./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Fibonacci01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Fibonacci01-1.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b0570f2e0d80d68bc280040cce27f654b3fe7a2c0bad30f9bb811af9ca3d994 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:55:10,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:55:10,072 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:55:10,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:55:10,075 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:55:10,091 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:55:10,092 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:55:10,092 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:55:10,092 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:55:10,092 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:55:10,092 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:55:10,092 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:55:10,093 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:55:10,093 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:55:10,093 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:55:10,093 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:55:10,094 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:55:10,094 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:55:10,094 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:55:10,094 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:55:10,094 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:55:10,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:55:10,094 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:55:10,094 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:55:10,094 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:55:10,094 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:55:10,094 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b0570f2e0d80d68bc280040cce27f654b3fe7a2c0bad30f9bb811af9ca3d994 [2025-02-05 15:55:10,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:55:10,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:55:10,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:55:10,341 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:55:10,342 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:55:10,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci01-1.c [2025-02-05 15:55:11,615 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/176eeeea0/9313deab901d4073ac10bba3960f522f/FLAG9bbd5c15f [2025-02-05 15:55:11,870 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:55:11,871 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci01-1.c [2025-02-05 15:55:11,882 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/176eeeea0/9313deab901d4073ac10bba3960f522f/FLAG9bbd5c15f [2025-02-05 15:55:11,900 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/176eeeea0/9313deab901d4073ac10bba3960f522f [2025-02-05 15:55:11,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:55:11,903 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:55:11,905 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:55:11,905 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:55:11,908 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:55:11,909 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:55:11" (1/1) ... [2025-02-05 15:55:11,909 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7022b5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:11, skipping insertion in model container [2025-02-05 15:55:11,909 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:55:11" (1/1) ... [2025-02-05 15:55:11,921 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:55:12,049 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci01-1.c[804,817] [2025-02-05 15:55:12,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:55:12,064 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:55:12,073 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci01-1.c[804,817] [2025-02-05 15:55:12,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:55:12,086 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:55:12,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12 WrapperNode [2025-02-05 15:55:12,087 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:55:12,088 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:55:12,089 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:55:12,089 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:55:12,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,101 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,110 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2025-02-05 15:55:12,111 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:55:12,111 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:55:12,111 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:55:12,111 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:55:12,116 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,117 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,127 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]. [2025-02-05 15:55:12,128 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,128 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,130 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,130 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,131 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,131 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,132 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:55:12,133 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:55:12,134 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:55:12,134 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:55:12,135 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (1/1) ... [2025-02-05 15:55:12,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:55:12,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:12,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 15:55:12,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 15:55:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-02-05 15:55:12,183 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-02-05 15:55:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:55:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:55:12,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:55:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:55:12,238 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:55:12,240 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:55:12,303 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4;havoc #t~ret5; [2025-02-05 15:55:12,360 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2025-02-05 15:55:12,361 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:55:12,370 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:55:12,370 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:55:12,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:55:12 BoogieIcfgContainer [2025-02-05 15:55:12,370 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:55:12,373 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:55:12,373 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:55:12,377 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:55:12,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:55:11" (1/3) ... [2025-02-05 15:55:12,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1787607c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:55:12, skipping insertion in model container [2025-02-05 15:55:12,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:55:12" (2/3) ... [2025-02-05 15:55:12,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1787607c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:55:12, skipping insertion in model container [2025-02-05 15:55:12,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:55:12" (3/3) ... [2025-02-05 15:55:12,380 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2025-02-05 15:55:12,393 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:55:12,395 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci01-1.c that has 2 procedures, 20 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2025-02-05 15:55:12,438 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:55:12,450 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;@437b3238, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:55:12,451 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:55:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-05 15:55:12,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-05 15:55:12,460 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:12,460 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:12,461 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:12,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:12,466 INFO L85 PathProgramCache]: Analyzing trace with hash 828343037, now seen corresponding path program 1 times [2025-02-05 15:55:12,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:12,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471065564] [2025-02-05 15:55:12,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:55:12,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:12,531 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-05 15:55:12,552 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-05 15:55:12,552 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:12,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:55:12,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:12,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471065564] [2025-02-05 15:55:12,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471065564] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:55:12,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:55:12,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 15:55:12,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903123037] [2025-02-05 15:55:12,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:55:12,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 15:55:12,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:12,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 15:55:12,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:55:12,797 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:55:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:12,911 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2025-02-05 15:55:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:55:12,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2025-02-05 15:55:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:12,918 INFO L225 Difference]: With dead ends: 31 [2025-02-05 15:55:12,918 INFO L226 Difference]: Without dead ends: 21 [2025-02-05 15:55:12,922 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:55:12,926 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:12,927 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 55 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:55:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-02-05 15:55:12,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2025-02-05 15:55:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:55:12,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2025-02-05 15:55:12,964 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2025-02-05 15:55:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:12,964 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2025-02-05 15:55:12,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:55:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2025-02-05 15:55:12,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-05 15:55:12,966 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:12,966 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:12,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-05 15:55:12,967 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:12,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:12,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1856819262, now seen corresponding path program 1 times [2025-02-05 15:55:12,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:12,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252263023] [2025-02-05 15:55:12,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:55:12,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:12,975 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-05 15:55:12,984 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-05 15:55:12,985 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:12,985 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-05 15:55:13,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:13,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252263023] [2025-02-05 15:55:13,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252263023] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:55:13,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:55:13,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-05 15:55:13,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191623872] [2025-02-05 15:55:13,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:55:13,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 15:55:13,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:13,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 15:55:13,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:55:13,125 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:55:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:13,211 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2025-02-05 15:55:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:55:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2025-02-05 15:55:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:13,212 INFO L225 Difference]: With dead ends: 25 [2025-02-05 15:55:13,212 INFO L226 Difference]: Without dead ends: 21 [2025-02-05 15:55:13,212 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:55:13,213 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:13,213 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:55:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-02-05 15:55:13,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2025-02-05 15:55:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:55:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2025-02-05 15:55:13,216 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2025-02-05 15:55:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:13,217 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2025-02-05 15:55:13,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-02-05 15:55:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2025-02-05 15:55:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-05 15:55:13,218 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:13,218 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:13,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 15:55:13,219 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:13,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:13,219 INFO L85 PathProgramCache]: Analyzing trace with hash 87542200, now seen corresponding path program 1 times [2025-02-05 15:55:13,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:13,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167219485] [2025-02-05 15:55:13,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:55:13,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:13,225 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:55:13,232 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:55:13,232 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:13,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:55:13,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167219485] [2025-02-05 15:55:13,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167219485] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477007701] [2025-02-05 15:55:13,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:55:13,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:13,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:13,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:13,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 15:55:13,360 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-05 15:55:13,375 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-05 15:55:13,375 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:13,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:13,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-05 15:55:13,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-05 15:55:13,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 15:55:14,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477007701] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:14,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:14,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 11] total 20 [2025-02-05 15:55:14,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230727506] [2025-02-05 15:55:14,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:14,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-05 15:55:14,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:14,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-05 15:55:14,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2025-02-05 15:55:14,039 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2025-02-05 15:55:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:14,214 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2025-02-05 15:55:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:55:14,215 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 24 [2025-02-05 15:55:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:14,216 INFO L225 Difference]: With dead ends: 36 [2025-02-05 15:55:14,216 INFO L226 Difference]: Without dead ends: 21 [2025-02-05 15:55:14,217 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2025-02-05 15:55:14,217 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:14,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 134 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:55:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-02-05 15:55:14,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-02-05 15:55:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-05 15:55:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2025-02-05 15:55:14,223 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 24 [2025-02-05 15:55:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:14,223 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2025-02-05 15:55:14,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2025-02-05 15:55:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2025-02-05 15:55:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-05 15:55:14,224 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:14,224 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:14,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:55:14,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:14,430 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:14,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash -944726963, now seen corresponding path program 1 times [2025-02-05 15:55:14,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:14,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291266766] [2025-02-05 15:55:14,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:55:14,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:14,434 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-05 15:55:14,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 15:55:14,439 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:14,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 15:55:14,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291266766] [2025-02-05 15:55:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291266766] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430850893] [2025-02-05 15:55:14,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:55:14,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:14,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:14,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:14,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 15:55:14,650 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-05 15:55:14,658 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-05 15:55:14,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:55:14,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:14,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-02-05 15:55:14,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-02-05 15:55:14,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-05 15:55:15,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430850893] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:15,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:15,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 21 [2025-02-05 15:55:15,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392419703] [2025-02-05 15:55:15,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:15,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 15:55:15,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:15,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 15:55:15,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:55:15,068 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2025-02-05 15:55:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:15,251 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2025-02-05 15:55:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:55:15,251 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 25 [2025-02-05 15:55:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:15,252 INFO L225 Difference]: With dead ends: 32 [2025-02-05 15:55:15,252 INFO L226 Difference]: Without dead ends: 28 [2025-02-05 15:55:15,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2025-02-05 15:55:15,253 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:15,253 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 81 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:55:15,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-02-05 15:55:15,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2025-02-05 15:55:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-05 15:55:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2025-02-05 15:55:15,263 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 25 [2025-02-05 15:55:15,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:15,263 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2025-02-05 15:55:15,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2025-02-05 15:55:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2025-02-05 15:55:15,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-05 15:55:15,264 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:15,264 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:15,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 15:55:15,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:15,465 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:15,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:15,466 INFO L85 PathProgramCache]: Analyzing trace with hash 16031016, now seen corresponding path program 2 times [2025-02-05 15:55:15,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:15,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119833069] [2025-02-05 15:55:15,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:55:15,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:15,471 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-05 15:55:15,477 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 15:55:15,477 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:55:15,477 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 15:55:15,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:15,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119833069] [2025-02-05 15:55:15,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119833069] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:15,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671095224] [2025-02-05 15:55:15,622 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:55:15,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:15,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:15,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:15,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 15:55:15,663 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 38 statements into 2 equivalence classes. [2025-02-05 15:55:15,677 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 38 of 38 statements. [2025-02-05 15:55:15,677 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:55:15,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:15,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-05 15:55:15,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 15:55:15,760 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-05 15:55:16,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671095224] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:16,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:16,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 15 [2025-02-05 15:55:16,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182704815] [2025-02-05 15:55:16,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:16,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-05 15:55:16,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:16,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-05 15:55:16,004 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:55:16,004 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2025-02-05 15:55:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:16,102 INFO L93 Difference]: Finished difference Result 53 states and 77 transitions. [2025-02-05 15:55:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-05 15:55:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 38 [2025-02-05 15:55:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:16,105 INFO L225 Difference]: With dead ends: 53 [2025-02-05 15:55:16,105 INFO L226 Difference]: Without dead ends: 31 [2025-02-05 15:55:16,106 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2025-02-05 15:55:16,106 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:16,107 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 89 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:55:16,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-05 15:55:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2025-02-05 15:55:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-05 15:55:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2025-02-05 15:55:16,119 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 38 [2025-02-05 15:55:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:16,119 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2025-02-05 15:55:16,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 6 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2025-02-05 15:55:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2025-02-05 15:55:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 15:55:16,120 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:16,120 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:16,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-05 15:55:16,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:16,324 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:16,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:16,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1088857853, now seen corresponding path program 3 times [2025-02-05 15:55:16,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:16,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870581535] [2025-02-05 15:55:16,325 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:55:16,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:16,329 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 5 equivalence classes. [2025-02-05 15:55:16,333 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 39 statements. [2025-02-05 15:55:16,334 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:55:16,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-05 15:55:16,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:16,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870581535] [2025-02-05 15:55:16,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870581535] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:16,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585411964] [2025-02-05 15:55:16,559 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:55:16,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:16,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:16,562 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:16,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 15:55:16,588 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 5 equivalence classes. [2025-02-05 15:55:16,601 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 31 of 39 statements. [2025-02-05 15:55:16,601 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:55:16,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:16,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-05 15:55:16,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 15:55:16,847 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 15:55:17,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585411964] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:17,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:17,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 29 [2025-02-05 15:55:17,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909475427] [2025-02-05 15:55:17,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:17,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-05 15:55:17,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:17,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-05 15:55:17,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2025-02-05 15:55:17,376 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (9), 1 states have call predecessors, (9), 8 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2025-02-05 15:55:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:17,713 INFO L93 Difference]: Finished difference Result 45 states and 65 transitions. [2025-02-05 15:55:17,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-05 15:55:17,714 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (9), 1 states have call predecessors, (9), 8 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) Word has length 39 [2025-02-05 15:55:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:17,715 INFO L225 Difference]: With dead ends: 45 [2025-02-05 15:55:17,715 INFO L226 Difference]: Without dead ends: 41 [2025-02-05 15:55:17,716 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 15:55:17,717 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:17,717 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 156 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:55:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-05 15:55:17,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2025-02-05 15:55:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2025-02-05 15:55:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2025-02-05 15:55:17,729 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 39 [2025-02-05 15:55:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:17,730 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2025-02-05 15:55:17,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (9), 1 states have call predecessors, (9), 8 states have return successors, (13), 13 states have call predecessors, (13), 8 states have call successors, (13) [2025-02-05 15:55:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2025-02-05 15:55:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2025-02-05 15:55:17,731 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:17,731 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:17,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 15:55:17,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-02-05 15:55:17,935 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:17,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:17,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1921640697, now seen corresponding path program 4 times [2025-02-05 15:55:17,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:17,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381890533] [2025-02-05 15:55:17,935 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:55:17,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:17,941 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-02-05 15:55:17,944 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 43 of 53 statements. [2025-02-05 15:55:17,945 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:55:17,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-05 15:55:18,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:18,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381890533] [2025-02-05 15:55:18,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381890533] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:18,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376120234] [2025-02-05 15:55:18,002 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:55:18,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:18,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:18,005 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:18,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 15:55:18,033 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 53 statements into 2 equivalence classes. [2025-02-05 15:55:18,041 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 43 of 53 statements. [2025-02-05 15:55:18,042 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:55:18,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:18,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-05 15:55:18,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-05 15:55:18,078 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-02-05 15:55:18,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376120234] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:18,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:18,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2025-02-05 15:55:18,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753216567] [2025-02-05 15:55:18,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:18,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 15:55:18,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:18,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 15:55:18,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:55:18,281 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2025-02-05 15:55:18,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:18,391 INFO L93 Difference]: Finished difference Result 61 states and 89 transitions. [2025-02-05 15:55:18,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-05 15:55:18,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2025-02-05 15:55:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:18,393 INFO L225 Difference]: With dead ends: 61 [2025-02-05 15:55:18,394 INFO L226 Difference]: Without dead ends: 33 [2025-02-05 15:55:18,395 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2025-02-05 15:55:18,396 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:18,397 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 46 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:55:18,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-02-05 15:55:18,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2025-02-05 15:55:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 15:55:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2025-02-05 15:55:18,401 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 53 [2025-02-05 15:55:18,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:18,401 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2025-02-05 15:55:18,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2025-02-05 15:55:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2025-02-05 15:55:18,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-02-05 15:55:18,404 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:18,404 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:18,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 15:55:18,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:18,605 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:18,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:18,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1457957336, now seen corresponding path program 5 times [2025-02-05 15:55:18,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:18,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645583871] [2025-02-05 15:55:18,606 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:55:18,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:18,612 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 52 statements into 6 equivalence classes. [2025-02-05 15:55:18,616 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 52 statements. [2025-02-05 15:55:18,616 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-05 15:55:18,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2025-02-05 15:55:18,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645583871] [2025-02-05 15:55:18,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645583871] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329078791] [2025-02-05 15:55:18,714 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-05 15:55:18,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:18,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:18,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:18,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 15:55:18,741 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 52 statements into 6 equivalence classes. [2025-02-05 15:55:18,748 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 31 of 52 statements. [2025-02-05 15:55:18,748 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-05 15:55:18,748 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:18,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 15:55:18,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 15:55:18,806 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 41 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-02-05 15:55:19,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329078791] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:19,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:19,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 17 [2025-02-05 15:55:19,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518236856] [2025-02-05 15:55:19,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:19,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-05 15:55:19,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:19,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-05 15:55:19,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:55:19,090 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 7 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) [2025-02-05 15:55:19,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:19,218 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2025-02-05 15:55:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 15:55:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 7 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) Word has length 52 [2025-02-05 15:55:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:19,221 INFO L225 Difference]: With dead ends: 62 [2025-02-05 15:55:19,221 INFO L226 Difference]: Without dead ends: 38 [2025-02-05 15:55:19,222 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2025-02-05 15:55:19,222 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:19,222 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 62 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:55:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2025-02-05 15:55:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2025-02-05 15:55:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2025-02-05 15:55:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2025-02-05 15:55:19,233 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 52 [2025-02-05 15:55:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:19,233 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2025-02-05 15:55:19,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 7 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (11), 5 states have call predecessors, (11), 7 states have call successors, (11) [2025-02-05 15:55:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2025-02-05 15:55:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-02-05 15:55:19,234 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:55:19,234 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:55:19,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 15:55:19,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 15:55:19,435 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:55:19,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:55:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1228403338, now seen corresponding path program 6 times [2025-02-05 15:55:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:55:19,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434013627] [2025-02-05 15:55:19,436 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:55:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:55:19,442 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 94 statements into 12 equivalence classes. [2025-02-05 15:55:19,463 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 86 of 94 statements. [2025-02-05 15:55:19,463 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-02-05 15:55:19,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 61 proven. 178 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2025-02-05 15:55:20,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:55:20,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434013627] [2025-02-05 15:55:20,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434013627] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:55:20,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78065365] [2025-02-05 15:55:20,045 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-05 15:55:20,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:20,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:55:20,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:55:20,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 15:55:20,087 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 94 statements into 12 equivalence classes. [2025-02-05 15:55:20,137 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) and asserted 86 of 94 statements. [2025-02-05 15:55:20,137 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2025-02-05 15:55:20,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:55:20,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-02-05 15:55:20,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:55:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 146 proven. 67 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2025-02-05 15:55:20,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:55:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 110 proven. 112 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2025-02-05 15:55:22,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78065365] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:55:22,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:55:22,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 20] total 42 [2025-02-05 15:55:22,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782287967] [2025-02-05 15:55:22,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:55:22,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2025-02-05 15:55:22,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:55:22,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2025-02-05 15:55:22,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2025-02-05 15:55:22,346 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 27 states have internal predecessors, (62), 10 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (21), 21 states have call predecessors, (21), 10 states have call successors, (21) [2025-02-05 15:55:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:55:22,763 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2025-02-05 15:55:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-05 15:55:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 27 states have internal predecessors, (62), 10 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (21), 21 states have call predecessors, (21), 10 states have call successors, (21) Word has length 94 [2025-02-05 15:55:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:55:22,764 INFO L225 Difference]: With dead ends: 52 [2025-02-05 15:55:22,764 INFO L226 Difference]: Without dead ends: 0 [2025-02-05 15:55:22,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 164 SyntacticMatches, 14 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=422, Invalid=2770, Unknown=0, NotChecked=0, Total=3192 [2025-02-05 15:55:22,766 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 52 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:55:22,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 213 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:55:22,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-05 15:55:22,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-05 15:55:22,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-05 15:55:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-05 15:55:22,766 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 94 [2025-02-05 15:55:22,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:55:22,767 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-05 15:55:22,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 27 states have internal predecessors, (62), 10 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (21), 21 states have call predecessors, (21), 10 states have call successors, (21) [2025-02-05 15:55:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-05 15:55:22,767 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-05 15:55:22,769 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-05 15:55:22,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 15:55:22,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:55:22,976 INFO L422 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2025-02-05 15:55:22,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-02-05 15:55:23,225 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-05 15:55:23,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.02 03:55:23 BoogieIcfgContainer [2025-02-05 15:55:23,229 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-05 15:55:23,229 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-05 15:55:23,229 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-05 15:55:23,229 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-05 15:55:23,230 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:55:12" (3/4) ... [2025-02-05 15:55:23,236 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-05 15:55:23,241 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure fibonacci [2025-02-05 15:55:23,243 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2025-02-05 15:55:23,245 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-05 15:55:23,245 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-05 15:55:23,245 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-05 15:55:23,305 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-05 15:55:23,306 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-05 15:55:23,306 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-05 15:55:23,307 INFO L158 Benchmark]: Toolchain (without parser) took 11403.29ms. Allocated memory was 142.6MB in the beginning and 310.4MB in the end (delta: 167.8MB). Free memory was 106.9MB in the beginning and 118.7MB in the end (delta: -11.8MB). Peak memory consumption was 152.7MB. Max. memory is 16.1GB. [2025-02-05 15:55:23,307 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 201.3MB. Free memory is still 115.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:55:23,308 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.16ms. Allocated memory is still 142.6MB. Free memory was 105.9MB in the beginning and 96.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-05 15:55:23,308 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.44ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 94.3MB in the end (delta: 944.8kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:55:23,308 INFO L158 Benchmark]: Boogie Preprocessor took 21.44ms. Allocated memory is still 142.6MB. Free memory was 94.3MB in the beginning and 93.5MB in the end (delta: 823.4kB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-05 15:55:23,309 INFO L158 Benchmark]: IcfgBuilder took 236.77ms. Allocated memory is still 142.6MB. Free memory was 93.5MB in the beginning and 83.2MB in the end (delta: 10.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-02-05 15:55:23,309 INFO L158 Benchmark]: TraceAbstraction took 10855.82ms. Allocated memory was 142.6MB in the beginning and 310.4MB in the end (delta: 167.8MB). Free memory was 82.3MB in the beginning and 126.7MB in the end (delta: -44.5MB). Peak memory consumption was 119.1MB. Max. memory is 16.1GB. [2025-02-05 15:55:23,310 INFO L158 Benchmark]: Witness Printer took 76.70ms. Allocated memory is still 310.4MB. Free memory was 126.7MB in the beginning and 118.7MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-05 15:55:23,311 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 201.3MB. Free memory is still 115.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 183.16ms. Allocated memory is still 142.6MB. Free memory was 105.9MB in the beginning and 96.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.44ms. Allocated memory is still 142.6MB. Free memory was 95.3MB in the beginning and 94.3MB in the end (delta: 944.8kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.44ms. Allocated memory is still 142.6MB. Free memory was 94.3MB in the beginning and 93.5MB in the end (delta: 823.4kB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 236.77ms. Allocated memory is still 142.6MB. Free memory was 93.5MB in the beginning and 83.2MB in the end (delta: 10.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 10855.82ms. Allocated memory was 142.6MB in the beginning and 310.4MB in the end (delta: 167.8MB). Free memory was 82.3MB in the beginning and 126.7MB in the end (delta: -44.5MB). Peak memory consumption was 119.1MB. Max. memory is 16.1GB. * Witness Printer took 76.70ms. Allocated memory is still 310.4MB. Free memory was 126.7MB in the beginning and 118.7MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 36]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.6s, OverallIterations: 9, TraceHistogramMax: 13, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 210 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 191 mSDsluCounter, 889 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 756 mSDsCounter, 203 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1493 IncrementalHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 203 mSolverCounterUnsat, 133 mSDtfsCounter, 1493 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 796 GetRequests, 564 SyntacticMatches, 35 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=8, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 22 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 673 NumberOfCodeBlocks, 579 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 975 ConstructedInterpolants, 0 QuantifiedInterpolants, 2628 SizeOfPredicates, 10 NumberOfNonLiveVariables, 710 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 1601/2298 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-02-05 15:55:23,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE