./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i --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/hardness-nfm22/hardness_operatoramount_amount250_file-55.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5208e97c947824349dcc8cb32160d4052cba683a795fae400d45ff0b27a23a25 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 02:19:07,552 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 02:19:07,617 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 02:19:07,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 02:19:07,624 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 02:19:07,645 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 02:19:07,646 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 02:19:07,646 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 02:19:07,647 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 02:19:07,647 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 02:19:07,647 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 02:19:07,647 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 02:19:07,648 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 02:19:07,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 02:19:07,648 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 02:19:07,648 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 02:19:07,648 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 02:19:07,648 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 02:19:07,649 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 02:19:07,649 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 02:19:07,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 02:19:07,649 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 02:19:07,649 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 02:19:07,649 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 02:19:07,650 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 02:19:07,650 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 02:19:07,650 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 02:19:07,651 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 02:19:07,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 02:19:07,651 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 -> 5208e97c947824349dcc8cb32160d4052cba683a795fae400d45ff0b27a23a25 [2025-02-06 02:19:07,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 02:19:07,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 02:19:07,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 02:19:07,887 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 02:19:07,887 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 02:19:07,888 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i [2025-02-06 02:19:09,053 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9d4dab6a9/13bacaee201845639f333f92ee5c3ae3/FLAG5cc31b0ee [2025-02-06 02:19:09,487 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 02:19:09,494 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i [2025-02-06 02:19:09,512 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9d4dab6a9/13bacaee201845639f333f92ee5c3ae3/FLAG5cc31b0ee [2025-02-06 02:19:09,641 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/9d4dab6a9/13bacaee201845639f333f92ee5c3ae3 [2025-02-06 02:19:09,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 02:19:09,644 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 02:19:09,648 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 02:19:09,648 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 02:19:09,650 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 02:19:09,655 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 02:19:09" (1/1) ... [2025-02-06 02:19:09,656 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@398c1f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:09, skipping insertion in model container [2025-02-06 02:19:09,657 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 02:19:09" (1/1) ... [2025-02-06 02:19:09,697 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 02:19:09,887 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i[916,929] [2025-02-06 02:19:10,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 02:19:10,025 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 02:19:10,036 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-55.i[916,929] [2025-02-06 02:19:10,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 02:19:10,111 INFO L204 MainTranslator]: Completed translation [2025-02-06 02:19:10,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10 WrapperNode [2025-02-06 02:19:10,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 02:19:10,112 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 02:19:10,113 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 02:19:10,113 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 02:19:10,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,131 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,166 INFO L138 Inliner]: procedures = 26, calls = 74, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 484 [2025-02-06 02:19:10,166 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 02:19:10,167 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 02:19:10,168 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 02:19:10,168 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 02:19:10,173 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,185 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,224 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]. [2025-02-06 02:19:10,224 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,224 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,247 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,255 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,259 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,263 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,271 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 02:19:10,272 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 02:19:10,273 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 02:19:10,273 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 02:19:10,274 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (1/1) ... [2025-02-06 02:19:10,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 02:19:10,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 02:19:10,299 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) [2025-02-06 02:19:10,307 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 [2025-02-06 02:19:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 02:19:10,324 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-06 02:19:10,324 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-06 02:19:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 02:19:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 02:19:10,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 02:19:10,398 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 02:19:10,400 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 02:19:10,922 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L413: havoc property_#t~bitwise43#1;havoc property_#t~short44#1;havoc property_#t~ite48#1;havoc property_#t~ite47#1;havoc property_#t~bitwise45#1;havoc property_#t~bitwise46#1;havoc property_#t~short49#1; [2025-02-06 02:19:11,015 INFO L? ?]: Removed 38 outVars from TransFormulas that were not future-live. [2025-02-06 02:19:11,018 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 02:19:11,046 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 02:19:11,046 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 02:19:11,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 02:19:11 BoogieIcfgContainer [2025-02-06 02:19:11,046 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 02:19:11,048 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 02:19:11,048 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 02:19:11,055 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 02:19:11,058 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 02:19:09" (1/3) ... [2025-02-06 02:19:11,059 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c10eceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 02:19:11, skipping insertion in model container [2025-02-06 02:19:11,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:19:10" (2/3) ... [2025-02-06 02:19:11,059 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c10eceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 02:19:11, skipping insertion in model container [2025-02-06 02:19:11,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 02:19:11" (3/3) ... [2025-02-06 02:19:11,060 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-55.i [2025-02-06 02:19:11,077 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 02:19:11,083 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_operatoramount_amount250_file-55.i that has 2 procedures, 195 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-06 02:19:11,121 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 02:19:11,131 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;@4427cb29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 02:19:11,131 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-06 02:19:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 131 states have (on average 1.465648854961832) internal successors, (192), 132 states have internal predecessors, (192), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-02-06 02:19:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2025-02-06 02:19:11,150 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 02:19:11,151 INFO L218 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 02:19:11,151 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 02:19:11,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 02:19:11,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1658804254, now seen corresponding path program 1 times [2025-02-06 02:19:11,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 02:19:11,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933012187] [2025-02-06 02:19:11,160 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:11,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 02:19:11,321 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 388 statements into 1 equivalence classes. [2025-02-06 02:19:11,356 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 388 of 388 statements. [2025-02-06 02:19:11,356 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:11,356 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:19:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2025-02-06 02:19:11,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 02:19:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933012187] [2025-02-06 02:19:11,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933012187] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 02:19:11,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124724355] [2025-02-06 02:19:11,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:11,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 02:19:11,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 02:19:11,623 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) [2025-02-06 02:19:11,624 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 [2025-02-06 02:19:11,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 388 statements into 1 equivalence classes. [2025-02-06 02:19:11,843 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 388 of 388 statements. [2025-02-06 02:19:11,843 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:11,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:19:11,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-06 02:19:11,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 02:19:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2025-02-06 02:19:11,895 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 02:19:11,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124724355] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 02:19:11,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 02:19:11,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-06 02:19:11,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711169411] [2025-02-06 02:19:11,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 02:19:11,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-06 02:19:11,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 02:19:11,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-06 02:19:11,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 02:19:11,917 INFO L87 Difference]: Start difference. First operand has 195 states, 131 states have (on average 1.465648854961832) internal successors, (192), 132 states have internal predecessors, (192), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Second operand has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2025-02-06 02:19:11,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 02:19:11,967 INFO L93 Difference]: Finished difference Result 383 states and 682 transitions. [2025-02-06 02:19:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-06 02:19:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) Word has length 388 [2025-02-06 02:19:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 02:19:11,974 INFO L225 Difference]: With dead ends: 383 [2025-02-06 02:19:11,974 INFO L226 Difference]: Without dead ends: 191 [2025-02-06 02:19:11,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-06 02:19:11,982 INFO L435 NwaCegarLoop]: 299 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 02:19:11,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 299 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 02:19:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2025-02-06 02:19:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2025-02-06 02:19:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 128 states have (on average 1.4296875) internal successors, (183), 128 states have internal predecessors, (183), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-02-06 02:19:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 305 transitions. [2025-02-06 02:19:12,022 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 305 transitions. Word has length 388 [2025-02-06 02:19:12,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 02:19:12,022 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 305 transitions. [2025-02-06 02:19:12,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2025-02-06 02:19:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 305 transitions. [2025-02-06 02:19:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2025-02-06 02:19:12,034 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 02:19:12,035 INFO L218 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 02:19:12,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 02:19:12,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-06 02:19:12,236 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 02:19:12,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 02:19:12,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1759079806, now seen corresponding path program 1 times [2025-02-06 02:19:12,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 02:19:12,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197891613] [2025-02-06 02:19:12,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:12,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 02:19:12,271 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 388 statements into 1 equivalence classes. [2025-02-06 02:19:12,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 388 of 388 statements. [2025-02-06 02:19:12,370 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:12,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:19:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2025-02-06 02:19:12,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 02:19:12,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197891613] [2025-02-06 02:19:12,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197891613] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 02:19:12,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 02:19:12,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 02:19:12,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122137866] [2025-02-06 02:19:12,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 02:19:12,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 02:19:12,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 02:19:12,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 02:19:12,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 02:19:12,595 INFO L87 Difference]: Start difference. First operand 191 states and 305 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2025-02-06 02:19:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 02:19:12,738 INFO L93 Difference]: Finished difference Result 559 states and 894 transitions. [2025-02-06 02:19:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 02:19:12,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 388 [2025-02-06 02:19:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 02:19:12,747 INFO L225 Difference]: With dead ends: 559 [2025-02-06 02:19:12,747 INFO L226 Difference]: Without dead ends: 371 [2025-02-06 02:19:12,749 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 [2025-02-06 02:19:12,751 INFO L435 NwaCegarLoop]: 506 mSDtfsCounter, 271 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 02:19:12,751 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 766 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 02:19:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2025-02-06 02:19:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 224. [2025-02-06 02:19:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 161 states have (on average 1.4161490683229814) internal successors, (228), 161 states have internal predecessors, (228), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-02-06 02:19:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 350 transitions. [2025-02-06 02:19:12,786 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 350 transitions. Word has length 388 [2025-02-06 02:19:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 02:19:12,789 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 350 transitions. [2025-02-06 02:19:12,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2025-02-06 02:19:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 350 transitions. [2025-02-06 02:19:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2025-02-06 02:19:12,794 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 02:19:12,795 INFO L218 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 02:19:12,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 02:19:12,795 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 02:19:12,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 02:19:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash 560606116, now seen corresponding path program 1 times [2025-02-06 02:19:12,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 02:19:12,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443121428] [2025-02-06 02:19:12,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:12,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 02:19:12,845 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 388 statements into 1 equivalence classes. [2025-02-06 02:19:12,933 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 388 of 388 statements. [2025-02-06 02:19:12,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:12,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:19:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2025-02-06 02:19:13,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 02:19:13,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443121428] [2025-02-06 02:19:13,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443121428] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 02:19:13,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 02:19:13,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-02-06 02:19:13,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086889546] [2025-02-06 02:19:13,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 02:19:13,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 02:19:13,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 02:19:13,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 02:19:13,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 02:19:13,348 INFO L87 Difference]: Start difference. First operand 224 states and 350 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2025-02-06 02:19:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 02:19:13,673 INFO L93 Difference]: Finished difference Result 756 states and 1178 transitions. [2025-02-06 02:19:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 02:19:13,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) Word has length 388 [2025-02-06 02:19:13,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 02:19:13,677 INFO L225 Difference]: With dead ends: 756 [2025-02-06 02:19:13,677 INFO L226 Difference]: Without dead ends: 535 [2025-02-06 02:19:13,678 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2025-02-06 02:19:13,679 INFO L435 NwaCegarLoop]: 377 mSDtfsCounter, 345 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 02:19:13,679 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1597 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 02:19:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2025-02-06 02:19:13,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 443. [2025-02-06 02:19:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 318 states have (on average 1.4182389937106918) internal successors, (451), 318 states have internal predecessors, (451), 122 states have call successors, (122), 2 states have call predecessors, (122), 2 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2025-02-06 02:19:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 695 transitions. [2025-02-06 02:19:13,720 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 695 transitions. Word has length 388 [2025-02-06 02:19:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 02:19:13,721 INFO L471 AbstractCegarLoop]: Abstraction has 443 states and 695 transitions. [2025-02-06 02:19:13,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2025-02-06 02:19:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 695 transitions. [2025-02-06 02:19:13,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2025-02-06 02:19:13,725 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 02:19:13,725 INFO L218 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 02:19:13,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 02:19:13,726 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 02:19:13,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 02:19:13,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1414751670, now seen corresponding path program 1 times [2025-02-06 02:19:13,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 02:19:13,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335007151] [2025-02-06 02:19:13,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:13,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 02:19:13,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 389 statements into 1 equivalence classes. [2025-02-06 02:19:14,119 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 389 of 389 statements. [2025-02-06 02:19:14,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:14,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:19:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2025-02-06 02:19:14,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 02:19:14,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335007151] [2025-02-06 02:19:14,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335007151] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 02:19:14,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716310163] [2025-02-06 02:19:14,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:14,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 02:19:14,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 02:19:14,863 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) [2025-02-06 02:19:14,864 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 [2025-02-06 02:19:14,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 389 statements into 1 equivalence classes. [2025-02-06 02:19:15,075 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 389 of 389 statements. [2025-02-06 02:19:15,075 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:15,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:19:15,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 02:19:15,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 02:19:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 858 proven. 9 refuted. 0 times theorem prover too weak. 6453 trivial. 0 not checked. [2025-02-06 02:19:15,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 02:19:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 171 proven. 9 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2025-02-06 02:19:15,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716310163] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 02:19:15,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 02:19:15,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2025-02-06 02:19:15,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264252260] [2025-02-06 02:19:15,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 02:19:15,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-06 02:19:15,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 02:19:15,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-06 02:19:15,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-02-06 02:19:15,723 INFO L87 Difference]: Start difference. First operand 443 states and 695 transitions. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2025-02-06 02:19:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 02:19:16,485 INFO L93 Difference]: Finished difference Result 952 states and 1480 transitions. [2025-02-06 02:19:16,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 02:19:16,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) Word has length 389 [2025-02-06 02:19:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 02:19:16,494 INFO L225 Difference]: With dead ends: 952 [2025-02-06 02:19:16,495 INFO L226 Difference]: Without dead ends: 512 [2025-02-06 02:19:16,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 774 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2025-02-06 02:19:16,496 INFO L435 NwaCegarLoop]: 336 mSDtfsCounter, 703 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-06 02:19:16,498 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 983 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-06 02:19:16,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2025-02-06 02:19:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 485. [2025-02-06 02:19:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 295 states have (on average 1.2813559322033898) internal successors, (378), 296 states have internal predecessors, (378), 183 states have call successors, (183), 6 states have call predecessors, (183), 6 states have return successors, (183), 182 states have call predecessors, (183), 183 states have call successors, (183) [2025-02-06 02:19:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 744 transitions. [2025-02-06 02:19:16,571 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 744 transitions. Word has length 389 [2025-02-06 02:19:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 02:19:16,572 INFO L471 AbstractCegarLoop]: Abstraction has 485 states and 744 transitions. [2025-02-06 02:19:16,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (65), 2 states have call predecessors, (65), 2 states have call successors, (65) [2025-02-06 02:19:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 744 transitions. [2025-02-06 02:19:16,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2025-02-06 02:19:16,576 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 02:19:16,577 INFO L218 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 02:19:16,585 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 [2025-02-06 02:19:16,777 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 [2025-02-06 02:19:16,778 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 02:19:16,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 02:19:16,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1357604680, now seen corresponding path program 1 times [2025-02-06 02:19:16,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 02:19:16,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977271059] [2025-02-06 02:19:16,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:16,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 02:19:16,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 390 statements into 1 equivalence classes. [2025-02-06 02:19:17,259 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 390 of 390 statements. [2025-02-06 02:19:17,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:17,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:19:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 84 proven. 438 refuted. 0 times theorem prover too weak. 6798 trivial. 0 not checked. [2025-02-06 02:19:20,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 02:19:20,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977271059] [2025-02-06 02:19:20,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977271059] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 02:19:20,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091489788] [2025-02-06 02:19:20,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:20,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 02:19:20,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 02:19:20,278 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) [2025-02-06 02:19:20,281 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 [2025-02-06 02:19:20,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 390 statements into 1 equivalence classes. [2025-02-06 02:19:20,494 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 390 of 390 statements. [2025-02-06 02:19:20,494 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:20,494 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:19:20,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-06 02:19:20,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 02:19:24,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 2079 proven. 