./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 b50c918f4161b5cc99814dedbb1d5f1068fe72db189eac8c3c500593eb4daaee --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 01:07:14,004 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 01:07:14,053 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 01:07:14,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 01:07:14,062 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 01:07:14,082 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 01:07:14,083 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 01:07:14,083 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 01:07:14,083 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 01:07:14,084 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 01:07:14,084 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 01:07:14,084 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 01:07:14,085 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 01:07:14,085 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 01:07:14,085 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 01:07:14,085 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 01:07:14,085 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 01:07:14,086 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 01:07:14,086 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 01:07:14,086 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 01:07:14,086 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 01:07:14,086 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 01:07:14,086 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 01:07:14,086 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 01:07:14,086 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 01:07:14,086 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 01:07:14,086 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 01:07:14,087 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 01:07:14,087 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 01:07:14,087 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 01:07:14,087 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 01:07:14,087 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 01:07:14,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 01:07:14,088 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 01:07:14,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 01:07:14,088 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 01:07:14,088 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 01:07:14,088 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 01:07:14,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 01:07:14,088 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 01:07:14,088 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 01:07:14,088 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 01:07:14,088 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 01:07:14,088 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/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 -> b50c918f4161b5cc99814dedbb1d5f1068fe72db189eac8c3c500593eb4daaee [2025-03-17 01:07:14,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 01:07:14,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 01:07:14,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 01:07:14,338 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 01:07:14,338 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 01:07:14,339 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i [2025-03-17 01:07:15,501 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d8ade3f/2577a8616f4d4044872164e258924fa5/FLAG9642b13f7 [2025-03-17 01:07:15,784 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 01:07:15,784 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i [2025-03-17 01:07:15,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d8ade3f/2577a8616f4d4044872164e258924fa5/FLAG9642b13f7 [2025-03-17 01:07:16,078 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43d8ade3f/2577a8616f4d4044872164e258924fa5 [2025-03-17 01:07:16,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 01:07:16,082 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 01:07:16,084 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 01:07:16,084 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 01:07:16,087 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 01:07:16,088 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,090 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@368dfe1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16, skipping insertion in model container [2025-03-17 01:07:16,090 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,106 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 01:07:16,217 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i[919,932] [2025-03-17 01:07:16,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 01:07:16,315 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 01:07:16,323 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i[919,932] [2025-03-17 01:07:16,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 01:07:16,365 INFO L204 MainTranslator]: Completed translation [2025-03-17 01:07:16,366 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16 WrapperNode [2025-03-17 01:07:16,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 01:07:16,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 01:07:16,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 01:07:16,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 01:07:16,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,417 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 237 [2025-03-17 01:07:16,418 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 01:07:16,418 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 01:07:16,419 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 01:07:16,419 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 01:07:16,425 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,428 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,444 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]. [2025-03-17 01:07:16,448 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,448 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,457 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,466 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 01:07:16,470 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 01:07:16,470 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 01:07:16,470 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 01:07:16,472 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (1/1) ... [2025-03-17 01:07:16,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 01:07:16,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 01:07:16,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 01:07:16,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 01:07:16,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 01:07:16,512 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-17 01:07:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-17 01:07:16,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 01:07:16,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 01:07:16,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 01:07:16,576 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 01:07:16,577 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 01:07:16,946 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2025-03-17 01:07:16,947 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 01:07:16,957 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 01:07:16,959 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 01:07:16,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 01:07:16 BoogieIcfgContainer [2025-03-17 01:07:16,960 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 01:07:16,962 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 01:07:16,962 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 01:07:16,965 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 