./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/rule60_list2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d 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/ldv-regression/rule60_list2.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 ec34d681fc532ab8881c0bb28aeb7b8d0ef0df29d4602290c71f943db752a206 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:02:53,226 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:02:53,264 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:02:53,267 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:02:53,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:02:53,281 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:02:53,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:02:53,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:02:53,282 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:02:53,282 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:02:53,282 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:02:53,282 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:02:53,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:02:53,282 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:02:53,282 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:02:53,282 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:02:53,282 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:02:53,282 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:02:53,282 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:02:53,282 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:02:53,283 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:02:53,283 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:02:53,283 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:02:53,284 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:02:53,284 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:02:53,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:02:53,284 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:02:53,284 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:02:53,284 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:02:53,284 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:02:53,284 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 -> ec34d681fc532ab8881c0bb28aeb7b8d0ef0df29d4602290c71f943db752a206 [2025-02-07 20:02:53,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:02:53,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:02:53,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:02:53,514 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:02:53,514 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:02:53,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/rule60_list2.i [2025-02-07 20:02:54,681 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/90ba5abf7/437aeb990f13498fa1059df6600aed56/FLAG0e5e4c6f4 [2025-02-07 20:02:54,902 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:02:54,903 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.i [2025-02-07 20:02:54,935 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/90ba5abf7/437aeb990f13498fa1059df6600aed56/FLAG0e5e4c6f4 [2025-02-07 20:02:55,256 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/90ba5abf7/437aeb990f13498fa1059df6600aed56 [2025-02-07 20:02:55,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:02:55,263 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:02:55,268 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:02:55,268 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:02:55,273 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:02:55,274 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570cf47b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55, skipping insertion in model container [2025-02-07 20:02:55,278 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,301 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:02:55,445 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/ldv-regression/rule60_list2.i[292,305] [2025-02-07 20:02:55,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:02:55,559 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:02:55,565 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/ldv-regression/rule60_list2.i[292,305] [2025-02-07 20:02:55,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:02:55,615 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:02:55,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55 WrapperNode [2025-02-07 20:02:55,616 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:02:55,617 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:02:55,617 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:02:55,617 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:02:55,621 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,630 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,644 INFO L138 Inliner]: procedures = 126, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2025-02-07 20:02:55,645 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:02:55,646 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:02:55,646 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:02:55,646 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:02:55,651 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,655 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,666 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 0, 2]. 50 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 0, 2]. The 0 writes are split as follows [0, 0, 0]. [2025-02-07 20:02:55,666 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,666 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,669 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,669 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,670 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,671 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:02:55,672 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:02:55,672 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:02:55,672 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:02:55,673 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (1/1) ... [2025-02-07 20:02:55,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:02:55,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:02:55,697 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) [2025-02-07 20:02:55,705 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 [2025-02-07 20:02:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2025-02-07 20:02:55,718 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2025-02-07 20:02:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:02:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2025-02-07 20:02:55,718 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2025-02-07 20:02:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-02-07 20:02:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-02-07 20:02:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-02-07 20:02:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2025-02-07 20:02:55,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2025-02-07 20:02:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:02:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-07 20:02:55,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-02-07 20:02:55,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:02:55,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:02:55,783 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:02:55,784 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:02:55,839 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L529: havoc #t~ret8#1.base, #t~ret8#1.offset; [2025-02-07 20:02:55,914 INFO L? ?]: Removed 24 outVars from TransFormulas that were not future-live. [2025-02-07 20:02:55,915 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:02:55,921 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:02:55,921 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:02:55,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:02:55 BoogieIcfgContainer [2025-02-07 20:02:55,921 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:02:55,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:02:55,923 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:02:55,926 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:02:55,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:02:55" (1/3) ... [2025-02-07 20:02:55,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6f57d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:02:55, skipping insertion in model container [2025-02-07 20:02:55,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:02:55" (2/3) ... [2025-02-07 20:02:55,927 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f6f57d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:02:55, skipping insertion in model container [2025-02-07 20:02:55,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:02:55" (3/3) ... [2025-02-07 20:02:55,928 INFO L128 eAbstractionObserver]: Analyzing ICFG rule60_list2.i [2025-02-07 20:02:55,938 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:02:55,939 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG rule60_list2.i that has 4 procedures, 34 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-07 20:02:55,975 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:02:55,982 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;@10b45287, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:02:55,983 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:02:55,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-07 20:02:55,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-07 20:02:55,990 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:02:55,990 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-07 20:02:55,991 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:02:55,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:02:55,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1994189628, now seen corresponding path program 1 times [2025-02-07 20:02:56,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:02:56,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601639545] [2025-02-07 20:02:56,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:02:56,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:02:56,065 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-07 20:02:56,077 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-07 20:02:56,077 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:02:56,079 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:02:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:02:56,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:02:56,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601639545] [2025-02-07 20:02:56,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601639545] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:02:56,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:02:56,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-07 20:02:56,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517253753] [2025-02-07 20:02:56,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:02:56,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:02:56,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:02:56,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:02:56,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 20:02:56,212 INFO L87 Difference]: Start difference. First operand has 34 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:02:56,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:02:56,262 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2025-02-07 20:02:56,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:02:56,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2025-02-07 20:02:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:02:56,268 INFO L225 Difference]: With dead ends: 63 [2025-02-07 20:02:56,268 INFO L226 Difference]: Without dead ends: 27 [2025-02-07 20:02:56,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:02:56,274 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:02:56,275 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 89 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:02:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-07 20:02:56,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-07 20:02:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 20:02:56,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2025-02-07 20:02:56,298 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 6 [2025-02-07 20:02:56,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:02:56,298 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2025-02-07 20:02:56,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:02:56,299 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2025-02-07 20:02:56,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 20:02:56,300 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:02:56,300 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:02:56,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 20:02:56,302 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:02:56,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:02:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash 916887893, now seen corresponding path program 1 times [2025-02-07 20:02:56,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:02:56,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819275355] [2025-02-07 20:02:56,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:02:56,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:02:56,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 20:02:56,342 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 20:02:56,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:02:56,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:02:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:02:56,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:02:56,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819275355] [2025-02-07 20:02:56,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819275355] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:02:56,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264938533] [2025-02-07 20:02:56,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:02:56,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:02:56,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:02:56,720 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) [2025-02-07 20:02:56,721 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 [2025-02-07 20:02:56,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 20:02:56,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 20:02:56,802 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:02:56,802 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:02:56,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-07 20:02:56,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:02:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-07 20:02:57,060 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:02:57,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264938533] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:02:57,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:02:57,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2025-02-07 20:02:57,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767408325] [2025-02-07 20:02:57,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:02:57,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 20:02:57,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:02:57,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 20:02:57,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:02:57,062 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:02:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:02:57,268 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2025-02-07 20:02:57,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 20:02:57,268 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2025-02-07 20:02:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:02:57,270 INFO L225 Difference]: With dead ends: 53 [2025-02-07 20:02:57,270 INFO L226 Difference]: Without dead ends: 44 [2025-02-07 20:02:57,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2025-02-07 20:02:57,271 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:02:57,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 93 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:02:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-07 20:02:57,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2025-02-07 20:02:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 7 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2025-02-07 20:02:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2025-02-07 20:02:57,308 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2025-02-07 20:02:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:02:57,308 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2025-02-07 20:02:57,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-07 20:02:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2025-02-07 20:02:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 20:02:57,308 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:02:57,308 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:02:57,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 20:02:57,513 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 [2025-02-07 20:02:57,513 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:02:57,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:02:57,513 INFO L85 PathProgramCache]: Analyzing trace with hash 927271893, now seen corresponding path program 1 times [2025-02-07 20:02:57,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:02:57,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799236096] [2025-02-07 20:02:57,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:02:57,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:02:57,521 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-07 20:02:57,525 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 20:02:57,525 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:02:57,525 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:02:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:02:57,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:02:57,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799236096] [2025-02-07 20:02:57,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799236096] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:02:57,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63896721] [2025-02-07 20:02:57,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:02:57,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:02:57,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:02:57,737 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) [2025-02-07 20:02:57,739 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 [2025-02-07 20:02:57,779 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-07 20:02:57,798 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 20:02:57,798 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:02:57,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:02:57,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-07 20:02:57,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:02:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:02:57,903 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:02:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:02:58,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63896721] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:02:58,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:02:58,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 20 [2025-02-07 20:02:58,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965631857] [2025-02-07 20:02:58,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:02:58,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-07 20:02:58,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:02:58,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-07 20:02:58,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:02:58,124 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-07 20:02:58,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:02:58,385 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2025-02-07 20:02:58,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-07 20:02:58,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2025-02-07 20:02:58,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:02:58,385 INFO L225 Difference]: With dead ends: 53 [2025-02-07 20:02:58,385 INFO L226 Difference]: Without dead ends: 46 [2025-02-07 20:02:58,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2025-02-07 20:02:58,386 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:02:58,387 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 120 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:02:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-02-07 20:02:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2025-02-07 20:02:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-07 20:02:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2025-02-07 20:02:58,391 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 30 [2025-02-07 20:02:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:02:58,391 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2025-02-07 20:02:58,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 5 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-07 20:02:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2025-02-07 20:02:58,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 20:02:58,392 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:02:58,392 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:02:58,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 20:02:58,596 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 [2025-02-07 20:02:58,596 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:02:58,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:02:58,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1624885068, now seen corresponding path program 1 times [2025-02-07 20:02:58,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:02:58,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302475012] [2025-02-07 20:02:58,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:02:58,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:02:58,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-07 20:02:58,606 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 20:02:58,606 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:02:58,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:02:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:02:58,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:02:58,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302475012] [2025-02-07 20:02:58,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302475012] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:02:58,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137842900] [2025-02-07 20:02:58,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:02:58,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:02:58,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:02:58,730 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) [2025-02-07 20:02:58,731 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 [2025-02-07 20:02:58,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-07 20:02:58,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 20:02:58,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:02:58,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:02:58,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 20:02:58,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:02:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:02:59,015 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:02:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:02:59,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137842900] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:02:59,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:02:59,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2025-02-07 20:02:59,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520765622] [2025-02-07 20:02:59,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:02:59,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-07 20:02:59,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:02:59,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-07 20:02:59,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2025-02-07 20:02:59,245 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-02-07 20:02:59,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:02:59,535 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2025-02-07 20:02:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 20:02:59,535 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 30 [2025-02-07 20:02:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:02:59,536 INFO L225 Difference]: With dead ends: 52 [2025-02-07 20:02:59,536 INFO L226 Difference]: Without dead ends: 49 [2025-02-07 20:02:59,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2025-02-07 20:02:59,537 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 102 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:02:59,537 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 59 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:02:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-02-07 20:02:59,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2025-02-07 20:02:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-07 20:02:59,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2025-02-07 20:02:59,542 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 30 [2025-02-07 20:02:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:02:59,542 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2025-02-07 20:02:59,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-02-07 20:02:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2025-02-07 20:02:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 20:02:59,543 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:02:59,543 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:02:59,549 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 [2025-02-07 20:02:59,744 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 [2025-02-07 20:02:59,744 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:02:59,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:02:59,744 INFO L85 PathProgramCache]: Analyzing trace with hash 260315004, now seen corresponding path program 1 times [2025-02-07 20:02:59,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:02:59,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97134677] [2025-02-07 20:02:59,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:02:59,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:02:59,751 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:02:59,754 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:02:59,754 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:02:59,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:03:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:03:00,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:03:00,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97134677] [2025-02-07 20:03:00,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97134677] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:03:00,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947185386] [2025-02-07 20:03:00,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:03:00,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:03:00,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:03:00,049 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) [2025-02-07 20:03:00,051 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 [2025-02-07 20:03:00,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:03:00,112 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:03:00,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:03:00,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:03:00,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-07 20:03:00,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:03:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:03:00,349 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:03:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:03:00,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947185386] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:03:00,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:03:00,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 31 [2025-02-07 20:03:00,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366908416] [2025-02-07 20:03:00,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:03:00,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-07 20:03:00,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:03:00,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-07 20:03:00,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=862, Unknown=0, NotChecked=0, Total=930 [2025-02-07 20:03:00,631 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 31 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2025-02-07 20:03:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:03:01,263 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2025-02-07 20:03:01,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-07 20:03:01,263 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 40 [2025-02-07 20:03:01,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:03:01,266 INFO L225 Difference]: With dead ends: 59 [2025-02-07 20:03:01,266 INFO L226 Difference]: Without dead ends: 52 [2025-02-07 20:03:01,267 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2025-02-07 20:03:01,271 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:03:01,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 127 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:03:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2025-02-07 20:03:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2025-02-07 20:03:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-02-07 20:03:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2025-02-07 20:03:01,279 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 40 [2025-02-07 20:03:01,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:03:01,280 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2025-02-07 20:03:01,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 23 states have internal predecessors, (54), 7 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2025-02-07 20:03:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2025-02-07 20:03:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 20:03:01,280 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:03:01,280 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:03:01,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 20:03:01,481 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 [2025-02-07 20:03:01,481 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:03:01,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:03:01,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1147818685, now seen corresponding path program 1 times [2025-02-07 20:03:01,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:03:01,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862220376] [2025-02-07 20:03:01,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:03:01,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:03:01,492 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:03:01,495 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:03:01,495 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:03:01,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:03:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:03:01,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:03:01,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862220376] [2025-02-07 20:03:01,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862220376] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:03:01,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389187678] [2025-02-07 20:03:01,722 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:03:01,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:03:01,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:03:01,724 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) [2025-02-07 20:03:01,725 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 [2025-02-07 20:03:01,762 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:03:01,781 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:03:01,781 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:03:01,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:03:01,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-07 20:03:01,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:03:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:03:02,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:03:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-07 20:03:02,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389187678] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:03:02,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:03:02,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2025-02-07 20:03:02,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713523250] [2025-02-07 20:03:02,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:03:02,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-07 20:03:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:03:02,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-07 20:03:02,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2025-02-07 20:03:02,302 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 30 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2025-02-07 20:03:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:03:02,909 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2025-02-07 20:03:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 20:03:02,909 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 40 [2025-02-07 20:03:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:03:02,910 INFO L225 Difference]: With dead ends: 55 [2025-02-07 20:03:02,910 INFO L226 Difference]: Without dead ends: 35 [2025-02-07 20:03:02,910 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=282, Invalid=2370, Unknown=0, NotChecked=0, Total=2652 [2025-02-07 20:03:02,911 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:03:02,911 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 221 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:03:02,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2025-02-07 20:03:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2025-02-07 20:03:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-02-07 20:03:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2025-02-07 20:03:02,915 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 40 [2025-02-07 20:03:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:03:02,915 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2025-02-07 20:03:02,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 23 states have internal predecessors, (52), 8 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2025-02-07 20:03:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2025-02-07 20:03:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2025-02-07 20:03:02,916 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:03:02,916 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:03:02,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 20:03:03,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:03:03,117 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:03:03,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:03:03,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1536636355, now seen corresponding path program 1 times [2025-02-07 20:03:03,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:03:03,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640346187] [2025-02-07 20:03:03,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:03:03,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:03:03,129 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:03:03,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:03:03,133 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:03:03,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:03:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:03:03,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:03:03,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640346187] [2025-02-07 20:03:03,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640346187] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:03:03,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594487254] [2025-02-07 20:03:03,226 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:03:03,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:03:03,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:03:03,228 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:03:03,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 20:03:03,265 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-02-07 20:03:03,283 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-02-07 20:03:03,283 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:03:03,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:03:03,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-07 20:03:03,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:03:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-07 20:03:03,426 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:03:03,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594487254] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:03:03,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:03:03,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2025-02-07 20:03:03,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088760151] [2025-02-07 20:03:03,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:03:03,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 20:03:03,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:03:03,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 20:03:03,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2025-02-07 20:03:03,428 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-07 20:03:03,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:03:03,556 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2025-02-07 20:03:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-07 20:03:03,556 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2025-02-07 20:03:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:03:03,556 INFO L225 Difference]: With dead ends: 38 [2025-02-07 20:03:03,556 INFO L226 Difference]: Without dead ends: 0 [2025-02-07 20:03:03,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2025-02-07 20:03:03,557 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:03:03,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 67 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:03:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-07 20:03:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-07 20:03:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2025-02-07 20:03:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-07 20:03:03,558 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 40 [2025-02-07 20:03:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:03:03,558 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-07 20:03:03,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-02-07 20:03:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-07 20:03:03,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-07 20:03:03,561 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-07 20:03:03,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-07 20:03:03,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-07 20:03:03,764 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:03:03,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-02-07 20:03:04,294 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-07 20:03:04,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 08:03:04 BoogieIcfgContainer [2025-02-07 20:03:04,298 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-07 20:03:04,298 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-07 20:03:04,299 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-07 20:03:04,299 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-07 20:03:04,299 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:02:55" (3/4) ... [2025-02-07 20:03:04,300 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-07 20:03:04,304 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure my_malloc [2025-02-07 20:03:04,304 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure list_add [2025-02-07 20:03:04,304 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __blast_assert [2025-02-07 20:03:04,307 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2025-02-07 20:03:04,307 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2025-02-07 20:03:04,307 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-07 20:03:04,307 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-07 20:03:04,370 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-07 20:03:04,371 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-07 20:03:04,371 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-07 20:03:04,371 INFO L158 Benchmark]: Toolchain (without parser) took 9108.93ms. Allocated memory was 142.6MB in the beginning and 285.2MB in the end (delta: 142.6MB). Free memory was 109.0MB in the beginning and 251.9MB in the end (delta: -143.0MB). Peak memory consumption was 162.1MB. Max. memory is 16.1GB. [2025-02-07 20:03:04,371 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 201.3MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 20:03:04,372 INFO L158 Benchmark]: CACSL2BoogieTranslator took 350.95ms. Allocated memory is still 142.6MB. Free memory was 109.0MB in the beginning and 91.4MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-07 20:03:04,372 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.67ms. Allocated memory is still 142.6MB. Free memory was 91.4MB in the beginning and 90.5MB in the end (delta: 936.5kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 20:03:04,372 INFO L158 Benchmark]: Boogie Preprocessor took 25.91ms. Allocated memory is still 142.6MB. Free memory was 90.5MB in the beginning and 88.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 20:03:04,372 INFO L158 Benchmark]: IcfgBuilder took 249.31ms. Allocated memory is still 142.6MB. Free memory was 88.8MB in the beginning and 74.8MB in the end (delta: 14.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-07 20:03:04,372 INFO L158 Benchmark]: TraceAbstraction took 8375.26ms. Allocated memory was 142.6MB in the beginning and 285.2MB in the end (delta: 142.6MB). Free memory was 73.8MB in the beginning and 96.8MB in the end (delta: -22.9MB). Peak memory consumption was 120.2MB. Max. memory is 16.1GB. [2025-02-07 20:03:04,373 INFO L158 Benchmark]: Witness Printer took 72.29ms. Allocated memory is still 285.2MB. Free memory was 96.8MB in the beginning and 251.9MB in the end (delta: -155.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-07 20:03:04,373 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 201.3MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 350.95ms. Allocated memory is still 142.6MB. Free memory was 109.0MB in the beginning and 91.4MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.67ms. Allocated memory is still 142.6MB. Free memory was 91.4MB in the beginning and 90.5MB in the end (delta: 936.5kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.91ms. Allocated memory is still 142.6MB. Free memory was 90.5MB in the beginning and 88.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 249.31ms. Allocated memory is still 142.6MB. Free memory was 88.8MB in the beginning and 74.8MB in the end (delta: 14.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 8375.26ms. Allocated memory was 142.6MB in the beginning and 285.2MB in the end (delta: 142.6MB). Free memory was 73.8MB in the beginning and 96.8MB in the end (delta: -22.9MB). Peak memory consumption was 120.2MB. Max. memory is 16.1GB. * Witness Printer took 72.29ms. Allocated memory is still 285.2MB. Free memory was 96.8MB in the beginning and 251.9MB in the end (delta: -155.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 6]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.8s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 383 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 383 mSDsluCounter, 776 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 658 mSDsCounter, 190 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2777 IncrementalHoareTripleChecker+Invalid, 2967 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 190 mSolverCounterUnsat, 118 mSDtfsCounter, 2777 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 510 GetRequests, 257 SyntacticMatches, 37 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=5, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 25 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 412 NumberOfCodeBlocks, 412 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 535 ConstructedInterpolants, 0 QuantifiedInterpolants, 1831 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1276 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 131/188 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-07 20:03:04,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE