./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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-pr-co_file-11.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 8ae218ca02b5417943c2f14caa583f12c89b5725c70ee83be125986bc0e82f29 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 12:34:34,862 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 12:34:34,914 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 12:34:34,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 12:34:34,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 12:34:34,938 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 12:34:34,941 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 12:34:34,941 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 12:34:34,941 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 12:34:34,941 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 12:34:34,942 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 12:34:34,942 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 12:34:34,942 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 12:34:34,943 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 12:34:34,943 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 12:34:34,943 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 12:34:34,943 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 12:34:34,943 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 12:34:34,944 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 12:34:34,944 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 12:34:34,944 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 12:34:34,944 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 12:34:34,944 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 12:34:34,944 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 12:34:34,944 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 12:34:34,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 12:34:34,944 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 12:34:34,944 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 12:34:34,944 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 12:34:34,944 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 12:34:34,945 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 12:34:34,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 12:34:34,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 12:34:34,945 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 12:34:34,945 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 12:34:34,945 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 12:34:34,945 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 12:34:34,945 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 12:34:34,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 12:34:34,946 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 12:34:34,946 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 12:34:34,946 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 12:34:34,946 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 12:34:34,946 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 -> 8ae218ca02b5417943c2f14caa583f12c89b5725c70ee83be125986bc0e82f29 [2025-03-08 12:34:35,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 12:34:35,223 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 12:34:35,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 12:34:35,227 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 12:34:35,227 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 12:34:35,229 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-11.i [2025-03-08 12:34:36,415 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b99ad8b2/6788f6dc07084277bae32f42caa27d50/FLAG056506ae4 [2025-03-08 12:34:36,666 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 12:34:36,667 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-11.i [2025-03-08 12:34:36,675 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b99ad8b2/6788f6dc07084277bae32f42caa27d50/FLAG056506ae4 [2025-03-08 12:34:36,991 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b99ad8b2/6788f6dc07084277bae32f42caa27d50 [2025-03-08 12:34:36,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 12:34:36,994 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 12:34:36,995 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 12:34:36,995 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 12:34:36,998 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 12:34:36,999 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:34:36" (1/1) ... [2025-03-08 12:34:36,999 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53da7ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:36, skipping insertion in model container [2025-03-08 12:34:36,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 12:34:36" (1/1) ... [2025-03-08 12:34:37,013 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 12:34:37,124 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-pr-co_file-11.i[919,932] [2025-03-08 12:34:37,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 12:34:37,189 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 12:34:37,196 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-pr-co_file-11.i[919,932] [2025-03-08 12:34:37,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 12:34:37,250 INFO L204 MainTranslator]: Completed translation [2025-03-08 12:34:37,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37 WrapperNode [2025-03-08 12:34:37,251 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 12:34:37,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 12:34:37,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 12:34:37,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 12:34:37,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,266 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,301 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 219 [2025-03-08 12:34:37,301 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 12:34:37,302 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 12:34:37,302 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 12:34:37,302 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 12:34:37,309 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,314 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,329 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]. [2025-03-08 12:34:37,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,341 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,350 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,352 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 12:34:37,353 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 12:34:37,353 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 12:34:37,353 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 12:34:37,353 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (1/1) ... [2025-03-08 12:34:37,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 12:34:37,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 12:34:37,377 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) [2025-03-08 12:34:37,382 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 [2025-03-08 12:34:37,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 12:34:37,397 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-03-08 12:34:37,397 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-03-08 