2024-10-10 21:57:26,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122088975] [2024-10-10 21:57:26,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:57:26,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-10 21:57:26,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:26,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-10 21:57:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 21:57:26,248 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:26,277 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2024-10-10 21:57:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-10 21:57:26,280 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-10-10 21:57:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:26,288 INFO L225 Difference]: With dead ends: 38 [2024-10-10 21:57:26,288 INFO L226 Difference]: Without dead ends: 18 [2024-10-10 21:57:26,291 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-10 21:57:26,298 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:26,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-10 21:57:26,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-10 21:57:26,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-10-10 21:57:26,382 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 25 [2024-10-10 21:57:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:26,384 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-10-10 21:57:26,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-10-10 21:57:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-10 21:57:26,387 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:26,387 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:26,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-10 21:57:26,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-10 21:57:26,588 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:26,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:26,589 INFO L85 PathProgramCache]: Analyzing trace with hash -265195610, now seen corresponding path program 1 times [2024-10-10 21:57:26,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:26,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250850956] [2024-10-10 21:57:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:26,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:26,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-10 21:57:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:26,746 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-10 21:57:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:26,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-10-10 21:57:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:26,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 21:57:26,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:26,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250850956] [2024-10-10 21:57:26,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250850956] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:26,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006739569] [2024-10-10 21:57:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:26,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:26,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:26,785 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:26,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-10 21:57:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:26,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 21:57:26,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-10 21:57:26,904 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:57:26,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006739569] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:57:26,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:57:26,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-10-10 21:57:26,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241176531] [2024-10-10 21:57:26,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:57:26,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:57:26,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:26,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:57:26,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:26,909 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 21:57:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:26,938 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2024-10-10 21:57:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:57:26,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-10-10 21:57:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:26,940 INFO L225 Difference]: With dead ends: 35 [2024-10-10 21:57:26,940 INFO L226 Difference]: Without dead ends: 19 [2024-10-10 21:57:26,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:26,943 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:26,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-10 21:57:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-10 21:57:26,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2024-10-10 21:57:26,953 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 25 [2024-10-10 21:57:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:26,953 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2024-10-10 21:57:26,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-10 21:57:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2024-10-10 21:57:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-10 21:57:26,954 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:26,954 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:26,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-10 21:57:27,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:27,156 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:27,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:27,156 INFO L85 PathProgramCache]: Analyzing trace with hash 774126172, now seen corresponding path program 1 times [2024-10-10 21:57:27,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:27,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713474936] [2024-10-10 21:57:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:27,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:27,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 21:57:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:27,268 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-10-10 21:57:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:27,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-10 21:57:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-10 21:57:27,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:27,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713474936] [2024-10-10 21:57:27,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713474936] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:27,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117568462] [2024-10-10 21:57:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:27,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:27,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:27,286 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:27,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-10 21:57:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:27,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 21:57:27,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-10 21:57:27,376 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:57:27,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117568462] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:57:27,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:57:27,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2024-10-10 21:57:27,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658578439] [2024-10-10 21:57:27,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:57:27,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:57:27,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:57:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:27,380 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:27,403 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2024-10-10 21:57:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:57:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-10 21:57:27,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:27,405 INFO L225 Difference]: With dead ends: 34 [2024-10-10 21:57:27,405 INFO L226 Difference]: Without dead ends: 20 [2024-10-10 21:57:27,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:27,407 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:27,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-10 21:57:27,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-10 21:57:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-10 21:57:27,418 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 26 [2024-10-10 21:57:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:27,420 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-10 21:57:27,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:27,421 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-10 21:57:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-10 21:57:27,422 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:27,422 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:27,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-10 21:57:27,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:27,627 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:27,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:27,628 INFO L85 PathProgramCache]: Analyzing trace with hash 406480427, now seen corresponding path program 1 times [2024-10-10 21:57:27,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:27,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232354958] [2024-10-10 21:57:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:27,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:27,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 21:57:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:27,751 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-10 21:57:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:27,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-10 21:57:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-10 21:57:27,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:27,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232354958] [2024-10-10 21:57:27,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232354958] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:27,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407352834] [2024-10-10 21:57:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:27,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:27,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:27,782 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:27,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-10 21:57:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:27,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-10 21:57:27,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-10 21:57:27,876 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-10 21:57:27,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407352834] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-10 21:57:27,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-10 21:57:27,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-10-10 21:57:27,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416138029] [2024-10-10 21:57:27,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-10 21:57:27,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-10 21:57:27,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:27,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-10 21:57:27,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:27,878 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:27,896 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-10-10 21:57:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-10 21:57:27,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2024-10-10 21:57:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:27,898 INFO L225 Difference]: With dead ends: 32 [2024-10-10 21:57:27,898 INFO L226 Difference]: Without dead ends: 21 [2024-10-10 21:57:27,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-10 21:57:27,899 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:27,900 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-10 21:57:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-10 21:57:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:27,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-10-10 21:57:27,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 29 [2024-10-10 21:57:27,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:27,905 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-10-10 21:57:27,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-10 21:57:27,905 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-10-10 21:57:27,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-10 21:57:27,906 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:27,910 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:27,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-10 21:57:28,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:28,112 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:28,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:28,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1488649810, now seen corresponding path program 1 times [2024-10-10 21:57:28,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:28,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101289909] [2024-10-10 21:57:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:28,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:28,191 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-10 21:57:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:28,201 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-10 21:57:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:28,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-10 21:57:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 21:57:28,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:28,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101289909] [2024-10-10 21:57:28,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101289909] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:28,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703100081] [2024-10-10 21:57:28,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:28,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:28,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:28,218 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:28,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-10 21:57:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:28,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-10 21:57:28,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 21:57:28,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 21:57:28,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703100081] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:28,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:28,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-10-10 21:57:28,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594417574] [2024-10-10 21:57:28,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:28,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-10 21:57:28,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-10 21:57:28,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:57:28,390 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:57:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:28,418 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2024-10-10 21:57:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-10 21:57:28,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2024-10-10 21:57:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:28,419 INFO L225 Difference]: With dead ends: 42 [2024-10-10 21:57:28,419 INFO L226 Difference]: Without dead ends: 24 [2024-10-10 21:57:28,419 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-10 21:57:28,420 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:28,420 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-10-10 21:57:28,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-10-10 21:57:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-10-10 21:57:28,425 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2024-10-10 21:57:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:28,425 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-10-10 21:57:28,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:57:28,426 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-10-10 21:57:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-10 21:57:28,427 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:28,427 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:28,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-10 21:57:28,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:28,631 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:28,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:28,631 INFO L85 PathProgramCache]: Analyzing trace with hash -944391140, now seen corresponding path program 2 times [2024-10-10 21:57:28,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:28,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274463284] [2024-10-10 21:57:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:28,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:28,704 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-10 21:57:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:28,747 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-10 21:57:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:28,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-10 21:57:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-10 21:57:28,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274463284] [2024-10-10 21:57:28,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274463284] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574064113] [2024-10-10 21:57:28,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 21:57:28,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:28,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:28,811 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:28,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-10 21:57:28,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 21:57:28,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:28,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-10 21:57:28,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 21:57:28,942 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-10 21:57:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574064113] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:29,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:29,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-10-10 21:57:29,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296633810] [2024-10-10 21:57:29,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:29,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-10 21:57:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-10 21:57:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 21:57:29,023 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-10 21:57:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:29,059 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2024-10-10 21:57:29,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-10 21:57:29,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2024-10-10 21:57:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:29,060 INFO L225 Difference]: With dead ends: 49 [2024-10-10 21:57:29,060 INFO L226 Difference]: Without dead ends: 31 [2024-10-10 21:57:29,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-10-10 21:57:29,062 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:29,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-10-10 21:57:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-10-10 21:57:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-10-10 21:57:29,068 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 