./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/nested5-2.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 5ad780effdbe313ff13ad5bc7233d50356fbf06f53a57c18cd85a4aa46126eb2 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:21:49,449 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:21:49,487 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:21:49,491 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:21:49,491 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:21:49,504 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:21:49,505 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:21:49,505 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:21:49,505 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:21:49,505 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:21:49,505 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:21:49,505 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:21:49,506 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:21:49,506 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:21:49,506 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:21:49,506 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:21:49,506 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:21:49,506 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:21:49,506 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:21:49,506 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:21:49,506 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:21:49,507 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:21:49,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:21:49,507 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:21:49,507 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:21:49,507 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:21:49,507 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:21:49,507 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:21:49,507 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:21:49,507 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:21:49,507 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:21:49,508 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:21:49,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:21:49,508 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:21:49,508 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:21:49,508 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:21:49,508 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:21:49,508 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:21:49,508 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:21:49,508 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:21:49,508 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:21:49,508 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:21:49,509 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:21:49,509 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 -> 5ad780effdbe313ff13ad5bc7233d50356fbf06f53a57c18cd85a4aa46126eb2 [2025-02-07 20:21:49,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:21:49,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:21:49,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:21:49,700 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:21:49,701 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:21:49,701 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested5-2.c [2025-02-07 20:21:50,910 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2d1e8257a/69688d82e4364ea0a72f8029ec1e57dc/FLAGcad40df28 [2025-02-07 20:21:51,117 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:21:51,118 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested5-2.c [2025-02-07 20:21:51,134 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2d1e8257a/69688d82e4364ea0a72f8029ec1e57dc/FLAGcad40df28 [2025-02-07 20:21:51,484 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2d1e8257a/69688d82e4364ea0a72f8029ec1e57dc [2025-02-07 20:21:51,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:21:51,487 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:21:51,488 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:21:51,488 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:21:51,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:21:51,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d795288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51, skipping insertion in model container [2025-02-07 20:21:51,492 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,500 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:21:51,573 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/loops-crafted-1/nested5-2.c[321,334] [2025-02-07 20:21:51,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:21:51,593 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:21:51,601 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/loops-crafted-1/nested5-2.c[321,334] [2025-02-07 20:21:51,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:21:51,613 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:21:51,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51 WrapperNode [2025-02-07 20:21:51,614 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:21:51,615 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:21:51,615 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:21:51,615 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:21:51,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,624 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,633 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2025-02-07 20:21:51,634 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:21:51,634 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:21:51,634 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:21:51,634 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:21:51,638 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,639 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,644 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]. [2025-02-07 20:21:51,644 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,646 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,646 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,647 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,648 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:21:51,648 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:21:51,648 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:21:51,649 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:21:51,649 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (1/1) ... [2025-02-07 20:21:51,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:21:51,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:21:51,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 20:21:51,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 20:21:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:21:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:21:51,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:21:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:21:51,723 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:21:51,725 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:21:51,815 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L25: havoc __VERIFIER_assert_~cond#1;havoc __VERIFIER_assert_#in~cond#1;assume { :end_inline___VERIFIER_assert } true;main_#t~post5#1 := main_~z~0#1;main_~z~0#1 := 1 + main_#t~post5#1;havoc main_#t~post5#1; [2025-02-07 20:21:51,825 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2025-02-07 20:21:51,825 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:21:51,833 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:21:51,835 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:21:51,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:21:51 BoogieIcfgContainer [2025-02-07 20:21:51,835 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:21:51,838 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:21:51,838 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:21:51,841 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:21:51,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:21:51" (1/3) ... [2025-02-07 20:21:51,842 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7399d26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:21:51, skipping insertion in model container [2025-02-07 20:21:51,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:21:51" (2/3) ... [2025-02-07 20:21:51,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7399d26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:21:51, skipping insertion in model container [2025-02-07 20:21:51,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:21:51" (3/3) ... [2025-02-07 20:21:51,845 INFO L128 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2025-02-07 20:21:51,857 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:21:51,859 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG nested5-2.c that has 1 procedures, 12 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-02-07 20:21:51,897 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:21:51,907 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;@7e0d2eb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:21:51,907 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:21:51,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 20:21:51,915 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:21:51,915 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:21:51,915 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:21:51,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:21:51,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1148541692, now seen corresponding path program 1 times [2025-02-07 20:21:51,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:21:51,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306748512] [2025-02-07 20:21:51,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:21:51,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:21:51,975 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 20:21:52,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:21:52,003 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:21:52,003 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:21:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:52,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:21:52,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306748512] [2025-02-07 20:21:52,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306748512] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:21:52,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:21:52,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 20:21:52,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957726928] [2025-02-07 20:21:52,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:21:52,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 20:21:52,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:21:52,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 20:21:52,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 20:21:52,123 INFO L87 