01:07:16,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 01:07:16" (1/3) ... [2025-03-17 01:07:16,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca83c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 01:07:16, skipping insertion in model container [2025-03-17 01:07:16,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 01:07:16" (2/3) ... [2025-03-17 01:07:16,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca83c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 01:07:16, skipping insertion in model container [2025-03-17 01:07:16,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 01:07:16" (3/3) ... [2025-03-17 01:07:16,968 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i [2025-03-17 01:07:16,979 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 01:07:16,983 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_fillercode_fillercodestructure_filler-pe-co_file-12.i that has 2 procedures, 100 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-17 01:07:17,027 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 01:07:17,037 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;@93d741b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 01:07:17,037 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-17 01:07:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 56 states have internal predecessors, (80), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2025-03-17 01:07:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2025-03-17 01:07:17,052 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 01:07:17,052 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 01:07:17,053 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 01:07:17,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 01:07:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash -177353315, now seen corresponding path program 1 times [2025-03-17 01:07:17,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 01:07:17,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268901190] [2025-03-17 01:07:17,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 01:07:17,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 01:07:17,160 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 251 statements into 1 equivalence classes. [2025-03-17 01:07:17,185 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 251 of 251 statements. [2025-03-17 01:07:17,185 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 01:07:17,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 01:07:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2025-03-17 01:07:17,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 01:07:17,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268901190] [2025-03-17 01:07:17,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268901190] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 01:07:17,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103468331] [2025-03-17 01:07:17,394 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 01:07:17,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 01:07:17,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 01:07:17,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 01:07:17,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 01:07:17,480 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 251 statements into 1 equivalence classes. [2025-03-17 01:07:17,562 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 251 of 251 statements. [2025-03-17 01:07:17,563 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 01:07:17,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 01:07:17,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-17 01:07:17,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 01:07:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2025-03-17 01:07:17,604 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 01:07:17,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103468331] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 01:07:17,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 01:07:17,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-17 01:07:17,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359276600] [2025-03-17 01:07:17,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 01:07:17,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 01:07:17,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 01:07:17,622 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 01:07:17,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 01:07:17,624 INFO L87 Difference]: Start difference. First operand has 100 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 56 states have internal predecessors, (80), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) [2025-03-17 01:07:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 01:07:17,648 INFO L93 Difference]: Finished difference Result 197 states and 368 transitions. [2025-03-17 01:07:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 01:07:17,649 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) Word has length 251 [2025-03-17 01:07:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 01:07:17,654 INFO L225 Difference]: With dead ends: 197 [2025-03-17 01:07:17,654 INFO L226 Difference]: Without dead ends: 98 [2025-03-17 01:07:17,656 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 01:07:17,657 INFO L435 NwaCegarLoop]: 160 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, 160 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 [2025-03-17 01:07:17,658 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 01:07:17,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-17 01:07:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2025-03-17 01:07:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 54 states have internal predecessors, (76), 42 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2025-03-17 01:07:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 160 transitions. [2025-03-17 01:07:17,696 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 160 transitions. Word has length 251 [2025-03-17 01:07:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 01:07:17,696 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 160 transitions. [2025-03-17 01:07:17,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.0) internal successors, (46), 2 states have internal predecessors, (46), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 2 states have call successors, (42) [2025-03-17 01:07:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 160 transitions. [2025-03-17 01:07:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2025-03-17 01:07:17,700 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 01:07:17,700 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 01:07:17,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 01:07:17,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-03-17 01:07:17,901 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 01:07:17,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 01:07:17,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1781441825, now seen corresponding path program 1 times [2025-03-17 01:07:17,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 01:07:17,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295779720] [2025-03-17 01:07:17,902 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 01:07:17,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 01:07:17,925 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 251 statements into 1 equivalence classes. [2025-03-17 01:07:18,116 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 251 of 251 statements. [2025-03-17 01:07:18,116 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 01:07:18,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 01:07:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2025-03-17 01:07:18,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 01:07:18,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295779720] [2025-03-17 01:07:18,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295779720] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 01:07:18,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 01:07:18,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 01:07:18,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350049211] [2025-03-17 01:07:18,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 01:07:18,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 01:07:18,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 01:07:18,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 01:07:18,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 01:07:18,843 INFO L87 Difference]: Start difference. First operand 98 states and 160 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2025-03-17 01:07:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 01:07:19,272 INFO L93 Difference]: Finished difference Result 293 states and 479 transitions. [2025-03-17 01:07:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 01:07:19,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) Word has length 251 [2025-03-17 01:07:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 01:07:19,277 INFO L225 Difference]: With dead ends: 293 [2025-03-17 01:07:19,278 INFO L226 Difference]: Without dead ends: 196 [2025-03-17 01:07:19,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-17 01:07:19,281 INFO L435 NwaCegarLoop]: 154 mSDtfsCounter, 79 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 01:07:19,281 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 508 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 01:07:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2025-03-17 01:07:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 168. [2025-03-17 01:07:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 81 states have (on average 1.271604938271605) internal successors, (103), 81 states have internal predecessors, (103), 84 states have call successors, (84), 2 states have call predecessors, (84), 2 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2025-03-17 01:07:19,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 271 transitions. [2025-03-17 01:07:19,319 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 271 transitions. Word has length 251 [2025-03-17 01:07:19,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 01:07:19,321 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 271 transitions. [2025-03-17 01:07:19,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 1 states have call successors, (42), 1 states have call predecessors, (42), 1 states have return successors, (42), 1 states have call predecessors, (42), 1 states have call successors, (42) [2025-03-17 01:07:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 271 transitions. [2025-03-17 01:07:19,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2025-03-17 01:07:19,327 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 01:07:19,327 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 01:07:19,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 01:07:19,327 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 01:07:19,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 01:07:19,328 INFO L85 PathProgramCache]: Analyzing trace with hash 804521502, now seen corresponding path program 1 times [2025-03-17 01:07:19,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 01:07:19,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219994395] [2025-03-17 01:07:19,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 01:07:19,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 01:07:19,351 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 252 statements into 1 equivalence classes. [2025-03-17 01:07:19,461 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 252 of 252 statements. [2025-03-17 01:07:19,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 01:07:19,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 01:07:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 18 proven. 105 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2025-03-17 01:07:20,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 01:07:20,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219994395] [2025-03-17 01:07:20,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219994395] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 01:07:20,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511911462] [2025-03-17 01:07:20,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 01:07:20,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 01:07:20,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 01:07:20,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 01:07:20,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 01:07:20,266 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 252 statements into 1 equivalence classes. [2025-03-17 01:07:20,348 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 252 of 252 statements. [2025-03-17 01:07:20,348 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 01:07:20,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 01:07:20,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-17 01:07:20,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 01:07:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 893 proven. 105 refuted. 0 times theorem prover too weak. 2446 trivial. 0 not checked. [2025-03-17 01:07:21,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 01:07:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 18 proven. 105 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2025-03-17 01:07:21,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511911462] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 01:07:21,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 01:07:21,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 21 [2025-03-17 01:07:21,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920545331] [2025-03-17 01:07:21,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 01:07:21,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 01:07:21,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 01:07:21,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 01:07:21,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2025-03-17 01:07:21,742 INFO L87 Difference]: Start difference. First operand 168 states and 271 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 21 states have internal predecessors, (131), 5 states have call successors, (126), 3 states have call predecessors, (126), 6 states have return successors, (126), 5 states have call predecessors, (126), 5 states have call successors, (126) [2025-03-17 01:07:26,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 01:07:26,130 INFO L93 Difference]: Finished difference Result 1258 states and 1942 transitions. [2025-03-17 01:07:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2025-03-17 01:07:26,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 21 states have internal predecessors, (131), 5 states have call successors, (126), 3 states have call predecessors, (126), 6 states have return successors, (126), 5 states have call predecessors, (126), 5 states have call successors, (126) Word has length 252 [2025-03-17 01:07:26,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 01:07:26,144 INFO L225 Difference]: With dead ends: 1258 [2025-03-17 01:07:26,144 INFO L226 Difference]: Without dead ends: 1161 [2025-03-17 01:07:26,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4380 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2439, Invalid=9117, Unknown=0, NotChecked=0, Total=11556 [2025-03-17 01:07:26,149 INFO L435 NwaCegarLoop]: 364 mSDtfsCounter, 1095 mSDsluCounter, 1770 mSDsCounter, 0 mSdLazyCounter, 4146 mSolverCounterSat, 1174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 5320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1174 IncrementalHoareTripleChecker+Valid, 4146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2025-03-17 01:07:26,149 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 2134 Invalid, 5320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1174 Valid, 4146 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2025-03-17 01:07:26,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2025-03-17 01:07:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 574. [2025-03-17 01:07:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 329 states have (on average 1.3829787234042554) internal successors, (455), 333 states have internal predecessors, (455), 229 states have call successors, (229), 15 states have call predecessors, (229), 15 states have return successors, (229), 225 states have call predecessors, (229), 229 states have call successors, (229) [2025-03-17 01:07:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 913 transitions. [2025-03-17 01:07:26,255 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 913 transitions. Word has length 252 [2025-03-17 01:07:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 01:07:26,256 INFO L471 AbstractCegarLoop]: Abstraction has 574 states and 913 transitions. [2025-03-17 01:07:26,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 21 states have internal predecessors, (131), 5 states have call successors, (126), 3 states have call predecessors, (126), 6 states have return successors, (126), 5 states have call predecessors, (126), 5 states have call successors, (126) [2025-03-17 01:07:26,256 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 913 transitions. [2025-03-17 01:07:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2025-03-17 01:07:26,259 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 01:07:26,259 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 01:07:26,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 01:07:26,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-17 01:07:26,460 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 01:07:26,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 01:07:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash 298962877, now seen corresponding path program 1 times [2025-03-17 01:07:26,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 01:07:26,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079244328] [2025-03-17 01:07:26,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 01:07:26,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 01:07:26,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 252 statements into 1 equivalence classes. [2025-03-17 01:07:26,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 252 of 252 statements. [2025-03-17 01:07:26,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 01:07:26,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-17 01:07:26,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968920341] [2025-03-17 01:07:26,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 01:07:26,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 01:07:26,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 01:07:26,631 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 01:07:26,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 01:07:26,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 252 statements into 1 equivalence classes. [2025-03-17 01:07:26,758 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 252 of 252 statements. [2025-03-17 01:07:26,758 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 01:07:26,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 01:07:26,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 01:07:26,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 01:07:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1163 proven. 24 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2025-03-17 01:07:27,527 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 01:07:35,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 01:07:35,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079244328] [2025-03-17 01:07:35,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-17 01:07:35,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968920341] [2025-03-17 01:07:35,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968920341] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 01:07:35,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-17 01:07:35,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2025-03-17 01:07:35,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274441228] [2025-03-17 01:07:35,258 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-17 01:07:35,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 01:07:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 01:07:35,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 01:07:35,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=115, Unknown=1, NotChecked=0, Total=156 [2025-03-17 01:07:35,260 INFO L87 Difference]: Start difference. First operand 574 states and 913 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2025-03-17 01:07:49,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 01:07:49,619 INFO L93 Difference]: Finished difference Result 1385 states and 2161 transitions. [2025-03-17 01:07:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-17 01:07:49,620 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 252 [2025-03-17 01:07:49,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 01:07:49,628 INFO L225 Difference]: With dead ends: 1385 [2025-03-17 01:07:49,628 INFO L226 Difference]: Without dead ends: 890 [2025-03-17 01:07:49,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=295, Invalid=696, Unknown=1, NotChecked=0, Total=992 [2025-03-17 01:07:49,630 INFO L435 NwaCegarLoop]: 254 mSDtfsCounter, 192 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2025-03-17 01:07:49,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 925 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2025-03-17 01:07:49,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2025-03-17 01:07:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 698. [2025-03-17 01:07:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 404 states have (on average 1.3737623762376239) internal successors, (555), 408 states have internal predecessors, (555), 271 states have call successors, (271), 22 states have call predecessors, (271), 22 states have return successors, (271), 267 states have call predecessors, (271), 271 states have call successors, (271) [2025-03-17 01:07:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1097 transitions. [2025-03-17 01:07:49,723 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1097 transitions. Word has length 252 [2025-03-17 01:07:49,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 01:07:49,723 INFO L471 AbstractCegarLoop]: Abstraction has 698 states and 1097 transitions. [2025-03-17 01:07:49,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2025-03-17 01:07:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1097 transitions. [2025-03-17 01:07:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2025-03-17 01:07:49,725 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 01:07:49,726 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 01:07:49,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 01:07:49,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 01:07:49,926 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 01:07:49,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 01:07:49,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1037717160, now seen corresponding path program 1 times [2025-03-17 01:07:49,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 01:07:49,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813733115] [2025-03-17 01:07:49,930 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 01:07:49,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 01:07:49,944 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 253 statements into 1 equivalence classes. [2025-03-17 01:07:50,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 253 of 253 statements. [2025-03-17 01:07:50,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 01:07:50,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 01:07:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 84 proven. 39 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2025-03-17 01:07:50,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 01:07:50,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813733115] [2025-03-17 01:07:50,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813733115] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 01:07:50,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995339550] [2025-03-17 01:07:50,379 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 01:07:50,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 01:07:50,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 01:07:50,382 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 01:07:50,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 01:07:50,445 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 253 statements into 1 equivalence classes. [2025-03-17 01:07:50,498 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 253 of 253 statements. [2025-03-17 01:07:50,498 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 01:07:50,498 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 01:07:50,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 01:07:50,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 01:07:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1553 proven. 39 refuted. 0 times theorem prover too weak. 1852 trivial. 0 not checked. [2025-03-17 01:07:52,785 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 01:07:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 84 proven. 39 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2025-03-17 01:07:55,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995339550] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 01:07:55,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 01:07:55,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2025-03-17 01:07:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671531149] [2025-03-17 01:07:55,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 01:07:55,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 01:07:55,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 01:07:55,417 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 01:07:55,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-17 01:07:55,417 INFO L87 Difference]: Start difference. First operand 698 states and 1097 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2025-03-17 01:07:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 01:07:57,658 INFO L93 Difference]: Finished difference Result 1371 states and 2126 transitions. [2025-03-17 01:07:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 01:07:57,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) Word has length 253 [2025-03-17 01:07:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 01:07:57,664 INFO L225 Difference]: With dead ends: 1371 [2025-03-17 01:07:57,664 INFO L226 Difference]: Without dead ends: 760 [2025-03-17 01:07:57,667 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 503 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2025-03-17 01:07:57,668 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 130 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2025-03-17 01:07:57,668 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 247 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2025-03-17 01:07:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2025-03-17 01:07:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 722. [2025-03-17 01:07:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 422 states have (on average 1.3222748815165877) internal successors, (558), 426 states have internal predecessors, (558), 271 states have call successors, (271), 28 states have call predecessors, (271), 28 states have return successors, (271), 267 states have call predecessors, (271), 271 states have call successors, (271) [2025-03-17 01:07:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1100 transitions. [2025-03-17 01:07:57,732 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1100 transitions. Word has length 253 [2025-03-17 01:07:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 01:07:57,732 INFO L471 AbstractCegarLoop]: Abstraction has 722 states and 1100 transitions. [2025-03-17 01:07:57,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (56), 2 states have call predecessors, (56), 2 states have call successors, (56) [2025-03-17 01:07:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1100 transitions. [2025-03-17 01:07:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2025-03-17 01:07:57,734 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 01:07:57,734 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 01:07:57,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 01:07:57,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 01:07:57,935 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-17 01:07:57,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 01:07:57,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1925220841, now seen corresponding path program 1 times [2025-03-17 01:07:57,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 01:07:57,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293173700] [2025-03-17 01:07:57,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 01:07:57,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 01:07:57,947 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 253 statements into 1 equivalence classes. [2025-03-17 01:07:58,039 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 253 of 253 statements. [2025-03-17 01:07:58,041 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 01:07:58,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-17 01:07:58,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008543015] [2025-03-17 01:07:58,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 01:07:58,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 01:07:58,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 01:07:58,050 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 01:07:58,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 01:07:58,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 253 statements into 1 equivalence classes. [2025-03-17 01:07:58,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 253 of 253 statements. [2025-03-17 01:07:58,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 01:07:58,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 01:07:58,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-17 01:07:58,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 01:08:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1315 proven. 363 refuted. 0 times theorem prover too weak. 1766 trivial. 0 not checked. [2025-03-17 01:08:23,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 01:08:34,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 01:08:34,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293173700] [2025-03-17 01:08:34,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-17 01:08:34,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008543015] [2025-03-17 01:08:34,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008543015] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 01:08:34,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-03-17 01:08:34,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2025-03-17 01:08:34,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795773467] [2025-03-17 01:08:34,629 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-03-17 01:08:34,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 01:08:34,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 01:08:34,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 01:08:34,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=398, Unknown=1, NotChecked=0, Total=506 [2025-03-17 01:08:34,631 INFO L87 Difference]: Start difference. First operand 722 states and 1100 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 5 states have call successors, (42), 5 states have call predecessors, (42), 7 states have return successors, (42), 4 states have call predecessors, (42), 5 states have call successors, (42) [2025-03-17 01:08:47,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]