33 [2024-10-10 21:57:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:29,068 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-10-10 21:57:29,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2024-10-10 21:57:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-10-10 21:57:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-10 21:57:29,069 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:29,069 INFO L215 NwaCegarLoop]: trace histogram [10, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:29,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-10 21:57:29,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-10 21:57:29,270 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:29,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1083945041, now seen corresponding path program 3 times [2024-10-10 21:57:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:29,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729404323] [2024-10-10 21:57:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:29,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:29,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:57:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:29,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-10-10 21:57:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:29,372 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-10 21:57:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-10 21:57:29,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729404323] [2024-10-10 21:57:29,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729404323] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653534578] [2024-10-10 21:57:29,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 21:57:29,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:29,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:29,382 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:29,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-10 21:57:29,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-10 21:57:29,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:29,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 21:57:29,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 21:57:29,489 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-10-10 21:57:29,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653534578] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:29,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:29,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2024-10-10 21:57:29,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412662555] [2024-10-10 21:57:29,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:29,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-10 21:57:29,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:29,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-10 21:57:29,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-10 21:57:29,539 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 21:57:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:29,583 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2024-10-10 21:57:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-10 21:57:29,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-10-10 21:57:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:29,587 INFO L225 Difference]: With dead ends: 53 [2024-10-10 21:57:29,587 INFO L226 Difference]: Without dead ends: 36 [2024-10-10 21:57:29,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-10 21:57:29,588 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:29,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:29,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-10 21:57:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-10-10 21:57:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-10-10 21:57:29,594 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2024-10-10 21:57:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:29,595 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-10-10 21:57:29,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 21:57:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-10-10 21:57:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-10 21:57:29,596 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:29,596 INFO L215 NwaCegarLoop]: trace histogram [18, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:29,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-10 21:57:29,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:29,797 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:29,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:29,798 INFO L85 PathProgramCache]: Analyzing trace with hash -407743002, now seen corresponding path program 4 times [2024-10-10 21:57:29,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:29,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866273119] [2024-10-10 21:57:29,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:29,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:30,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-10 21:57:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:30,060 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-10-10 21:57:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:30,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-10 21:57:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-10 21:57:30,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:30,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866273119] [2024-10-10 21:57:30,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866273119] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:30,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669590132] [2024-10-10 21:57:30,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-10 21:57:30,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:30,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:30,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:30,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-10 21:57:30,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-10 21:57:30,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:30,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-10 21:57:30,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-10 21:57:30,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-10-10 21:57:30,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669590132] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:30,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:30,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 23 [2024-10-10 21:57:30,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986310792] [2024-10-10 21:57:30,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:30,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-10 21:57:30,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:30,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-10 21:57:30,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-10-10 21:57:30,468 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:57:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:30,526 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-10-10 21:57:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-10 21:57:30,527 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2024-10-10 21:57:30,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:30,528 INFO L225 Difference]: With dead ends: 70 [2024-10-10 21:57:30,528 INFO L226 Difference]: Without dead ends: 46 [2024-10-10 21:57:30,528 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2024-10-10 21:57:30,529 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:30,529 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:30,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-10 21:57:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-10 21:57:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-10-10 21:57:30,542 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 55 [2024-10-10 21:57:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:30,542 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-10-10 21:57:30,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-10-10 21:57:30,542 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-10-10 21:57:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-10-10 21:57:30,544 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:30,544 INFO L215 NwaCegarLoop]: trace histogram [20, 18, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:30,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-10 21:57:30,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-10 21:57:30,745 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:30,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:30,745 INFO L85 PathProgramCache]: Analyzing trace with hash 581998502, now seen corresponding path program 5 times [2024-10-10 21:57:30,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:30,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260611253] [2024-10-10 21:57:30,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:30,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:30,929 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-10 21:57:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:30,992 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-10 21:57:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:31,001 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-10-10 21:57:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2024-10-10 21:57:31,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260611253] [2024-10-10 21:57:31,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260611253] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626818918] [2024-10-10 21:57:31,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-10 21:57:31,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:31,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:31,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-10 21:57:31,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-10-10 21:57:31,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:31,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 21:57:31,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2024-10-10 21:57:31,541 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2024-10-10 21:57:31,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626818918] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:31,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:31,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-10-10 21:57:31,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144249161] [2024-10-10 21:57:31,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:31,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-10 21:57:31,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:31,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-10 21:57:31,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-10-10 21:57:31,665 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:57:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:31,714 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2024-10-10 21:57:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-10 21:57:31,715 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 65 [2024-10-10 21:57:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:31,716 INFO L225 Difference]: With dead ends: 76 [2024-10-10 21:57:31,716 INFO L226 Difference]: Without dead ends: 54 [2024-10-10 21:57:31,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-10-10 21:57:31,717 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:31,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-10 21:57:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-10-10 21:57:31,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2024-10-10 21:57:31,725 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 65 [2024-10-10 21:57:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:31,725 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2024-10-10 21:57:31,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:57:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2024-10-10 21:57:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-10-10 21:57:31,727 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:31,728 INFO L215 NwaCegarLoop]: trace histogram [42, 20, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:31,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-10 21:57:31,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:31,928 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:31,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:31,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1574648870, now seen corresponding path program 6 times [2024-10-10 21:57:31,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:31,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606304977] [2024-10-10 21:57:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:31,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:32,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-10 21:57:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:32,491 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-10 21:57:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:32,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-10-10 21:57:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2024-10-10 21:57:32,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:32,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606304977] [2024-10-10 21:57:32,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606304977] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:32,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700529949] [2024-10-10 21:57:32,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-10 21:57:32,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:32,529 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:32,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-10 21:57:32,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-10 21:57:32,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:32,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-10 21:57:32,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 456 proven. 3 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2024-10-10 21:57:32,712 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1212 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1209 trivial. 0 not checked. [2024-10-10 21:57:32,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700529949] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:32,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:32,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2024-10-10 21:57:32,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848698175] [2024-10-10 21:57:32,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:32,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-10 21:57:32,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:32,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-10 21:57:32,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2024-10-10 21:57:32,780 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 21:57:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:32,829 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2024-10-10 21:57:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-10 21:57:32,829 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2024-10-10 21:57:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:32,830 INFO L225 Difference]: With dead ends: 89 [2024-10-10 21:57:32,830 INFO L226 Difference]: Without dead ends: 59 [2024-10-10 21:57:32,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2024-10-10 21:57:32,832 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:32,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 104 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-10 21:57:32,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-10-10 21:57:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2024-10-10 21:57:32,842 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 89 [2024-10-10 21:57:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:32,842 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2024-10-10 21:57:32,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-10 21:57:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2024-10-10 21:57:32,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-10-10 21:57:32,844 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:32,844 INFO L215 NwaCegarLoop]: trace histogram [45, 20, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:32,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-10 21:57:33,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-10 21:57:33,045 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:33,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash -299178399, now seen corresponding path program 7 times [2024-10-10 21:57:33,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:33,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647993922] [2024-10-10 21:57:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:33,381 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-10 21:57:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:33,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-10-10 21:57:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:33,621 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-10-10 21:57:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2024-10-10 21:57:33,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:33,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647993922] [2024-10-10 21:57:33,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647993922] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:33,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47784605] [2024-10-10 21:57:33,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-10 21:57:33,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:33,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:33,637 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:33,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-10 21:57:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:33,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-10 21:57:33,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 514 proven. 120 refuted. 0 times theorem prover too weak. 734 trivial. 0 not checked. [2024-10-10 21:57:33,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 636 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2024-10-10 21:57:34,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47784605] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:34,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:34,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 22 [2024-10-10 21:57:34,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983030668] [2024-10-10 21:57:34,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:34,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-10 21:57:34,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:34,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-10 21:57:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-10-10 21:57:34,095 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:57:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:34,129 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2024-10-10 21:57:34,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-10 21:57:34,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 96 [2024-10-10 21:57:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:34,130 INFO L225 Difference]: With dead ends: 99 [2024-10-10 21:57:34,132 INFO L226 Difference]: Without dead ends: 64 [2024-10-10 21:57:34,132 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 182 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-10-10 21:57:34,133 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:34,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-10 21:57:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-10 21:57:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:34,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2024-10-10 21:57:34,146 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 96 [2024-10-10 21:57:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:34,146 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2024-10-10 21:57:34,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-10 21:57:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2024-10-10 21:57:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-10-10 21:57:34,148 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:34,148 INFO L215 NwaCegarLoop]: trace histogram [60, 20, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:34,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-10 21:57:34,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-10 21:57:34,349 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:34,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:34,349 INFO L85 PathProgramCache]: Analyzing trace with hash 545365446, now seen corresponding path program 8 times [2024-10-10 21:57:34,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:34,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393066001] [2024-10-10 21:57:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:34,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:34,629 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-10 21:57:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:34,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-10 21:57:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:34,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-10-10 21:57:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2172 trivial. 