./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-1.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 f509ea043fca36ef43b47e8e4046575373359a8f764b4f176c2773bac324a507 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 12:48:36,240 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 12:48:36,288 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 12:48:36,292 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 12:48:36,292 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 12:48:36,316 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 12:48:36,317 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 12:48:36,317 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 12:48:36,318 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 12:48:36,318 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 12:48:36,318 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 12:48:36,319 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 12:48:36,319 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 12:48:36,319 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 12:48:36,319 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 12:48:36,319 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 12:48:36,320 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 12:48:36,320 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 12:48:36,320 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 12:48:36,320 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 12:48:36,320 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 12:48:36,320 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 12:48:36,320 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 12:48:36,320 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 12:48:36,320 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 12:48:36,321 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 12:48:36,321 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 12:48:36,321 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 12:48:36,321 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 12:48:36,321 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 12:48:36,321 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 12:48:36,322 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 12:48:36,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 12:48:36,322 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 12:48:36,322 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 12:48:36,322 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 12:48:36,322 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 12:48:36,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 12:48:36,322 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 12:48:36,322 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 12:48:36,322 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 12:48:36,322 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 12:48:36,322 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 12:48:36,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 12:48:36,323 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 12:48:36,323 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 12:48:36,323 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 12:48:36,323 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 12:48:36,323 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 -> f509ea043fca36ef43b47e8e4046575373359a8f764b4f176c2773bac324a507 [2025-01-09 12:48:36,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 12:48:36,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 12:48:36,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 12:48:36,548 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 12:48:36,549 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 12:48:36,550 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-1.i [2025-01-09 12:48:37,676 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6d4564d5f/afa7739e93004a05b7fc38d6a11dc77a/FLAG59e53dd78 [2025-01-09 12:48:37,933 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 12:48:37,934 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-1.i [2025-01-09 12:48:37,943 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6d4564d5f/afa7739e93004a05b7fc38d6a11dc77a/FLAG59e53dd78 [2025-01-09 12:48:38,247 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6d4564d5f/afa7739e93004a05b7fc38d6a11dc77a [2025-01-09 12:48:38,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 12:48:38,250 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 12:48:38,251 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 12:48:38,252 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 12:48:38,255 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 12:48:38,255 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,256 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@402ab870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38, skipping insertion in model container [2025-01-09 12:48:38,256 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,274 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 12:48:38,377 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/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-1.i[915,928] [2025-01-09 12:48:38,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 12:48:38,436 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 12:48:38,442 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/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-1.i[915,928] [2025-01-09 12:48:38,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 12:48:38,495 INFO L204 MainTranslator]: Completed translation [2025-01-09 12:48:38,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38 WrapperNode [2025-01-09 12:48:38,496 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 12:48:38,496 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 12:48:38,496 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 12:48:38,496 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 12:48:38,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,545 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 262 [2025-01-09 12:48:38,546 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 12:48:38,547 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 12:48:38,547 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 12:48:38,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 12:48:38,554 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,561 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,582 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-01-09 12:48:38,582 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,583 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,593 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,599 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,602 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,606 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,609 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,613 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 12:48:38,614 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 12:48:38,614 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 12:48:38,614 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 12:48:38,615 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (1/1) ... [2025-01-09 12:48:38,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 12:48:38,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 12:48:38,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-09 12:48:38,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-09 12:48:38,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 12:48:38,659 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-01-09 12:48:38,660 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-01-09 12:48:38,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 12:48:38,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 12:48:38,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 12:48:38,717 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 12:48:38,718 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 12:48:39,122 INFO L? ?]: Removed 34 outVars from TransFormulas that were not future-live. [2025-01-09 12:48:39,123 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 12:48:39,133 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 12:48:39,133 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-09 12:48:39,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 12:48:39 BoogieIcfgContainer [2025-01-09 12:48:39,134 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 12:48:39,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 12:48:39,136 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 12:48:39,139 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 12:48:39,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 12:48:38" (1/3) ... [2025-01-09 12:48:39,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ed4b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 12:48:39, skipping insertion in model container [2025-01-09 12:48:39,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 12:48:38" (2/3) ... [2025-01-09 12:48:39,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ed4b0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 12:48:39, skipping insertion in model container [2025-01-09 12:48:39,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 12:48:39" (3/3) ... [2025-01-09 12:48:39,141 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-1loop_file-1.i [2025-01-09 12:48:39,152 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 12:48:39,155 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_loopvsstraightlinecode_100-1loop_file-1.i that has 2 procedures, 115 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-01-09 12:48:39,195 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 12:48:39,204 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;@aa6728c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 12:48:39,204 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 12:48:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 79 states have (on average 1.4556962025316456) internal successors, (115), 80 states have internal predecessors, (115), 33 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2025-01-09 12:48:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2025-01-09 12:48:39,218 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 12:48:39,218 INFO L218 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 12:48:39,219 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 12:48:39,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 12:48:39,223 INFO L85 PathProgramCache]: Analyzing trace with hash -961302797, now seen corresponding path program 1 times [2025-01-09 12:48:39,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 12:48:39,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927650009] [2025-01-09 12:48:39,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 12:48:39,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 12:48:39,316 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 213 statements into 1 equivalence classes. [2025-01-09 12:48:39,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 213 of 213 statements. [2025-01-09 12:48:39,339 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 12:48:39,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 12:48:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2025-01-09 12:48:39,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 12:48:39,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927650009] [2025-01-09 12:48:39,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927650009] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 12:48:39,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089984045] [2025-01-09 12:48:39,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 12:48:39,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 12:48:39,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 12:48:39,574 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 12:48:39,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-09 12:48:39,672 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 213 statements into 1 equivalence classes. [2025-01-09 12:48:39,756 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 213 of 213 statements. [2025-01-09 12:48:39,757 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 12:48:39,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 12:48:39,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-01-09 12:48:39,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 12:48:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2025-01-09 12:48:39,797 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 12:48:39,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089984045] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 12:48:39,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 12:48:39,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-01-09 12:48:39,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344401876] [2025-01-09 12:48:39,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 12:48:39,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 12:48:39,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 12:48:39,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 12:48:39,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 12:48:39,817 INFO L87 Difference]: Start difference. First operand has 115 states, 79 states have (on average 1.4556962025316456) internal successors, (115), 80 states have internal predecessors, (115), 33 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 2 states have call successors, (33) [2025-01-09 12:48:39,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 12:48:39,842 INFO L93 Difference]: Finished difference Result 227 states and 392 transitions. [2025-01-09 12:48:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 12:48:39,843 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 2 states have call successors, (33) Word has length 213 [2025-01-09 12:48:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 12:48:39,847 INFO L225 Difference]: With dead ends: 227 [2025-01-09 12:48:39,848 INFO L226 Difference]: Without dead ends: 112 [2025-01-09 12:48:39,851 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 12:48:39,854 INFO L435 NwaCegarLoop]: 179 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 12:48:39,854 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 12:48:39,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2025-01-09 12:48:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2025-01-09 12:48:39,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 77 states have (on average 1.4285714285714286) internal successors, (110), 77 states have internal predecessors, (110), 33 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2025-01-09 12:48:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 176 transitions. [2025-01-09 12:48:39,885 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 176 transitions. Word has length 213 [2025-01-09 12:48:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 12:48:39,885 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 176 transitions. [2025-01-09 12:48:39,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 2 states have call successors, (33) [2025-01-09 12:48:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 176 transitions. [2025-01-09 12:48:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2025-01-09 12:48:39,888 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 12:48:39,888 INFO L218 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 12:48:39,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 12:48:40,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-01-09 12:48:40,090 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 12:48:40,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 12:48:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1067521029, now seen corresponding path program 1 times [2025-01-09 12:48:40,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 12:48:40,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996127911] [2025-01-09 12:48:40,093 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 12:48:40,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 12:48:40,114 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 213 statements into 1 equivalence classes. [2025-01-09 12:48:40,169 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 213 of 213 statements. [2025-01-09 12:48:40,169 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 12:48:40,169 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 12:48:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2025-01-09 12:48:40,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 12:48:40,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996127911] [2025-01-09 12:48:40,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996127911] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 12:48:40,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 12:48:40,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 12:48:40,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542045362] [2025-01-09 12:48:40,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 12:48:40,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 12:48:40,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 12:48:40,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 12:48:40,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 12:48:40,472 INFO L87 Difference]: Start difference. First operand 112 states and 176 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2025-01-09 12:48:40,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 12:48:40,536 INFO L93 Difference]: Finished difference Result 330 states and 522 transitions. [2025-01-09 12:48:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 12:48:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) Word has length 213 [2025-01-09 12:48:40,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 12:48:40,540 INFO L225 Difference]: With dead ends: 330 [2025-01-09 12:48:40,540 INFO L226 Difference]: Without dead ends: 221 [2025-01-09 12:48:40,540 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 [2025-01-09 12:48:40,543 INFO L435 NwaCegarLoop]: 173 mSDtfsCounter, 105 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 12:48:40,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 512 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 12:48:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2025-01-09 12:48:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2025-01-09 12:48:40,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 150 states have (on average 1.4333333333333333) internal successors, (215), 150 states have internal predecessors, (215), 66 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2025-01-09 12:48:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 347 transitions. [2025-01-09 12:48:40,574 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 347 transitions. Word has length 213 [2025-01-09 12:48:40,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 12:48:40,574 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 347 transitions. [2025-01-09 12:48:40,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (33), 1 states have call predecessors, (33), 1 states have return successors, (33), 1 states have call predecessors, (33), 1 states have call successors, (33) [2025-01-09 12:48:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 347 transitions. [2025-01-09 12:48:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2025-01-09 12:48:40,576 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 12:48:40,576 INFO L218 NwaCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 12:48:40,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-09 12:48:40,577 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 12:48:40,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 12:48:40,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1910321797, now seen corresponding path program 1 times [2025-01-09 12:48:40,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 12:48:40,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893610671] [2025-01-09 12:48:40,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 12:48:40,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 12:48:40,601 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 214 statements into 1 equivalence classes. [2025-01-09 12:48:40,937 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 214 of 214 statements. [2025-01-09 12:48:40,937 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 12:48:40,937 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 12:48:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 240 proven. 246 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2025-01-09 12:48:43,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 12:48:43,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893610671] [2025-01-09 12:48:43,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893610671] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 12:48:43,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431817522] [2025-01-09 12:48:43,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 12:48:43,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 12:48:43,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 12:48:43,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 12:48:43,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-09 12:48:43,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 214 statements into 1 equivalence classes. [2025-01-09 12:48:43,987 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 214 of 214 statements. [2025-01-09 12:48:43,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 12:48:43,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 12:48:43,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-01-09 12:48:43,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 12:48:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1555 proven. 246 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2025-01-09 12:48:50,492 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 12:49:00,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431817522] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 12:49:00,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-09 12:49:00,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 31 [2025-01-09 12:49:00,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148435533] [2025-01-09 12:49:00,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-09 12:49:00,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-01-09 12:49:00,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 12:49:00,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-01-09 12:49:00,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1127, Unknown=3, NotChecked=0, Total=1332 [2025-01-09 12:49:00,098 INFO L87 Difference]: Start difference. First operand 219 states and 347 transitions. Second operand has 31 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 30 states have internal predecessors, (112), 12 states have call successors, (64), 7 states have call predecessors, (64), 13 states have return successors, (64), 12 states have call predecessors, (64), 12 states have call successors, (64) [2025-01-09 12:49:15,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:49:20,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:49:24,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:49:29,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:49:34,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:49:38,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:49:42,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:49:46,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:49:50,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:49:55,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:49:59,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:50:03,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:50:07,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:50:11,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:50:15,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2025-01-09 12:50:20,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]