./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_init2_ground-2.i --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-examples/standard_init2_ground-2.i -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 18f709bee75406c3f211c93c909141f7168d3f312ff9a7046aa99aa41dbcf33f --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-08 22:05:33,823 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-08 22:05:33,877 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-08 22:05:33,884 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-08 22:05:33,884 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-08 22:05:33,897 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-08 22:05:33,897 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-08 22:05:33,897 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-08 22:05:33,897 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-08 22:05:33,897 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-08 22:05:33,897 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-08 22:05:33,897 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-08 22:05:33,898 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * Use SBE=true [2025-01-08 22:05:33,898 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-08 22:05:33,898 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-08 22:05:33,899 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:05:33,899 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:05:33,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-08 22:05:33,899 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-08 22:05:33,900 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-08 22:05:33,900 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-08 22:05:33,900 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-08 22:05:33,900 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 -> 18f709bee75406c3f211c93c909141f7168d3f312ff9a7046aa99aa41dbcf33f [2025-01-08 22:05:34,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-08 22:05:34,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-08 22:05:34,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-08 22:05:34,126 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-08 22:05:34,126 INFO L274 PluginConnector]: CDTParser initialized [2025-01-08 22:05:34,127 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init2_ground-2.i [2025-01-08 22:05:35,259 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f9e840b93/2a232bc428c64b22956d49cbca59cad1/FLAGc6918961e [2025-01-08 22:05:35,520 INFO L384 CDTParser]: Found 1 translation units. [2025-01-08 22:05:35,521 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init2_ground-2.i [2025-01-08 22:05:35,525 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f9e840b93/2a232bc428c64b22956d49cbca59cad1/FLAGc6918961e [2025-01-08 22:05:35,534 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/f9e840b93/2a232bc428c64b22956d49cbca59cad1 [2025-01-08 22:05:35,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-08 22:05:35,537 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-08 22:05:35,537 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-08 22:05:35,538 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-08 22:05:35,540 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-08 22:05:35,541 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,541 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a17d29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35, skipping insertion in model container [2025-01-08 22:05:35,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,550 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-08 22:05:35,661 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-examples/standard_init2_ground-2.i[816,829] [2025-01-08 22:05:35,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:05:35,681 INFO L200 MainTranslator]: Completed pre-run [2025-01-08 22:05:35,689 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-examples/standard_init2_ground-2.i[816,829] [2025-01-08 22:05:35,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-08 22:05:35,702 INFO L204 MainTranslator]: Completed translation [2025-01-08 22:05:35,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35 WrapperNode [2025-01-08 22:05:35,703 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-08 22:05:35,704 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-08 22:05:35,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-08 22:05:35,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-08 22:05:35,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,712 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,720 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 37 [2025-01-08 22:05:35,721 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-08 22:05:35,721 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-08 22:05:35,721 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-08 22:05:35,721 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-08 22:05:35,726 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,726 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,727 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,733 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-01-08 22:05:35,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,736 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,736 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,738 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,738 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,739 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-08 22:05:35,740 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-08 22:05:35,740 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-08 22:05:35,740 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-08 22:05:35,741 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (1/1) ... [2025-01-08 22:05:35,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-08 22:05:35,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:05:35,767 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 22:05:35,770 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 22:05:35,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-08 22:05:35,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-08 22:05:35,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-08 22:05:35,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-08 22:05:35,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-08 22:05:35,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-08 22:05:35,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-08 22:05:35,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-08 22:05:35,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-08 22:05:35,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-08 22:05:35,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-08 22:05:35,826 INFO L234 CfgBuilder]: Building ICFG [2025-01-08 22:05:35,833 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-08 22:05:35,922 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2025-01-08 22:05:35,922 INFO L283 CfgBuilder]: Performing block encoding [2025-01-08 22:05:35,928 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-08 22:05:35,929 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-08 22:05:35,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:05:35 BoogieIcfgContainer [2025-01-08 22:05:35,929 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-08 22:05:35,930 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-08 22:05:35,931 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-08 22:05:35,934 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-08 22:05:35,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.01 10:05:35" (1/3) ... [2025-01-08 22:05:35,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3caf25ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:05:35, skipping insertion in model container [2025-01-08 22:05:35,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.01 10:05:35" (2/3) ... [2025-01-08 22:05:35,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3caf25ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.01 10:05:35, skipping insertion in model container [2025-01-08 22:05:35,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.01 10:05:35" (3/3) ... [2025-01-08 22:05:35,939 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-2.i [2025-01-08 22:05:35,954 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-08 22:05:35,955 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_init2_ground-2.i that has 1 procedures, 12 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-08 22:05:35,987 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-08 22:05:35,994 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;@722884dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-08 22:05:35,996 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-08 22:05:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 22:05:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-01-08 22:05:36,001 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:05:36,001 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:05:36,001 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:05:36,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:05:36,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1807891851, now seen corresponding path program 1 times [2025-01-08 22:05:36,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:05:36,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362112994] [2025-01-08 22:05:36,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:05:36,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:05:36,053 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-08 22:05:36,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-08 22:05:36,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:05:36,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:05:36,149 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 22:05:36,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:05:36,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362112994] [2025-01-08 22:05:36,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362112994] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-08 22:05:36,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-08 22:05:36,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-08 22:05:36,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357042828] [2025-01-08 22:05:36,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-08 22:05:36,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-08 22:05:36,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:05:36,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-08 22:05:36,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-08 22:05:36,169 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 22:05:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:05:36,196 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2025-01-08 22:05:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-08 22:05:36,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2025-01-08 22:05:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:05:36,203 INFO L225 Difference]: With dead ends: 23 [2025-01-08 22:05:36,205 INFO L226 Difference]: Without dead ends: 11 [2025-01-08 22:05:36,207 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 22:05:36,209 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:05:36,211 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:05:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2025-01-08 22:05:36,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2025-01-08 22:05:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:05:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2025-01-08 22:05:36,232 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2025-01-08 22:05:36,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:05:36,232 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2025-01-08 22:05:36,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 22:05:36,232 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2025-01-08 22:05:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-01-08 22:05:36,232 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:05:36,232 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:05:36,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-08 22:05:36,234 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:05:36,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:05:36,234 INFO L85 PathProgramCache]: Analyzing trace with hash 264745165, now seen corresponding path program 1 times [2025-01-08 22:05:36,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:05:36,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748409674] [2025-01-08 22:05:36,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:05:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:05:36,243 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-08 22:05:36,255 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-08 22:05:36,255 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:05:36,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:05:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:05:36,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:05:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748409674] [2025-01-08 22:05:36,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748409674] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:05:36,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399643115] [2025-01-08 22:05:36,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-08 22:05:36,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:05:36,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:05:36,325 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 22:05:36,327 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 22:05:36,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-08 22:05:36,367 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-08 22:05:36,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-08 22:05:36,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:05:36,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-08 22:05:36,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:05:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:05:36,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:05:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-01-08 22:05:36,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399643115] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:05:36,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:05:36,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-08 22:05:36,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494132666] [2025-01-08 22:05:36,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:05:36,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-08 22:05:36,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:05:36,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-08 22:05:36,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-01-08 22:05:36,440 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 22:05:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:05:36,490 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2025-01-08 22:05:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-08 22:05:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-01-08 22:05:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:05:36,491 INFO L225 Difference]: With dead ends: 24 [2025-01-08 22:05:36,491 INFO L226 Difference]: Without dead ends: 17 [2025-01-08 22:05:36,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-01-08 22:05:36,492 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:05:36,493 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:05:36,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2025-01-08 22:05:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2025-01-08 22:05:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:05:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2025-01-08 22:05:36,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 9 [2025-01-08 22:05:36,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:05:36,498 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2025-01-08 22:05:36,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 22:05:36,498 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2025-01-08 22:05:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-01-08 22:05:36,499 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:05:36,499 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:05:36,515 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 22:05:36,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:05:36,700 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:05:36,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:05:36,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1304130037, now seen corresponding path program 2 times [2025-01-08 22:05:36,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:05:36,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132908467] [2025-01-08 22:05:36,701 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:05:36,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:05:36,720 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-01-08 22:05:36,742 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-01-08 22:05:36,742 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:05:36,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:05:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:05:36,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:05:36,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132908467] [2025-01-08 22:05:36,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132908467] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:05:36,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018484619] [2025-01-08 22:05:36,821 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-08 22:05:36,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:05:36,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:05:36,823 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 22:05:36,828 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 22:05:36,872 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-01-08 22:05:36,891 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-01-08 22:05:36,891 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-08 22:05:36,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:05:36,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-08 22:05:36,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:05:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:05:36,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:05:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-01-08 22:05:36,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018484619] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:05:36,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:05:36,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-01-08 22:05:36,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830619481] [2025-01-08 22:05:36,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:05:36,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-08 22:05:36,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:05:36,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-08 22:05:36,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-01-08 22:05:36,954 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:05:36,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:05:36,993 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2025-01-08 22:05:36,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-08 22:05:36,994 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2025-01-08 22:05:36,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:05:36,996 INFO L225 Difference]: With dead ends: 39 [2025-01-08 22:05:36,996 INFO L226 Difference]: Without dead ends: 29 [2025-01-08 22:05:36,997 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-01-08 22:05:36,998 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-08 22:05:36,998 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-08 22:05:36,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-01-08 22:05:37,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2025-01-08 22:05:37,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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 22:05:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2025-01-08 22:05:37,006 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 15 [2025-01-08 22:05:37,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:05:37,006 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2025-01-08 22:05:37,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-08 22:05:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2025-01-08 22:05:37,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-01-08 22:05:37,007 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:05:37,008 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:05:37,016 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 22:05:37,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:05:37,212 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:05:37,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:05:37,214 INFO L85 PathProgramCache]: Analyzing trace with hash -305787189, now seen corresponding path program 3 times [2025-01-08 22:05:37,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:05:37,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755877878] [2025-01-08 22:05:37,214 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:05:37,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:05:37,231 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 6 equivalence classes. [2025-01-08 22:05:37,295 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 27 of 27 statements. [2025-01-08 22:05:37,295 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-08 22:05:37,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:05:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-01-08 22:05:37,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:05:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755877878] [2025-01-08 22:05:37,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755877878] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:05:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891370107] [2025-01-08 22:05:37,546 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-08 22:05:37,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:05:37,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:05:37,550 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 22:05:37,551 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 22:05:37,598 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 6 equivalence classes. [2025-01-08 22:05:37,689 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 27 of 27 statements. [2025-01-08 22:05:37,689 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-08 22:05:37,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:05:37,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-08 22:05:37,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:05:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-01-08 22:05:37,727 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:05:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-01-08 22:05:37,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891370107] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:05:37,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:05:37,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-01-08 22:05:37,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370735481] [2025-01-08 22:05:37,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:05:37,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-01-08 22:05:37,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:05:37,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-01-08 22:05:37,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-01-08 22:05:37,919 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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 22:05:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:05:37,993 INFO L93 Difference]: Finished difference Result 69 states and 96 transitions. [2025-01-08 22:05:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-01-08 22:05:37,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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 27 [2025-01-08 22:05:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:05:37,994 INFO L225 Difference]: With dead ends: 69 [2025-01-08 22:05:37,994 INFO L226 Difference]: Without dead ends: 53 [2025-01-08 22:05:37,994 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-01-08 22:05:37,995 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:05:37,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:05:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-01-08 22:05:37,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2025-01-08 22:05:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 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 22:05:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2025-01-08 22:05:37,999 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 27 [2025-01-08 22:05:38,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:05:38,000 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2025-01-08 22:05:38,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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 22:05:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2025-01-08 22:05:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-01-08 22:05:38,000 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:05:38,000 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:05:38,008 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 22:05:38,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:05:38,201 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:05:38,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:05:38,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1496604747, now seen corresponding path program 4 times [2025-01-08 22:05:38,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:05:38,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286654545] [2025-01-08 22:05:38,202 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:05:38,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:05:38,218 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-01-08 22:05:38,232 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-01-08 22:05:38,232 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:05:38,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:05:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-01-08 22:05:38,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:05:38,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286654545] [2025-01-08 22:05:38,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286654545] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:05:38,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834630780] [2025-01-08 22:05:38,699 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-08 22:05:38,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:05:38,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:05:38,705 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 22:05:38,707 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 22:05:38,755 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-01-08 22:05:38,787 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-01-08 22:05:38,787 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-01-08 22:05:38,787 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:05:38,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-01-08 22:05:38,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-08 22:05:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-01-08 22:05:38,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-08 22:05:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-01-08 22:05:39,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834630780] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-08 22:05:39,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-08 22:05:39,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-01-08 22:05:39,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852751562] [2025-01-08 22:05:39,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-08 22:05:39,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-01-08 22:05:39,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-08 22:05:39,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-01-08 22:05:39,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-01-08 22:05:39,413 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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 22:05:39,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-08 22:05:39,586 INFO L93 Difference]: Finished difference Result 129 states and 180 transitions. [2025-01-08 22:05:39,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-01-08 22:05:39,586 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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 51 [2025-01-08 22:05:39,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-08 22:05:39,587 INFO L225 Difference]: With dead ends: 129 [2025-01-08 22:05:39,587 INFO L226 Difference]: Without dead ends: 101 [2025-01-08 22:05:39,588 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2025-01-08 22:05:39,588 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-08 22:05:39,588 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-08 22:05:39,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-01-08 22:05:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2025-01-08 22:05:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 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 22:05:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2025-01-08 22:05:39,596 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 51 [2025-01-08 22:05:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-08 22:05:39,596 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2025-01-08 22:05:39,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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 22:05:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2025-01-08 22:05:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-01-08 22:05:39,598 INFO L210 NwaCegarLoop]: Found error trace [2025-01-08 22:05:39,598 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1] [2025-01-08 22:05:39,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-08 22:05:39,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:05:39,802 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-08 22:05:39,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-08 22:05:39,803 INFO L85 PathProgramCache]: Analyzing trace with hash 915293003, now seen corresponding path program 5 times [2025-01-08 22:05:39,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-08 22:05:39,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773395091] [2025-01-08 22:05:39,803 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:05:39,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-08 22:05:39,830 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 99 statements into 24 equivalence classes. [2025-01-08 22:05:39,910 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 99 of 99 statements. [2025-01-08 22:05:39,910 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-01-08 22:05:39,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-08 22:05:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2025-01-08 22:05:41,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-08 22:05:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773395091] [2025-01-08 22:05:41,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773395091] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-08 22:05:41,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583780286] [2025-01-08 22:05:41,406 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-08 22:05:41,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-08 22:05:41,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-08 22:05:41,408 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 22:05:41,411 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 22:05:41,475 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 99 statements into 24 equivalence classes.