0 not checked. [2024-10-10 21:57:34,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:34,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393066001] [2024-10-10 21:57:34,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393066001] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:34,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317984768] [2024-10-10 21:57:34,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-10 21:57:34,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:34,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:34,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:34,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-10 21:57:34,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-10 21:57:34,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:34,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-10 21:57:34,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 888 proven. 21 refuted. 0 times theorem prover too weak. 1284 trivial. 0 not checked. [2024-10-10 21:57:34,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2172 trivial. 0 not checked. [2024-10-10 21:57:35,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317984768] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:35,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:35,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-10-10 21:57:35,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98019995] [2024-10-10 21:57:35,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:35,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-10 21:57:35,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-10 21:57:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-10 21:57:35,006 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 21:57:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:35,043 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2024-10-10 21:57:35,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-10 21:57:35,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 111 [2024-10-10 21:57:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:35,045 INFO L225 Difference]: With dead ends: 102 [2024-10-10 21:57:35,045 INFO L226 Difference]: Without dead ends: 72 [2024-10-10 21:57:35,045 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-10-10 21:57:35,046 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:35,046 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:35,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-10 21:57:35,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-10-10 21:57:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2024-10-10 21:57:35,053 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 111 [2024-10-10 21:57:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:35,053 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2024-10-10 21:57:35,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 21:57:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2024-10-10 21:57:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-10-10 21:57:35,055 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:35,055 INFO L215 NwaCegarLoop]: trace histogram [60, 20, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:35,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-10 21:57:35,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:35,256 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:35,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:35,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1988674118, now seen corresponding path program 9 times [2024-10-10 21:57:35,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:35,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749715903] [2024-10-10 21:57:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:35,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:35,699 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-10 21:57:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:35,709 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-10-10 21:57:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:35,720 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-10-10 21:57:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-10 21:57:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2172 trivial. 0 not checked. [2024-10-10 21:57:35,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-10 21:57:35,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749715903] [2024-10-10 21:57:35,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749715903] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-10 21:57:35,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088709269] [2024-10-10 21:57:35,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-10 21:57:35,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:35,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-10 21:57:35,736 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-10 21:57:35,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-10 21:57:36,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-10 21:57:36,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-10 21:57:36,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-10 21:57:36,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-10 21:57:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 888 proven. 105 refuted. 0 times theorem prover too weak. 1284 trivial. 0 not checked. [2024-10-10 21:57:36,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-10 21:57:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2172 trivial. 0 not checked. [2024-10-10 21:57:36,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088709269] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-10 21:57:36,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-10 21:57:36,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2024-10-10 21:57:36,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630436323] [2024-10-10 21:57:36,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-10 21:57:36,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-10 21:57:36,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-10 21:57:36,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-10 21:57:36,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-10-10 21:57:36,941 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 21:57:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-10 21:57:36,984 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2024-10-10 21:57:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-10 21:57:36,985 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 119 [2024-10-10 21:57:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-10 21:57:36,986 INFO L225 Difference]: With dead ends: 107 [2024-10-10 21:57:36,986 INFO L226 Difference]: Without dead ends: 77 [2024-10-10 21:57:36,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 228 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2024-10-10 21:57:36,987 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-10 21:57:36,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-10 21:57:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-10-10 21:57:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-10-10 21:57:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-10 21:57:37,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2024-10-10 21:57:37,005 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 119 [2024-10-10 21:57:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-10 21:57:37,005 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2024-10-10 21:57:37,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-10 21:57:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2024-10-10 21:57:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-10-10 21:57:37,007 INFO L207 NwaCegarLoop]: Found error trace [2024-10-10 21:57:37,007 INFO L215 NwaCegarLoop]: trace histogram [60, 20, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-10 21:57:37,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-10 21:57:37,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-10 21:57:37,208 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-10 21:57:37,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-10 21:57:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1451895121, now seen corresponding path program 10 times [2024-10-10 21:57:37,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-10 21:57:37,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144328098] [2024-10-10 21:57:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-10 21:57:37,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-10 21:57:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat