./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/max-2-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-multidimensional/max-2-u.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-08 22:29:20,652 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-08 22:29:20,731 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-08 22:29:20,736 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-08 22:29:20,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-08 22:29:20,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-08 22:29:20,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-08 22:29:20,766 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-08 22:29:20,767 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-08 22:29:20,767 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-08 22:29:20,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-08 22:29:20,768 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-08 22:29:20,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-08 22:29:20,768 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-08 22:29:20,768 INFO L153 SettingsManager]: * Use SBE=true [2025-01-08 22:29:20,769 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-08 22:29:20,769 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-08 22:29:20,769 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-08 22:29:20,769 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-08 22:29:20,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-08 22:29:20,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-08 22:29:20,769 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-08 22:29:20,769 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-08 22:29:20,770 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-08 22:29:20,770 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-08 22:29:20,770 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-08 22:29:20,770 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-08 22:29:20,770 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-08 22:29:20,770 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-08 22:29:20,770 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:29:20,771 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:29:20,771 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:29:20,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:29:20,771 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-08 22:29:20,771 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:29:20,771 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:29:20,771 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:29:20,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:29:20,772 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-08 22:29:20,772 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-08 22:29:20,772 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-08 22:29:20,772 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-08 22:29:20,772 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-08 22:29:20,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-08 22:29:20,773 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-08 22:29:20,773 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-08 22:29:20,773 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-08 22:29:20,773 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-08 22:29:20,773 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 -> d56d1653edfb1a7b1c72e82d390b1b74d1df9114797a2f1426eb2285f6c4408f [2025-01-08 22:29:21,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-08 22:29:21,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-08 22:29:21,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-08 22:29:21,063 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-08 22:29:21,063 INFO L274 PluginConnector]: CDTParser initialized [2025-01-08 22:29:21,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/max-2-u.c [2025-01-08 22:29:22,376 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fbabc7071/1793e06e246845c9942a9ffedeac9f8e/FLAG216a545ac [2025-01-08 22:29:22,626 INFO L384 CDTParser]: Found 1 translation units. [2025-01-08 22:29:22,632 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-2-u.c [2025-01-08 22:29:22,662 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fbabc7071/1793e06e246845c9942a9ffedeac9f8e/FLAG216a545ac [2025-01-08 22:29:22,939 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fbabc7071/1793e06e246845c9942a9ffedeac9f8e [2025-01-08 22:29:22,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-08 22:29:22,942 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-08 22:29:22,944 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-08 22:29:22,945 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-08 22:29:22,949 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-08 22:29:22,950 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:29:22" (1/1) ... [2025-01-08 22:29:22,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329ee5fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:22, skipping insertion in model container [2025-01-08 22:29:22,951 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:29:22" (1/1) ... [2025-01-08 22:29:22,964 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-08 22:29:23,075 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2025-01-08 22:29:23,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:29:23,094 INFO L200 MainTranslator]: Completed pre-run [2025-01-08 22:29:23,101 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-2-u.c[319,332] [2025-01-08 22:29:23,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:29:23,122 INFO L204 MainTranslator]: Completed translation [2025-01-08 22:29:23,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23 WrapperNode [2025-01-08 22:29:23,123 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-08 22:29:23,124 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-08 22:29:23,124 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-08 22:29:23,124 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-08 22:29:23,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,133 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,143 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2025-01-08 22:29:23,143 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-08 22:29:23,143 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-08 22:29:23,143 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-08 22:29:23,143 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-08 22:29:23,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,151 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,164 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-01-08 22:29:23,165 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,165 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,168 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,169 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,173 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,173 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,174 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,175 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-08 22:29:23,176 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-08 22:29:23,176 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-08 22:29:23,176 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-08 22:29:23,178 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (1/1) ... [2025-01-08 22:29:23,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:29:23,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:29:23,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-08 22:29:23,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-08 22:29:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-08 22:29:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-08 22:29:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-08 22:29:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-08 22:29:23,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-08 22:29:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-08 22:29:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-08 22:29:23,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-08 22:29:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-08 22:29:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-08 22:29:23,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-08 22:29:23,275 INFO L234 CfgBuilder]: Building ICFG [2025-01-08 22:29:23,277 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-08 22:29:23,405 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2025-01-08 22:29:23,405 INFO L283 CfgBuilder]: Performing block encoding [2025-01-08 22:29:23,413 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-08 22:29:23,413 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-08 22:29:23,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:29:23 BoogieIcfgContainer [2025-01-08 22:29:23,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-08 22:29:23,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-08 22:29:23,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-08 22:29:23,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-08 22:29:23,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.01 10:29:22" (1/3) ... [2025-01-08 22:29:23,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca3479c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:29:23, skipping insertion in model container [2025-01-08 22:29:23,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:29:23" (2/3) ... [2025-01-08 22:29:23,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca3479c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:29:23, skipping insertion in model container [2025-01-08 22:29:23,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:29:23" (3/3) ... [2025-01-08 22:29:23,421 INFO L128 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2025-01-08 22:29:23,432 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-08 22:29:23,433 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG max-2-u.c that has 1 procedures, 17 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-01-08 22:29:23,475 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-08 22:29:23,485 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;@2690870e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-08 22:29:23,485 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-08 22:29:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-01-08 22:29:23,492 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:29:23,493 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:29:23,493 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:29:23,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:29:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash 399980284, now seen corresponding path program 1 times [2025-01-08 22:29:23,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:29:23,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977640697] [2025-01-08 22:29:23,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:29:23,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:29:23,562 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-08 22:29:23,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-08 22:29:23,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:29:23,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:29:23,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:29:23,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977640697] [2025-01-08 22:29:23,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977640697] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:29:23,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:29:23,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-08 22:29:23,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259284868] [2025-01-08 22:29:23,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:29:23,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-08 22:29:23,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:29:23,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-08 22:29:23,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-08 22:29:23,757 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:23,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:29:23,816 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2025-01-08 22:29:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-08 22:29:23,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-01-08 22:29:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:29:23,826 INFO L225 Difference]: With dead ends: 32 [2025-01-08 22:29:23,826 INFO L226 Difference]: Without dead ends: 16 [2025-01-08 22:29:23,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-08 22:29:23,832 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:29:23,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:29:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2025-01-08 22:29:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2025-01-08 22:29:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 21 transitions. [2025-01-08 22:29:23,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 21 transitions. Word has length 8 [2025-01-08 22:29:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:29:23,860 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 21 transitions. [2025-01-08 22:29:23,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 21 transitions. [2025-01-08 22:29:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-08 22:29:23,861 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:29:23,862 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:29:23,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-08 22:29:23,862 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:29:23,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:29:23,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1052395902, now seen corresponding path program 1 times [2025-01-08 22:29:23,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:29:23,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673586602] [2025-01-08 22:29:23,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:29:23,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:29:23,875 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-08 22:29:23,884 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-08 22:29:23,886 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:29:23,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-08 22:29:23,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:29:23,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673586602] [2025-01-08 22:29:23,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673586602] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:29:23,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:29:23,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-08 22:29:23,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518018765] [2025-01-08 22:29:23,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:29:23,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-08 22:29:23,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:29:23,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-08 22:29:23,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:29:23,984 INFO L87 Difference]: Start difference. First operand 15 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:24,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:29:24,041 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2025-01-08 22:29:24,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-08 22:29:24,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2025-01-08 22:29:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:29:24,042 INFO L225 Difference]: With dead ends: 36 [2025-01-08 22:29:24,042 INFO L226 Difference]: Without dead ends: 24 [2025-01-08 22:29:24,042 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:29:24,043 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:29:24,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:29:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-01-08 22:29:24,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2025-01-08 22:29:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2025-01-08 22:29:24,050 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 10 [2025-01-08 22:29:24,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:29:24,050 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2025-01-08 22:29:24,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:24,050 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2025-01-08 22:29:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-01-08 22:29:24,052 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:29:24,053 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:29:24,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-08 22:29:24,053 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:29:24,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:29:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash 222034654, now seen corresponding path program 1 times [2025-01-08 22:29:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:29:24,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322030349] [2025-01-08 22:29:24,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:29:24,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:29:24,068 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-08 22:29:24,080 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-08 22:29:24,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:29:24,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:29:24,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:29:24,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322030349] [2025-01-08 22:29:24,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322030349] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:29:24,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:29:24,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-08 22:29:24,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411932531] [2025-01-08 22:29:24,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:29:24,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-08 22:29:24,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:29:24,182 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-08 22:29:24,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:29:24,182 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:29:24,233 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2025-01-08 22:29:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-08 22:29:24,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2025-01-08 22:29:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:29:24,234 