Difference]: Start difference. First operand has 12 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 11 states have internal predecessors, (16), 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:52,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:21:52,140 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2025-02-07 20:21:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 20:21:52,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 8 [2025-02-07 20:21:52,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:21:52,146 INFO L225 Difference]: With dead ends: 17 [2025-02-07 20:21:52,147 INFO L226 Difference]: Without dead ends: 10 [2025-02-07 20:21:52,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 20:21:52,150 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:21:52,152 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:21:52,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2025-02-07 20:21:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2025-02-07 20:21:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2025-02-07 20:21:52,171 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2025-02-07 20:21:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:21:52,174 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2025-02-07 20:21:52,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2025-02-07 20:21:52,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-07 20:21:52,175 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:21:52,175 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:21:52,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 20:21:52,175 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:21:52,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:21:52,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1245085835, now seen corresponding path program 1 times [2025-02-07 20:21:52,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:21:52,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454768671] [2025-02-07 20:21:52,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:21:52,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:21:52,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 20:21:52,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 20:21:52,200 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:21:52,201 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:21:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:52,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:21:52,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454768671] [2025-02-07 20:21:52,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454768671] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:21:52,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650027481] [2025-02-07 20:21:52,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:21:52,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:21:52,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:21:52,340 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:21:52,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 20:21:52,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-07 20:21:52,391 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-07 20:21:52,391 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:21:52,391 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:21:52,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-07 20:21:52,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:21:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:52,422 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:21:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:52,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650027481] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:21:52,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:21:52,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-07 20:21:52,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053862968] [2025-02-07 20:21:52,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:21:52,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-07 20:21:52,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:21:52,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-07 20:21:52,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2025-02-07 20:21:52,461 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:21:52,499 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2025-02-07 20:21:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:21:52,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) Word has length 9 [2025-02-07 20:21:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:21:52,501 INFO L225 Difference]: With dead ends: 16 [2025-02-07 20:21:52,501 INFO L226 Difference]: Without dead ends: 13 [2025-02-07 20:21:52,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:21:52,502 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:21:52,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:21:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-02-07 20:21:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2025-02-07 20:21:52,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:52,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2025-02-07 20:21:52,506 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2025-02-07 20:21:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:21:52,506 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2025-02-07 20:21:52,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:52,506 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2025-02-07 20:21:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-02-07 20:21:52,506 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:21:52,506 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:21:52,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-07 20:21:52,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:21:52,707 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:21:52,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:21:52,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1046070972, now seen corresponding path program 2 times [2025-02-07 20:21:52,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:21:52,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871983503] [2025-02-07 20:21:52,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:21:52,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:21:52,717 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-07 20:21:52,737 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-07 20:21:52,741 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:21:52,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:21:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:52,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:21:52,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871983503] [2025-02-07 20:21:52,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871983503] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:21:52,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392632004] [2025-02-07 20:21:52,940 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:21:52,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:21:52,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:21:52,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:21:52,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 20:21:52,965 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-07 20:21:52,975 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-07 20:21:52,975 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:21:52,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:21:52,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:21:52,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:21:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:52,993 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:21:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:53,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392632004] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:21:53,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:21:53,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2025-02-07 20:21:53,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111518423] [2025-02-07 20:21:53,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:21:53,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-07 20:21:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:21:53,071 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-07 20:21:53,071 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2025-02-07 20:21:53,071 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:21:53,193 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2025-02-07 20:21:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 20:21:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) Word has length 12 [2025-02-07 20:21:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:21:53,193 INFO L225 Difference]: With dead ends: 22 [2025-02-07 20:21:53,193 INFO L226 Difference]: Without dead ends: 19 [2025-02-07 20:21:53,194 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2025-02-07 20:21:53,194 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:21:53,194 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:21:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2025-02-07 20:21:53,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2025-02-07 20:21:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-02-07 20:21:53,197 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2025-02-07 20:21:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:21:53,197 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-02-07 20:21:53,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-02-07 20:21:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-02-07 20:21:53,198 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:21:53,198 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:21:53,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 20:21:53,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:21:53,402 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:21:53,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:21:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash -177789860, now seen corresponding path program 3 times [2025-02-07 20:21:53,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:21:53,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253383643] [2025-02-07 20:21:53,403 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:21:53,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:21:53,408 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 6 equivalence classes. [2025-02-07 20:21:53,426 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:21:53,427 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:21:53,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:21:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:53,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:21:53,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253383643] [2025-02-07 20:21:53,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253383643] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:21:53,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982924659] [2025-02-07 20:21:53,573 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:21:53,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:21:53,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:21:53,578 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:21:53,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 20:21:53,601 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 6 equivalence classes. [2025-02-07 20:21:53,616 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 18 of 18 statements. [2025-02-07 20:21:53,616 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:21:53,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:21:53,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-07 20:21:53,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:21:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:53,666 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:21:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:53,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982924659] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:21:53,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:21:53,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-02-07 20:21:53,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965853697] [2025-02-07 20:21:53,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:21:53,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-07 20:21:53,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:21:53,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-07 20:21:53,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2025-02-07 20:21:53,912 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:56,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:21:56,126 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2025-02-07 20:21:56,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 20:21:56,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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) Word has length 18 [2025-02-07 20:21:56,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:21:56,127 INFO L225 Difference]: With dead ends: 34 [2025-02-07 20:21:56,127 INFO L226 Difference]: Without dead ends: 31 [2025-02-07 20:21:56,128 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2025-02-07 20:21:56,128 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:21:56,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:21:56,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-07 20:21:56,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2025-02-07 20:21:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2025-02-07 20:21:56,133 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2025-02-07 20:21:56,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:21:56,133 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2025-02-07 20:21:56,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:21:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2025-02-07 20:21:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 20:21:56,134 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:21:56,134 INFO L218 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:21:56,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 20:21:56,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:21:56,338 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:21:56,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:21:56,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1491974044, now seen corresponding path program 4 times [2025-02-07 20:21:56,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:21:56,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912943186] [2025-02-07 20:21:56,338 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:21:56,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:21:56,343 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-07 20:21:56,371 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 20:21:56,371 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:21:56,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:21:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:56,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:21:56,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912943186] [2025-02-07 20:21:56,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912943186] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:21:56,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12467497] [2025-02-07 20:21:56,796 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:21:56,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:21:56,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:21:56,798 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:21:56,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 20:21:56,821 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 30 statements into 2 equivalence classes. [2025-02-07 20:21:56,841 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-02-07 20:21:56,841 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:21:56,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:21:56,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-07 20:21:56,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:21:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:56,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:21:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:21:57,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12467497] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:21:57,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:21:57,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2025-02-07 20:21:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039886040] [2025-02-07 20:21:57,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:21:57,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2025-02-07 20:21:57,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:21:57,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2025-02-07 20:21:57,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2025-02-07 20:21:57,825 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:23:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:08,452 INFO L93 Difference]: Finished difference Result 58 states and 84 transitions. [2025-02-07 20:23:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-07 20:23:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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) Word has length 30 [2025-02-07 20:23:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:08,457 INFO L225 Difference]: With dead ends: 58 [2025-02-07 20:23:08,457 INFO L226 Difference]: Without dead ends: 55 [2025-02-07 20:23:08,459 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 71.4s TimeCoverageRelationStatistics Valid=1748, Invalid=3222, Unknown=0, NotChecked=0, Total=4970 [2025-02-07 20:23:08,460 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:08,461 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 227 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:23:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-02-07 20:23:08,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2025-02-07 20:23:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:23:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2025-02-07 20:23:08,467 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 30 [2025-02-07 20:23:08,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:08,467 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2025-02-07 20:23:08,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:23:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2025-02-07 20:23:08,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2025-02-07 20:23:08,469 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:08,469 INFO L218 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:23:08,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-07 20:23:08,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:08,670 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:08,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:08,671 INFO L85 PathProgramCache]: Analyzing trace with hash -87933412, now seen corresponding path program 5 times [2025-02-07 20:23:08,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:08,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833939645] [2025-02-07 20:23:08,671 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:23:08,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:08,677 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 24 equivalence classes. [2025-02-07 20:23:08,719 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 20:23:08,719 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-02-07 20:23:08,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:23:09,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:09,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833939645] [2025-02-07 20:23:09,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833939645] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:09,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241487290] [2025-02-07 20:23:09,934 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:23:09,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:09,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:09,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:23:09,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 20:23:09,974 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 54 statements into 24 equivalence classes. [2025-02-07 20:23:10,523 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 54 of 54 statements. [2025-02-07 20:23:10,523 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-02-07 20:23:10,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:10,530 WARN L254 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 95 conjuncts are in the unsatisfiable core [2025-02-07 20:23:10,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:23:10,627 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:23:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:23:13,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241487290] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:23:13,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:23:13,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2025-02-07 20:23:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794308203] [2025-02-07 20:23:13,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:23:13,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2025-02-07 20:23:13,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:13,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2025-02-07 20:23:13,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2494, Invalid=6818, Unknown=0, NotChecked=0, Total=9312 [2025-02-07 20:23:13,376 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:23:31,558 WARN L286 SmtUtils]: Spent 17.14s on a formula simplification. DAG size of input: 190 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)