12:34:37,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 12:34:37,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 12:34:37,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 12:34:37,461 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 12:34:37,462 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 12:34:37,737 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2025-03-08 12:34:37,738 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 12:34:37,752 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 12:34:37,754 INFO L336 CfgBuilder]: Removed 2 assume(true) statements. [2025-03-08 12:34:37,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:34:37 BoogieIcfgContainer [2025-03-08 12:34:37,754 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 12:34:37,756 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 12:34:37,757 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 12:34:37,760 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 12:34:37,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 12:34:36" (1/3) ... [2025-03-08 12:34:37,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679995c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:34:37, skipping insertion in model container [2025-03-08 12:34:37,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 12:34:37" (2/3) ... [2025-03-08 12:34:37,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@679995c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 12:34:37, skipping insertion in model container [2025-03-08 12:34:37,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 12:34:37" (3/3) ... [2025-03-08 12:34:37,762 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pr-co_file-11.i [2025-03-08 12:34:37,772 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 12:34:37,775 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_fillercode_fillercodestructure_filler-pr-co_file-11.i that has 2 procedures, 92 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-03-08 12:34:37,818 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 12:34:37,828 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;@146c07d8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 12:34:37,828 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-03-08 12:34:37,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 63 states have internal predecessors, (92), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2025-03-08 12:34:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2025-03-08 12:34:37,842 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 12:34:37,843 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 12:34:37,843 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 12:34:37,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 12:34:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1587419270, now seen corresponding path program 1 times [2025-03-08 12:34:37,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 12:34:37,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808850975] [2025-03-08 12:34:37,854 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 12:34:37,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 12:34:37,927 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 173 statements into 1 equivalence classes. [2025-03-08 12:34:37,949 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 173 of 173 statements. [2025-03-08 12:34:37,949 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 12:34:37,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 12:34:38,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2025-03-08 12:34:38,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 12:34:38,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808850975] [2025-03-08 12:34:38,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808850975] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 12:34:38,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683539435] [2025-03-08 12:34:38,099 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 12:34:38,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 12:34:38,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 12:34:38,113 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) [2025-03-08 12:34:38,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 12:34:38,191 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 173 statements into 1 equivalence classes. [2025-03-08 12:34:38,259 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 173 of 173 statements. [2025-03-08 12:34:38,260 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 12:34:38,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 12:34:38,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-03-08 12:34:38,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 12:34:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2025-03-08 12:34:38,303 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 12:34:38,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683539435] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 12:34:38,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 12:34:38,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-03-08 12:34:38,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978546961] [2025-03-08 12:34:38,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 12:34:38,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 12:34:38,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 12:34:38,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 12:34:38,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 12:34:38,328 INFO L87 Difference]: Start difference. First operand has 92 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 63 states have internal predecessors, (92), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 2 states have call successors, (27) [2025-03-08 12:34:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 12:34:38,353 INFO L93 Difference]: Finished difference Result 178 states and 314 transitions. [2025-03-08 12:34:38,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 12:34:38,355 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 2 states have call successors, (27) Word has length 173 [2025-03-08 12:34:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 12:34:38,359 INFO L225 Difference]: With dead ends: 178 [2025-03-08 12:34:38,359 INFO L226 Difference]: Without dead ends: 89 [2025-03-08 12:34:38,361 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 12:34:38,363 INFO L435 NwaCegarLoop]: 137 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 12:34:38,363 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 12:34:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-08 12:34:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2025-03-08 12:34:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2025-03-08 12:34:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 140 transitions. [2025-03-08 12:34:38,399 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 140 transitions. Word has length 173 [2025-03-08 12:34:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 12:34:38,399 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 140 transitions. [2025-03-08 12:34:38,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 2 states have call successors, (27) [2025-03-08 12:34:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 140 transitions. [2025-03-08 12:34:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2025-03-08 12:34:38,403 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 12:34:38,404 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 12:34:38,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 12:34:38,608 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 [2025-03-08 12:34:38,608 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 12:34:38,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 12:34:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1013522583, now seen corresponding path program 1 times [2025-03-08 12:34:38,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 12:34:38,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580536264] [2025-03-08 12:34:38,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 12:34:38,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 12:34:38,623 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 173 statements into 1 equivalence classes. [2025-03-08 12:34:38,704 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 173 of 173 statements. [2025-03-08 12:34:38,704 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 12:34:38,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 12:34:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2025-03-08 12:34:39,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 12:34:39,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580536264] [2025-03-08 12:34:39,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580536264] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 12:34:39,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 12:34:39,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 12:34:39,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721253695] [2025-03-08 12:34:39,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 12:34:39,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 12:34:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 12:34:39,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 12:34:39,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-08 12:34:39,483 INFO L87 Difference]: Start difference. First operand 89 states and 140 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2025-03-08 12:34:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 12:34:39,563 INFO L93 Difference]: Finished difference Result 203 states and 320 transitions. [2025-03-08 12:34:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 12:34:39,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 173 [2025-03-08 12:34:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 12:34:39,568 INFO L225 Difference]: With dead ends: 203 [2025-03-08 12:34:39,568 INFO L226 Difference]: Without dead ends: 117 [2025-03-08 12:34:39,569 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2025-03-08 12:34:39,569 INFO L435 NwaCegarLoop]: 130 mSDtfsCounter, 122 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 12:34:39,571 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 284 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 12:34:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-03-08 12:34:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2025-03-08 12:34:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 74 states have (on average 1.4594594594594594) internal successors, (108), 74 states have internal predecessors, (108), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2025-03-08 12:34:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 162 transitions. [2025-03-08 12:34:39,586 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 162 transitions. Word has length 173 [2025-03-08 12:34:39,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 12:34:39,588 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 162 transitions. [2025-03-08 12:34:39,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2025-03-08 12:34:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 162 transitions. [2025-03-08 12:34:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2025-03-08 12:34:39,591 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 12:34:39,591 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 12:34:39,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 12:34:39,592 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 12:34:39,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 12:34:39,592 INFO L85 PathProgramCache]: Analyzing trace with hash -793931880, now seen corresponding path program 1 times [2025-03-08 12:34:39,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 12:34:39,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656983478] [2025-03-08 12:34:39,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 12:34:39,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 12:34:39,609 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 173 statements into 1 equivalence classes. [2025-03-08 12:34:39,662 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 173 of 173 statements. [2025-03-08 12:34:39,664 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 12:34:39,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 12:34:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2025-03-08 12:34:39,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 12:34:39,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656983478] [2025-03-08 12:34:39,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656983478] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 12:34:39,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 12:34:39,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 12:34:39,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536910721] [2025-03-08 12:34:39,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 12:34:39,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 12:34:39,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 12:34:39,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 12:34:39,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-08 12:34:39,901 INFO L87 Difference]: Start difference. First operand 103 states and 162 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2025-03-08 12:34:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 12:34:40,167 INFO L93 Difference]: Finished difference Result 304 states and 481 transitions. [2025-03-08 12:34:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 12:34:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 173 [2025-03-08 12:34:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 12:34:40,171 INFO L225 Difference]: With dead ends: 304 [2025-03-08 12:34:40,172 INFO L226 Difference]: Without dead ends: 204 [2025-03-08 12:34:40,173 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2025-03-08 12:34:40,173 INFO L435 NwaCegarLoop]: 133 mSDtfsCounter, 102 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 12:34:40,174 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 459 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 12:34:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2025-03-08 12:34:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2025-03-08 12:34:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.3578947368421053) internal successors, (129), 95 states have internal predecessors, (129), 54 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2025-03-08 12:34:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 237 transitions. [2025-03-08 12:34:40,199 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 237 transitions. Word has length 173 [2025-03-08 12:34:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 12:34:40,199 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 237 transitions. [2025-03-08 12:34:40,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2025-03-08 12:34:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 237 transitions. [2025-03-08 12:34:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2025-03-08 12:34:40,204 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 12:34:40,205 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 12:34:40,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 12:34:40,205 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 12:34:40,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 12:34:40,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1471341513, now seen corresponding path program 1 times [2025-03-08 12:34:40,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 12:34:40,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607698768] [2025-03-08 12:34:40,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 12:34:40,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 12:34:40,221 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 174 statements into 1 equivalence classes. [2025-03-08 12:34:40,321 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 174 of 174 statements. [2025-03-08 12:34:40,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 12:34:40,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 12:34:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2025-03-08 12:34:40,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 12:34:40,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607698768] [2025-03-08 12:34:40,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607698768] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 12:34:40,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 12:34:40,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 12:34:40,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20333649] [2025-03-08 12:34:40,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 12:34:40,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 12:34:40,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 12:34:40,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 12:34:40,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 12:34:40,659 INFO L87 Difference]: Start difference. First operand 152 states and 237 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2025-03-08 12:34:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 12:34:40,953 INFO L93 Difference]: Finished difference Result 420 states and 661 transitions. [2025-03-08 12:34:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 12:34:40,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2025-03-08 12:34:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 12:34:40,956 INFO L225 Difference]: With dead ends: 420 [2025-03-08 12:34:40,956 INFO L226 Difference]: Without dead ends: 320 [2025-03-08 12:34:40,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2025-03-08 12:34:40,957 INFO L435 NwaCegarLoop]: 137 mSDtfsCounter, 152 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 12:34:40,958 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 383 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 12:34:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2025-03-08 12:34:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 257. [2025-03-08 12:34:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 172 states have (on average 1.4244186046511629) internal successors, (245), 172 states have internal predecessors, (245), 81 states have call successors, (81), 3 states have call predecessors, (81), 3 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2025-03-08 12:34:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 407 transitions. [2025-03-08 12:34:40,983 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 407 transitions. Word has length 174 [2025-03-08 12:34:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 12:34:40,984 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 407 transitions. [2025-03-08 12:34:40,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2025-03-08 12:34:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 407 transitions. [2025-03-08 12:34:40,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2025-03-08 12:34:40,985 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 12:34:40,986 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 12:34:40,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 12:34:40,986 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 12:34:40,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 12:34:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash 162486535, now seen corresponding path program 1 times [2025-03-08 12:34:40,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 12:34:40,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741628831] [2025-03-08 12:34:40,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 12:34:40,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 12:34:40,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 175 statements into 1 equivalence classes. [2025-03-08 12:34:41,053 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 175 of 175 statements. [2025-03-08 12:34:41,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 12:34:41,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 12:34:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 9 proven. 69 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2025-03-08 12:34:41,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 12:34:41,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741628831] [2025-03-08 12:34:41,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741628831] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 12:34:41,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334467082] [2025-03-08 12:34:41,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 12:34:41,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 12:34:41,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 12:34:41,352 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) [2025-03-08 12:34:41,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 12:34:41,405 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 175 statements into 1 equivalence classes. [2025-03-08 12:34:41,454 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 175 of 175 statements. [2025-03-08 12:34:41,454 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 12:34:41,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 12:34:41,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-08 12:34:41,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 12:34:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 308 proven. 69 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2025-03-08 12:34:41,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 12:34:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 9 proven. 69 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2025-03-08 12:34:42,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334467082] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 12:34:42,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 12:34:42,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 13 [2025-03-08 12:34:42,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239940463] [2025-03-08 12:34:42,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 12:34:42,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-08 12:34:42,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 12:34:42,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-08 12:34:42,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-03-08 12:34:42,360 INFO L87 Difference]: Start difference. First operand 257 states and 407 transitions. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 5 states have call successors, (77), 3 states have call predecessors, (77), 6 states have return successors, (78), 5 states have call predecessors, (78), 5 states have call successors, (78) [2025-03-08 12:34:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 12:34:42,581 INFO L93 Difference]: Finished difference Result 455 states and 708 transitions. [2025-03-08 12:34:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 12:34:42,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 5 states have call successors, (77), 3 states have call predecessors, (77), 6 states have return successors, (78), 5 states have call predecessors, (78), 5 states have call successors, (78) Word has length 175 [2025-03-08 12:34:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 12:34:42,584 INFO L225 Difference]: With dead ends: 455 [2025-03-08 12:34:42,584 INFO L226 Difference]: Without dead ends: 250 [2025-03-08 12:34:42,585 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2025-03-08 12:34:42,585 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 287 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 12:34:42,586 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 305 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 12:34:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2025-03-08 12:34:42,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2025-03-08 12:34:42,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 150 states have (on average 1.3066666666666666) internal successors, (196), 150 states have internal predecessors, (196), 81 states have call successors, (81), 6 states have call predecessors, (81), 6 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2025-03-08 12:34:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 358 transitions. [2025-03-08 12:34:42,621 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 358 transitions. Word has length 175 [2025-03-08 12:34:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 12:34:42,621 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 358 transitions. [2025-03-08 12:34:42,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 5 states have call successors, (77), 3 states have call predecessors, (77), 6 states have return successors, (78), 5 states have call predecessors, (78), 5 states have call successors, (78) [2025-03-08 12:34:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 358 transitions. [2025-03-08 12:34:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2025-03-08 12:34:42,623 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 12:34:42,624 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 12:34:42,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-08 12:34:42,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 12:34:42,825 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 12:34:42,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 12:34:42,825 INFO L85 PathProgramCache]: Analyzing trace with hash -872892555, now seen corresponding path program 1 times [2025-03-08 12:34:42,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 12:34:42,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083612830] [2025-03-08 12:34:42,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 12:34:42,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 12:34:42,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 175 statements into 1 equivalence classes. [2025-03-08 12:34:42,924 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 175 of 175 statements. [2025-03-08 12:34:42,925 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 12:34:42,925 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 12:34:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 33 proven. 45 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2025-03-08 12:34:46,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 12:34:46,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083612830] [2025-03-08 12:34:46,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083612830] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 12:34:46,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665754587] [2025-03-08 12:34:46,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 12:34:46,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 12:34:46,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 12:34:46,724 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) [2025-03-08 12:34:46,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 12:34:46,776 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 175 statements into 1 equivalence classes. [2025-03-08 12:34:46,855 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 175 of 175 statements. [2025-03-08 12:34:46,856 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 12:34:46,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 12:34:46,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 57 conjuncts are in the unsatisfiable core [2025-03-08 12:34:46,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 12:34:50,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 591 proven. 288 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2025-03-08 12:34:50,292 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 12:35:33,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665754587] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 12:35:33,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 12:35:33,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28] total 41 [2025-03-08 12:35:33,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290547514] [2025-03-08 12:35:33,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 12:35:33,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-08 12:35:33,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 12:35:33,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-08 12:35:33,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2025-03-08 12:35:33,958 INFO L87 Difference]: Start difference. First operand 238 states and 358 transitions. Second operand has 41 states, 40 states have (on average 2.625) internal successors, (105), 38 states have internal predecessors, (105), 11 states have call successors, (54), 8 states have call predecessors, (54), 10 states have return successors, (54), 11 states have call predecessors, (54), 11 states have call successors, (54) [2025-03-08 12:35:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 12:35:56,903 INFO L93 Difference]: Finished difference Result 1284 states and 1800 transitions. [2025-03-08 12:35:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2025-03-08 12:35:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.625) internal successors, (105), 38 states have internal predecessors, (105), 11 states have call successors, (54), 8 states have call predecessors, (54), 10 states have return successors, (54), 11 states have call predecessors, (54), 11 states have call successors, (54) Word has length 175 [2025-03-08 12:35:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 12:35:56,910 INFO L225 Difference]: With dead ends: 1284 [2025-03-08 12:35:56,910 INFO L226 Difference]: Without dead ends: 1102 [2025-03-08 12:35:56,917 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8744 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=4132, Invalid=22928, Unknown=0, NotChecked=0, Total=27060 [2025-03-08 12:35:56,919 INFO L435 NwaCegarLoop]: 155 mSDtfsCounter, 2438 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 2873 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 2873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2025-03-08 12:35:56,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2440 Valid, 1548 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 2873 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2025-03-08 12:35:56,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2025-03-08 12:35:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 435. [2025-03-08 12:35:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 294 states have (on average 1.2653061224489797) internal successors, (372), 296 states have internal predecessors, (372), 114 states have call successors, (114), 26 states have call predecessors, (114), 26 states have return successors, (114), 112 states have call predecessors, (114), 114 states have call successors, (114) [2025-03-08 12:35:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 600 transitions. [2025-03-08 12:35:57,001 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 600 transitions. Word has length 175 [2025-03-08 12:35:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 12:35:57,001 INFO L471 AbstractCegarLoop]: Abstraction has 435 states and 600 transitions. [2025-03-08 12:35:57,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.625) internal successors, (105), 38 states have internal predecessors, (105), 11 states have call successors, (54), 8 states have call predecessors, (54), 10 states have return successors, (54), 11 states have call predecessors, (54), 11 states have call successors, (54) [2025-03-08 12:35:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 600 transitions. [2025-03-08 12:35:57,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2025-03-08 12:35:57,004 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 12:35:57,004 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 12:35:57,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 12:35:57,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 12:35:57,205 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 12:35:57,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 12:35:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1594564950, now seen corresponding path program 1 times [2025-03-08 12:35:57,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 12:35:57,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840757264] [2025-03-08 12:35:57,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 12:35:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 12:35:57,215 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 176 statements into 1 equivalence classes. [2025-03-08 12:35:57,281 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 176 of 176 statements. [2025-03-08 12:35:57,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 12:35:57,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 12:36:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2025-03-08 12:36:01,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 12:36:01,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840757264] [2025-03-08 12:36:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840757264] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 12:36:01,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 12:36:01,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-03-08 12:36:01,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784721813] [2025-03-08 12:36:01,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 12:36:01,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-08 12:36:01,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 12:36:01,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-08 12:36:01,446 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2025-03-08 12:36:01,446 INFO L87 Difference]: Start difference. First operand 435 states and 600 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2025-03-08 12:36:07,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 12:36:07,675 INFO L93 Difference]: Finished difference Result 823 states and 1126 transitions. [2025-03-08 12:36:07,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 12:36:07,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 176 [2025-03-08 12:36:07,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 12:36:07,680 INFO L225 Difference]: With dead ends: 823 [2025-03-08 12:36:07,684 INFO L226 Difference]: Without dead ends: 717 [2025-03-08 12:36:07,685 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2025-03-08 12:36:07,685 INFO L435 NwaCegarLoop]: 144 mSDtfsCounter, 804 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2025-03-08 12:36:07,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 578 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2025-03-08 12:36:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2025-03-08 12:36:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 417. [2025-03-08 12:36:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 294 states have (on average 1.2789115646258504) internal successors, (376), 296 states have internal predecessors, (376), 95 states have call successors, (95), 27 states have call predecessors, (95), 27 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2025-03-08 12:36:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 566 transitions. [2025-03-08 12:36:07,767 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 566 transitions. Word has length 176 [2025-03-08 12:36:07,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 12:36:07,768 INFO L471 AbstractCegarLoop]: Abstraction has 417 states and 566 transitions. [2025-03-08 12:36:07,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 5 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2025-03-08 12:36:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 566 transitions. [2025-03-08 12:36:07,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2025-03-08 12:36:07,769 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 12:36:07,769 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 12:36:07,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 12:36:07,769 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-03-08 12:36:07,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 12:36:07,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1534535049, now seen corresponding path program 1 times [2025-03-08 12:36:07,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 12:36:07,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670612469] [2025-03-08 12:36:07,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 12:36:07,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 12:36:07,782 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 176 statements into 1 equivalence classes. [2025-03-08 12:36:07,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 176 of 176 statements. [2025-03-08 12:36:07,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 12:36:07,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat