./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_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/loop-crafted/simple_array_index_value_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 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 02:56:46,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 02:56:46,896 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 02:56:46,899 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 02:56:46,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 02:56:46,915 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 02:56:46,916 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 02:56:46,916 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 02:56:46,916 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 02:56:46,916 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 02:56:46,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 02:56:46,916 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 02:56:46,917 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 02:56:46,917 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 02:56:46,917 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 02:56:46,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 02:56:46,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 02:56:46,917 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 02:56:46,917 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 02:56:46,917 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 02:56:46,917 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 02:56:46,918 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 02:56:46,918 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 02:56:46,918 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 02:56:46,918 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 02:56:46,918 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 02:56:46,918 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 02:56:46,918 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 02:56:46,918 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 02:56:46,918 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 02:56:46,918 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 02:56:46,918 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 02:56:46,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:56:46,919 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 02:56:46,919 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 02:56:46,919 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 02:56:46,919 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 02:56:46,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:56:46,919 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 02:56:46,919 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 02:56:46,919 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 02:56:46,919 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 02:56:46,919 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 02:56:46,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 02:56:46,920 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 02:56:46,920 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 02:56:46,920 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 02:56:46,920 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 02:56:46,920 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 -> 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 [2025-01-09 02:56:47,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 02:56:47,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 02:56:47,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 02:56:47,145 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 02:56:47,145 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 02:56:47,146 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2025-01-09 02:56:48,277 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/badb81a96/22a9fede0d2446ecb31700f15433d4f1/FLAG361cf4f50 [2025-01-09 02:56:48,549 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 02:56:48,550 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2025-01-09 02:56:48,556 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/badb81a96/22a9fede0d2446ecb31700f15433d4f1/FLAG361cf4f50 [2025-01-09 02:56:48,856 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/badb81a96/22a9fede0d2446ecb31700f15433d4f1 [2025-01-09 02:56:48,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 02:56:48,858 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 02:56:48,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 02:56:48,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 02:56:48,862 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 02:56:48,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:48,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1533b4b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48, skipping insertion in model container [2025-01-09 02:56:48,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:48,872 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 02:56:48,957 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/loop-crafted/simple_array_index_value_2.i[919,932] [2025-01-09 02:56:48,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 02:56:48,972 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 02:56:48,981 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/loop-crafted/simple_array_index_value_2.i[919,932] [2025-01-09 02:56:48,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 02:56:48,992 INFO L204 MainTranslator]: Completed translation [2025-01-09 02:56:48,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48 WrapperNode [2025-01-09 02:56:48,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 02:56:48,993 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 02:56:48,994 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 02:56:48,994 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 02:56:48,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,002 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,010 INFO L138 Inliner]: procedures = 17, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 40 [2025-01-09 02:56:49,011 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 02:56:49,011 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 02:56:49,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 02:56:49,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 02:56:49,016 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,017 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,023 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 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]. [2025-01-09 02:56:49,024 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,024 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,026 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,027 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,028 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,029 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,030 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 02:56:49,031 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 02:56:49,031 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 02:56:49,031 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 02:56:49,031 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (1/1) ... [2025-01-09 02:56:49,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 02:56:49,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:49,063 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) [2025-01-09 02:56:49,065 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 [2025-01-09 02:56:49,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 02:56:49,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 02:56:49,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-01-09 02:56:49,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-01-09 02:56:49,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-01-09 02:56:49,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-01-09 02:56:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 02:56:49,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 02:56:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-01-09 02:56:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-01-09 02:56:49,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-01-09 02:56:49,147 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 02:56:49,149 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 02:56:49,249 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-01-09 02:56:49,250 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 02:56:49,258 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 02:56:49,259 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 02:56:49,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 02:56:49 BoogieIcfgContainer [2025-01-09 02:56:49,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 02:56:49,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 02:56:49,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 02:56:49,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 02:56:49,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 02:56:48" (1/3) ... [2025-01-09 02:56:49,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737b9bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 02:56:49, skipping insertion in model container [2025-01-09 02:56:49,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 02:56:48" (2/3) ... [2025-01-09 02:56:49,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737b9bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 02:56:49, skipping insertion in model container [2025-01-09 02:56:49,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 02:56:49" (3/3) ... [2025-01-09 02:56:49,266 INFO L128 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2025-01-09 02:56:49,275 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 02:56:49,277 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG simple_array_index_value_2.i that has 1 procedures, 13 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-01-09 02:56:49,317 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 02:56:49,324 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;@2d7b85cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 02:56:49,325 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 02:56:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-01-09 02:56:49,330 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:49,330 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-09 02:56:49,331 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:49,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:49,334 INFO L85 PathProgramCache]: Analyzing trace with hash 889816553, now seen corresponding path program 1 times [2025-01-09 02:56:49,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:49,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752611491] [2025-01-09 02:56:49,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:56:49,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:49,382 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-09 02:56:49,399 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-09 02:56:49,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:56:49,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:49,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:49,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752611491] [2025-01-09 02:56:49,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752611491] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 02:56:49,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 02:56:49,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-09 02:56:49,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718306469] [2025-01-09 02:56:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 02:56:49,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-09 02:56:49,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:49,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-09 02:56:49,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-09 02:56:49,483 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2025-01-09 02:56:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:56:49,508 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2025-01-09 02:56:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-09 02:56:49,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2025-01-09 02:56:49,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:56:49,513 INFO L225 Difference]: With dead ends: 32 [2025-01-09 02:56:49,513 INFO L226 Difference]: Without dead ends: 18 [2025-01-09 02:56:49,515 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 [2025-01-09 02:56:49,517 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 02:56:49,518 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 16 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 02:56:49,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2025-01-09 02:56:49,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 11. [2025-01-09 02:56:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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) [2025-01-09 02:56:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2025-01-09 02:56:49,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2025-01-09 02:56:49,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:56:49,539 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2025-01-09 02:56:49,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2025-01-09 02:56:49,539 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2025-01-09 02:56:49,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-01-09 02:56:49,540 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:49,540 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:56:49,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-09 02:56:49,541 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:49,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:49,542 INFO L85 PathProgramCache]: Analyzing trace with hash 351586923, now seen corresponding path program 1 times [2025-01-09 02:56:49,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:49,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000235618] [2025-01-09 02:56:49,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:56:49,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:49,557 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-09 02:56:49,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-09 02:56:49,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:56:49,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:49,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:49,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000235618] [2025-01-09 02:56:49,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000235618] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:56:49,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864631525] [2025-01-09 02:56:49,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:56:49,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:49,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:49,675 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) [2025-01-09 02:56:49,677 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 [2025-01-09 02:56:49,706 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-09 02:56:49,718 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-09 02:56:49,718 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:56:49,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:49,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-09 02:56:49,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:56:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:49,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:56:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:49,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864631525] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:56:49,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:56:49,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-09 02:56:49,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694457407] [2025-01-09 02:56:49,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:56:49,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 02:56:49,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:49,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 02:56:49,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2025-01-09 02:56:49,769 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:56:49,820 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2025-01-09 02:56:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 02:56:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-01-09 02:56:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:56:49,821 INFO L225 Difference]: With dead ends: 41 [2025-01-09 02:56:49,821 INFO L226 Difference]: Without dead ends: 36 [2025-01-09 02:56:49,821 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2025-01-09 02:56:49,822 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 02:56:49,822 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 02:56:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2025-01-09 02:56:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 20. [2025-01-09 02:56:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2025-01-09 02:56:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2025-01-09 02:56:49,825 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 9 [2025-01-09 02:56:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:56:49,825 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2025-01-09 02:56:49,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-09 02:56:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2025-01-09 02:56:49,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-01-09 02:56:49,826 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:49,826 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2025-01-09 02:56:49,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 02:56:50,026 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 [2025-01-09 02:56:50,028 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:50,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:50,029 INFO L85 PathProgramCache]: Analyzing trace with hash 946677609, now seen corresponding path program 2 times [2025-01-09 02:56:50,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:50,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088591762] [2025-01-09 02:56:50,029 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:56:50,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:50,048 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 02:56:50,064 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 02:56:50,064 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:56:50,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-09 02:56:50,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088591762] [2025-01-09 02:56:50,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088591762] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:56:50,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809864354] [2025-01-09 02:56:50,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:56:50,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:50,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:50,264 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) [2025-01-09 02:56:50,271 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 [2025-01-09 02:56:50,303 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-01-09 02:56:50,319 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 02:56:50,319 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:56:50,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:50,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-01-09 02:56:50,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:56:50,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-01-09 02:56:50,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2025-01-09 02:56:50,636 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2025-01-09 02:56:50,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2025-01-09 02:56:50,843 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2025-01-09 02:56:50,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2025-01-09 02:56:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-01-09 02:56:50,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:56:51,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2025-01-09 02:56:51,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 02:56:51,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2025-01-09 02:56:51,451 INFO L349 Elim1Store]: treesize reduction 20, result has 54.5 percent of original size [2025-01-09 02:56:51,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 51 [2025-01-09 02:56:51,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 02:56:51,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 46 [2025-01-09 02:56:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-01-09 02:56:51,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809864354] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:56:51,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:56:51,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 12] total 24 [2025-01-09 02:56:51,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072672518] [2025-01-09 02:56:51,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:56:51,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 02:56:51,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:51,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 02:56:51,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2025-01-09 02:56:51,626 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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) [2025-01-09 02:56:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:56:52,472 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2025-01-09 02:56:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-01-09 02:56:52,472 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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 18 [2025-01-09 02:56:52,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:56:52,473 INFO L225 Difference]: With dead ends: 58 [2025-01-09 02:56:52,473 INFO L226 Difference]: Without dead ends: 53 [2025-01-09 02:56:52,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2025-01-09 02:56:52,476 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 02:56:52,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 109 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 02:56:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-01-09 02:56:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 25. [2025-01-09 02:56:52,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 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) [2025-01-09 02:56:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2025-01-09 02:56:52,485 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2025-01-09 02:56:52,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:56:52,485 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2025-01-09 02:56:52,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 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) [2025-01-09 02:56:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2025-01-09 02:56:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-01-09 02:56:52,486 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:52,486 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 02:56:52,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-09 02:56:52,691 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 [2025-01-09 02:56:52,691 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:52,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:52,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1638034167, now seen corresponding path program 1 times [2025-01-09 02:56:52,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:52,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59833160] [2025-01-09 02:56:52,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:56:52,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:52,705 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-09 02:56:52,720 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 02:56:52,720 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:56:52,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 02:56:52,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:52,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59833160] [2025-01-09 02:56:52,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59833160] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:56:52,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724997511] [2025-01-09 02:56:52,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 02:56:52,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:52,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:52,865 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) [2025-01-09 02:56:52,867 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 [2025-01-09 02:56:52,896 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-09 02:56:52,913 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-09 02:56:52,913 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 02:56:52,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:52,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 54 conjuncts are in the unsatisfiable core [2025-01-09 02:56:52,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:56:52,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-01-09 02:56:53,070 INFO L349 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2025-01-09 02:56:53,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2025-01-09 02:56:53,163 INFO L349 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2025-01-09 02:56:53,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2025-01-09 02:56:53,245 INFO L349 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2025-01-09 02:56:53,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2025-01-09 02:56:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 02:56:53,378 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:56:53,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2025-01-09 02:56:53,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 02:56:53,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 87 [2025-01-09 02:56:53,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-09 02:56:53,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 56 [2025-01-09 02:56:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-01-09 02:56:53,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724997511] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:56:53,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:56:53,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 14] total 28 [2025-01-09 