INFO L225 Difference]: With dead ends: 39 [2025-01-08 22:29:24,235 INFO L226 Difference]: Without dead ends: 32 [2025-01-08 22:29:24,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-08 22:29:24,236 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:29:24,236 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 16 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:29:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-01-08 22:29:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 19. [2025-01-08 22:29:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2025-01-08 22:29:24,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 11 [2025-01-08 22:29:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:29:24,241 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2025-01-08 22:29:24,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2025-01-08 22:29:24,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2025-01-08 22:29:24,242 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:29:24,242 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:29:24,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-08 22:29:24,242 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:29:24,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:29:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1718451897, now seen corresponding path program 1 times [2025-01-08 22:29:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:29:24,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734343492] [2025-01-08 22:29:24,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:29:24,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:29:24,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-08 22:29:24,275 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-08 22:29:24,275 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:29:24,275 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:29:24,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:29:24,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734343492] [2025-01-08 22:29:24,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734343492] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:29:24,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453905205] [2025-01-08 22:29:24,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:29:24,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:29:24,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:29:24,376 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:29:24,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-08 22:29:24,415 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-08 22:29:24,439 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-08 22:29:24,439 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:29:24,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:24,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-08 22:29:24,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:29:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:29:24,506 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:29:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-08 22:29:24,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453905205] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:29:24,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:29:24,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-01-08 22:29:24,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147217737] [2025-01-08 22:29:24,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:29:24,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-08 22:29:24,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:29:24,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-08 22:29:24,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2025-01-08 22:29:24,547 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:29:24,674 INFO L93 Difference]: Finished difference Result 62 states and 86 transitions. [2025-01-08 22:29:24,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-08 22:29:24,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2025-01-08 22:29:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:29:24,676 INFO L225 Difference]: With dead ends: 62 [2025-01-08 22:29:24,676 INFO L226 Difference]: Without dead ends: 46 [2025-01-08 22:29:24,676 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2025-01-08 22:29:24,677 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 154 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:29:24,677 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 25 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:29:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-01-08 22:29:24,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2025-01-08 22:29:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:24,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2025-01-08 22:29:24,690 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 16 [2025-01-08 22:29:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:29:24,690 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2025-01-08 22:29:24,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:24,691 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2025-01-08 22:29:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-01-08 22:29:24,691 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:29:24,692 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:29:24,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-08 22:29:24,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:29:24,896 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:29:24,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:29:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1630564203, now seen corresponding path program 2 times [2025-01-08 22:29:24,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:29:24,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70859300] [2025-01-08 22:29:24,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:29:24,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:29:24,911 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-01-08 22:29:24,926 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-01-08 22:29:24,926 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:29:24,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-01-08 22:29:25,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:29:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70859300] [2025-01-08 22:29:25,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70859300] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:29:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098393966] [2025-01-08 22:29:25,032 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:29:25,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:29:25,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:29:25,035 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:29:25,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-08 22:29:25,083 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 28 statements into 2 equivalence classes. [2025-01-08 22:29:25,112 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 28 of 28 statements. [2025-01-08 22:29:25,113 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:29:25,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:25,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-08 22:29:25,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:29:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-01-08 22:29:25,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:29:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-01-08 22:29:25,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098393966] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:29:25,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:29:25,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 16 [2025-01-08 22:29:25,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73527528] [2025-01-08 22:29:25,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:29:25,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-08 22:29:25,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:29:25,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-08 22:29:25,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2025-01-08 22:29:25,312 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:29:25,958 INFO L93 Difference]: Finished difference Result 160 states and 220 transitions. [2025-01-08 22:29:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-01-08 22:29:25,958 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2025-01-08 22:29:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:29:25,959 INFO L225 Difference]: With dead ends: 160 [2025-01-08 22:29:25,960 INFO L226 Difference]: Without dead ends: 123 [2025-01-08 22:29:25,961 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=643, Invalid=1163, Unknown=0, NotChecked=0, Total=1806 [2025-01-08 22:29:25,961 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 381 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:29:25,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 57 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:29:25,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2025-01-08 22:29:25,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2025-01-08 22:29:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2795698924731183) internal successors, (119), 93 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2025-01-08 22:29:25,983 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 28 [2025-01-08 22:29:25,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:29:25,983 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2025-01-08 22:29:25,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:25,983 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2025-01-08 22:29:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-01-08 22:29:25,984 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:29:25,984 INFO L218 NwaCegarLoop]: trace histogram [20, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:29:25,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-08 22:29:26,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:29:26,186 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:29:26,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:29:26,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1017570533, now seen corresponding path program 3 times [2025-01-08 22:29:26,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:29:26,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394414483] [2025-01-08 22:29:26,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:29:26,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:29:26,218 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 64 statements into 13 equivalence classes. [2025-01-08 22:29:26,224 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 64 statements. [2025-01-08 22:29:26,224 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-08 22:29:26,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2025-01-08 22:29:26,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:29:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394414483] [2025-01-08 22:29:26,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394414483] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:29:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934081289] [2025-01-08 22:29:26,274 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:29:26,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:29:26,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:29:26,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:29:26,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-08 22:29:26,342 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 64 statements into 13 equivalence classes. [2025-01-08 22:29:26,355 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 12 of 64 statements. [2025-01-08 22:29:26,355 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-01-08 22:29:26,355 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:26,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-08 22:29:26,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:29:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2025-01-08 22:29:26,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:29:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2025-01-08 22:29:26,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934081289] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:29:26,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:29:26,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2025-01-08 22:29:26,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734597862] [2025-01-08 22:29:26,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:29:26,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-08 22:29:26,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:29:26,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-08 22:29:26,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2025-01-08 22:29:26,656 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:26,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:29:26,788 INFO L93 Difference]: Finished difference Result 362 states and 468 transitions. [2025-01-08 22:29:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-01-08 22:29:26,788 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2025-01-08 22:29:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:29:26,792 INFO L225 Difference]: With dead ends: 362 [2025-01-08 22:29:26,794 INFO L226 Difference]: Without dead ends: 328 [2025-01-08 22:29:26,795 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2025-01-08 22:29:26,796 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 138 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:29:26,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 36 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:29:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2025-01-08 22:29:26,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 190. [2025-01-08 22:29:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.312169312169312) internal successors, (248), 189 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 248 transitions. [2025-01-08 22:29:26,837 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 248 transitions. Word has length 64 [2025-01-08 22:29:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:29:26,838 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 248 transitions. [2025-01-08 22:29:26,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 248 transitions. [2025-01-08 22:29:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2025-01-08 22:29:26,843 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:29:26,843 INFO L218 NwaCegarLoop]: trace histogram [40, 40, 40, 20, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:29:26,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-08 22:29:27,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:29:27,048 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:29:27,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:29:27,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1746422700, now seen corresponding path program 4 times [2025-01-08 22:29:27,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:29:27,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689762113] [2025-01-08 22:29:27,049 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:29:27,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:29:27,085 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 160 statements into 2 equivalence classes. [2025-01-08 22:29:27,173 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 138 of 160 statements. [2025-01-08 22:29:27,173 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:29:27,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 117 proven. 1964 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2025-01-08 22:29:27,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:29:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689762113] [2025-01-08 22:29:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689762113] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:29:27,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571872434] [2025-01-08 22:29:27,765 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:29:27,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:29:27,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:29:27,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:29:27,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-08 22:29:27,845 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 160 statements into 2 equivalence classes. [2025-01-08 22:29:27,897 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 138 of 160 statements. [2025-01-08 22:29:27,897 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-08 22:29:27,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:27,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-08 22:29:27,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:29:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 117 proven. 1964 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2025-01-08 22:29:28,652 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:29:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2750 backedges. 117 proven. 1964 refuted. 0 times theorem prover too weak. 669 trivial. 0 not checked. [2025-01-08 22:29:29,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571872434] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:29:29,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:29:29,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2025-01-08 22:29:29,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539131286] [2025-01-08 22:29:29,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:29:29,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2025-01-08 22:29:29,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:29:29,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2025-01-08 22:29:29,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1430, Unknown=0, NotChecked=0, Total=1892 [2025-01-08 22:29:29,072 INFO L87 Difference]: Start difference. First operand 190 states and 248 transitions. Second operand has 44 states, 44 states have (on average 3.25) internal successors, (143), 44 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:29:35,945 INFO L93 Difference]: Finished difference Result 2542 states and 3111 transitions. [2025-01-08 22:29:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2025-01-08 22:29:35,945 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.25) internal successors, (143), 44 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2025-01-08 22:29:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:29:35,954 INFO L225 Difference]: With dead ends: 2542 [2025-01-08 22:29:35,955 INFO L226 Difference]: Without dead ends: 2508 [2025-01-08 22:29:35,976 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 500 SyntacticMatches, 5 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35653 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=19032, Invalid=55224, Unknown=0, NotChecked=0, Total=74256 [2025-01-08 22:29:35,977 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 897 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 2422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-01-08 22:29:35,977 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [897 Valid, 1113 Invalid, 2422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-01-08 22:29:35,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2025-01-08 22:29:36,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 937. [2025-01-08 22:29:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 1.3632478632478633) internal successors, (1276), 936 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1276 transitions. [2025-01-08 22:29:36,054 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1276 transitions. Word has length 160 [2025-01-08 22:29:36,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:29:36,055 INFO L471 AbstractCegarLoop]: Abstraction has 937 states and 1276 transitions. [2025-01-08 22:29:36,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.25) internal successors, (143), 44 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:29:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1276 transitions. [2025-01-08 22:29:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2025-01-08 22:29:36,061 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:29:36,061 INFO L218 NwaCegarLoop]: trace histogram [100, 100, 100, 20, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:29:36,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-08 22:29:36,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-01-08 22:29:36,262 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:29:36,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:29:36,262 INFO L85 PathProgramCache]: Analyzing trace with hash 615555782, now seen corresponding path program 5 times [2025-01-08 22:29:36,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:29:36,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101956259] [2025-01-08 22:29:36,263 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:29:36,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:29:36,297 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 352 statements into 108 equivalence classes. [2025-01-08 22:29:38,117 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) and asserted 352 of 352 statements. [2025-01-08 22:29:38,118 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2025-01-08 22:29:38,118 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:29:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16184 backedges. 7732 proven. 1108 refuted. 0 times theorem prover too weak. 7344 trivial. 0 not checked. [2025-01-08 22:29:38,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:29:38,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101956259] [2025-01-08 22:29:38,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101956259] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:29:38,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518421824] [2025-01-08 22:29:38,884 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:29:38,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:29:38,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:29:38,887 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:29:38,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-08 22:29:38,993 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 352 statements into 108 equivalence classes. [2025-01-08 22:30:57,892 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) and asserted 352 of 352 statements. [2025-01-08 22:30:57,892 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2025-01-08 22:30:57,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:30:57,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-08 22:30:57,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:30:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16184 backedges. 8695 proven. 145 refuted. 0 times theorem prover too weak. 7344 trivial. 0 not checked. [2025-01-08 22:30:58,241 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:30:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16184 backedges. 7732 proven. 1108 refuted. 0 times theorem prover too weak. 7344 trivial. 0 not checked. [2025-01-08 22:30:58,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518421824] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:30:58,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:30:58,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2025-01-08 22:30:58,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401503829] [2025-01-08 22:30:58,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:30:58,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-01-08 22:30:58,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:30:58,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-01-08 22:30:58,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2025-01-08 22:30:58,543 INFO L87 Difference]: Start difference. First operand 937 states and 1276 transitions. Second operand has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:30:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:30:59,032 INFO L93 Difference]: Finished difference Result 2107 states and 3011 transitions. [2025-01-08 22:30:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-08 22:30:59,033 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 352 [2025-01-08 22:30:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:30:59,038 INFO L225 Difference]: With dead ends: 2107 [2025-01-08 22:30:59,038 INFO L226 Difference]: Without dead ends: 1184 [2025-01-08 22:30:59,040 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2025-01-08 22:30:59,041 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 626 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-08 22:30:59,041 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 119 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-08 22:30:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2025-01-08 22:30:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1142. [2025-01-08 22:30:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 1.3260297984224365) internal successors, (1513), 1141 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:30:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1513 transitions. [2025-01-08 22:30:59,150 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1513 transitions. Word has length 352 [2025-01-08 22:30:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:30:59,151 INFO L471 AbstractCegarLoop]: Abstraction has 1142 states and 1513 transitions. [2025-01-08 22:30:59,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4324324324324325) internal successors, (127), 37 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:30:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1513 transitions. [2025-01-08 22:30:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2025-01-08 22:30:59,176 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:30:59,176 INFO L218 NwaCegarLoop]: trace histogram [330, 330, 330, 44, 15, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:30:59,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-08 22:30:59,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:30:59,378 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:30:59,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:30:59,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2078690469, now seen corresponding path program 6 times [2025-01-08 22:30:59,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:30:59,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471866288] [2025-01-08 22:30:59,380 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:30:59,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:30:59,469 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1076 statements into 341 equivalence classes. [2025-01-08 22:31:00,209 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) and asserted 198 of 1076 statements. [2025-01-08 22:31:00,209 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2025-01-08 22:31:00,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:31:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 169068 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 168536 trivial. 0 not checked. [2025-01-08 22:31:00,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:31:00,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471866288] [2025-01-08 22:31:00,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471866288] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:31:00,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398308700] [2025-01-08 22:31:00,470 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-08 22:31:00,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:31:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:31:00,472 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-08 22:31:00,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process