02:56:53,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646894743] [2025-01-09 02:56:53,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:56:53,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-09 02:56:53,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:53,935 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-09 02:56:53,935 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2025-01-09 02:56:53,935 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2025-01-09 02:56:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:56:54,452 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2025-01-09 02:56:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-01-09 02:56:54,452 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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 24 [2025-01-09 02:56:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:56:54,452 INFO L225 Difference]: With dead ends: 61 [2025-01-09 02:56:54,452 INFO L226 Difference]: Without dead ends: 54 [2025-01-09 02:56:54,453 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2025-01-09 02:56:54,453 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 73 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 02:56:54,454 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 175 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 02:56:54,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-01-09 02:56:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2025-01-09 02:56:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 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) [2025-01-09 02:56:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2025-01-09 02:56:54,458 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 24 [2025-01-09 02:56:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:56:54,458 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2025-01-09 02:56:54,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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) [2025-01-09 02:56:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2025-01-09 02:56:54,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-01-09 02:56:54,458 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:54,458 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1] [2025-01-09 02:56:54,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 02:56:54,663 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 [2025-01-09 02:56:54,663 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:54,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:54,664 INFO L85 PathProgramCache]: Analyzing trace with hash -755245847, now seen corresponding path program 2 times [2025-01-09 02:56:54,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:54,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056732795] [2025-01-09 02:56:54,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:56:54,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:54,670 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-09 02:56:54,680 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 02:56:54,680 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:56:54,680 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 02:56:54,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:54,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056732795] [2025-01-09 02:56:54,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056732795] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:56:54,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648094474] [2025-01-09 02:56:54,829 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 02:56:54,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:54,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:54,831 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) [2025-01-09 02:56:54,832 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 [2025-01-09 02:56:54,861 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-01-09 02:56:54,879 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-01-09 02:56:54,879 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 02:56:54,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:54,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-09 02:56:54,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 02:56:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 02:56:54,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 02:56:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 02:56:55,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648094474] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 02:56:55,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 02:56:55,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2025-01-09 02:56:55,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729932032] [2025-01-09 02:56:55,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 02:56:55,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-01-09 02:56:55,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 02:56:55,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-01-09 02:56:55,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2025-01-09 02:56:55,009 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 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) [2025-01-09 02:56:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 02:56:55,485 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2025-01-09 02:56:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 02:56:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 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 30 [2025-01-09 02:56:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 02:56:55,486 INFO L225 Difference]: With dead ends: 122 [2025-01-09 02:56:55,486 INFO L226 Difference]: Without dead ends: 112 [2025-01-09 02:56:55,487 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2025-01-09 02:56:55,487 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 290 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 02:56:55,487 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 206 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 02:56:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-01-09 02:56:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 55. [2025-01-09 02:56:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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) [2025-01-09 02:56:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2025-01-09 02:56:55,494 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 30 [2025-01-09 02:56:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 02:56:55,494 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2025-01-09 02:56:55,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 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) [2025-01-09 02:56:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2025-01-09 02:56:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-01-09 02:56:55,495 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 02:56:55,495 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 3, 2, 2, 1, 1, 1, 1, 1] [2025-01-09 02:56:55,501 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 [2025-01-09 02:56:55,698 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 [2025-01-09 02:56:55,698 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 02:56:55,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 02:56:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1010573335, now seen corresponding path program 3 times [2025-01-09 02:56:55,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 02:56:55,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787905386] [2025-01-09 02:56:55,699 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:56:55,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 02:56:55,708 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 15 equivalence classes. [2025-01-09 02:56:55,898 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 54 of 54 statements. [2025-01-09 02:56:55,901 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-01-09 02:56:55,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 02:56:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-09 02:56:56,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 02:56:56,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787905386] [2025-01-09 02:56:56,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787905386] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 02:56:56,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639490740] [2025-01-09 02:56:56,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 02:56:56,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 02:56:56,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 02:56:56,422 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) [2025-01-09 02:56:56,424 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 [2025-01-09 02:56:56,462 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 54 statements into 15 equivalence classes.