576 refuted. 0 times theorem prover too weak. 4665 trivial. 0 not checked. [2025-02-06 02:19:24,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 02:19:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 84 proven. 447 refuted. 0 times theorem prover too weak. 6789 trivial. 0 not checked. [2025-02-06 02:19:27,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091489788] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 02:19:27,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 02:19:27,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 18] total 46 [2025-02-06 02:19:27,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422206344] [2025-02-06 02:19:27,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 02:19:27,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-02-06 02:19:27,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 02:19:27,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-02-06 02:19:27,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1723, Unknown=0, NotChecked=0, Total=2070 [2025-02-06 02:19:27,852 INFO L87 Difference]: Start difference. First operand 485 states and 744 transitions. Second operand has 46 states, 43 states have (on average 6.255813953488372) internal successors, (269), 41 states have internal predecessors, (269), 15 states have call successors, (183), 6 states have call predecessors, (183), 11 states have return successors, (183), 15 states have call predecessors, (183), 15 states have call successors, (183) [2025-02-06 02:19:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 02:19:34,012 INFO L93 Difference]: Finished difference Result 2221 states and 3271 transitions. [2025-02-06 02:19:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2025-02-06 02:19:34,013 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 6.255813953488372) internal successors, (269), 41 states have internal predecessors, (269), 15 states have call successors, (183), 6 states have call predecessors, (183), 11 states have return successors, (183), 15 states have call predecessors, (183), 15 states have call successors, (183) Word has length 390 [2025-02-06 02:19:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 02:19:34,021 INFO L225 Difference]: With dead ends: 2221 [2025-02-06 02:19:34,021 INFO L226 Difference]: Without dead ends: 1845 [2025-02-06 02:19:34,026 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 879 GetRequests, 757 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5119 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2281, Invalid=12971, Unknown=0, NotChecked=0, Total=15252 [2025-02-06 02:19:34,027 INFO L435 NwaCegarLoop]: 205 mSDtfsCounter, 4009 mSDsluCounter, 3724 mSDsCounter, 0 mSdLazyCounter, 4292 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4040 SdHoareTripleChecker+Valid, 3929 SdHoareTripleChecker+Invalid, 5156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 4292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2025-02-06 02:19:34,028 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4040 Valid, 3929 Invalid, 5156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 4292 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2025-02-06 02:19:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2025-02-06 02:19:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 774. [2025-02-06 02:19:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 555 states have (on average 1.3423423423423424) internal successors, (745), 557 states have internal predecessors, (745), 205 states have call successors, (205), 13 states have call predecessors, (205), 13 states have return successors, (205), 203 states have call predecessors, (205), 205 states have call successors, (205) [2025-02-06 02:19:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1155 transitions. [2025-02-06 02:19:34,125 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1155 transitions. Word has length 390 [2025-02-06 02:19:34,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 02:19:34,126 INFO L471 AbstractCegarLoop]: Abstraction has 774 states and 1155 transitions. [2025-02-06 02:19:34,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 6.255813953488372) internal successors, (269), 41 states have internal predecessors, (269), 15 states have call successors, (183), 6 states have call predecessors, (183), 11 states have return successors, (183), 15 states have call predecessors, (183), 15 states have call successors, (183) [2025-02-06 02:19:34,127 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1155 transitions. [2025-02-06 02:19:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2025-02-06 02:19:34,129 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 02:19:34,130 INFO L218 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 02:19:34,138 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 [2025-02-06 02:19:34,332 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 [2025-02-06 02:19:34,332 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 02:19:34,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 02:19:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1726524154, now seen corresponding path program 1 times [2025-02-06 02:19:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 02:19:34,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748264623] [2025-02-06 02:19:34,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:34,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 02:19:34,351 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 391 statements into 1 equivalence classes. [2025-02-06 02:19:34,711 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 391 of 391 statements. [2025-02-06 02:19:34,711 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:34,711 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 02:19:34,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643734752] [2025-02-06 02:19:34,716 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:34,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 02:19:34,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 02:19:34,718 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) [2025-02-06 02:19:34,722 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 [2025-02-06 02:19:34,822 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 391 statements into 1 equivalence classes. [2025-02-06 02:19:34,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 391 of 391 statements. [2025-02-06 02:19:34,993 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:34,993 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:19:34,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 02:19:35,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 02:19:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3458 proven. 123 refuted. 0 times theorem prover too weak. 3739 trivial. 0 not checked. [2025-02-06 02:19:36,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 02:19:36,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 02:19:36,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748264623] [2025-02-06 02:19:36,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 02:19:36,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643734752] [2025-02-06 02:19:36,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643734752] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 02:19:36,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-06 02:19:36,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2025-02-06 02:19:36,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161908298] [2025-02-06 02:19:36,306 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-06 02:19:36,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-06 02:19:36,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 02:19:36,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-06 02:19:36,307 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-02-06 02:19:36,307 INFO L87 Difference]: Start difference. First operand 774 states and 1155 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 3 states have call successors, (61), 3 states have call predecessors, (61), 4 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) [2025-02-06 02:19:37,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 02:19:37,283 INFO L93 Difference]: Finished difference Result 1622 states and 2364 transitions. [2025-02-06 02:19:37,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-06 02:19:37,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 3 states have call successors, (61), 3 states have call predecessors, (61), 4 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) Word has length 391 [2025-02-06 02:19:37,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 02:19:37,301 INFO L225 Difference]: With dead ends: 1622 [2025-02-06 02:19:37,301 INFO L226 Difference]: Without dead ends: 1358 [2025-02-06 02:19:37,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2025-02-06 02:19:37,310 INFO L435 NwaCegarLoop]: 228 mSDtfsCounter, 617 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-02-06 02:19:37,311 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 876 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2025-02-06 02:19:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2025-02-06 02:19:37,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1208. [2025-02-06 02:19:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 973 states have (on average 1.3741007194244603) internal successors, (1337), 979 states have internal predecessors, (1337), 213 states have call successors, (213), 21 states have call predecessors, (213), 21 states have return successors, (213), 207 states have call predecessors, (213), 213 states have call successors, (213) [2025-02-06 02:19:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1763 transitions. [2025-02-06 02:19:37,500 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1763 transitions. Word has length 391 [2025-02-06 02:19:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 02:19:37,505 INFO L471 AbstractCegarLoop]: Abstraction has 1208 states and 1763 transitions. [2025-02-06 02:19:37,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 3 states have call successors, (61), 3 states have call predecessors, (61), 4 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) [2025-02-06 02:19:37,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1763 transitions. [2025-02-06 02:19:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2025-02-06 02:19:37,509 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 02:19:37,509 INFO L218 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 02:19:37,518 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 [2025-02-06 02:19:37,709 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 [2025-02-06 02:19:37,710 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 02:19:37,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 02:19:37,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1484667962, now seen corresponding path program 1 times [2025-02-06 02:19:37,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 02:19:37,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013642858] [2025-02-06 02:19:37,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:37,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 02:19:37,741 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 391 statements into 1 equivalence classes. [2025-02-06 02:19:37,998 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 391 of 391 statements. [2025-02-06 02:19:37,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:37,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 02:19:38,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346835155] [2025-02-06 02:19:38,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:38,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 02:19:38,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 02:19:38,004 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) [2025-02-06 02:19:38,013 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 [2025-02-06 02:19:38,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 391 statements into 1 equivalence classes. [2025-02-06 02:19:38,259 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 391 of 391 statements. [2025-02-06 02:19:38,260 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:38,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:19:38,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 31 conjuncts are in the unsatisfiable core [2025-02-06 02:19:38,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 02:19:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 4393 proven. 651 refuted. 0 times theorem prover too weak. 2276 trivial. 0 not checked. [2025-02-06 02:19:40,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 02:19:41,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 02:19:41,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013642858] [2025-02-06 02:19:41,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 02:19:41,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346835155] [2025-02-06 02:19:41,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346835155] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 02:19:41,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-06 02:19:41,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2025-02-06 02:19:41,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181697866] [2025-02-06 02:19:41,620 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-06 02:19:41,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 02:19:41,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 02:19:41,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 02:19:41,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2025-02-06 02:19:41,621 INFO L87 Difference]: Start difference. First operand 1208 states and 1763 transitions. Second operand has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 18 states have internal predecessors, (116), 6 states have call successors, (61), 6 states have call predecessors, (61), 10 states have return successors, (61), 6 states have call predecessors, (61), 6 states have call successors, (61) [2025-02-06 02:19:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 02:19:43,740 INFO L93 Difference]: Finished difference Result 2296 states and 3244 transitions. [2025-02-06 02:19:43,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-02-06 02:19:43,741 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 18 states have internal predecessors, (116), 6 states have call successors, (61), 6 states have call predecessors, (61), 10 states have return successors, (61), 6 states have call predecessors, (61), 6 states have call successors, (61) Word has length 391 [2025-02-06 02:19:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 02:19:43,749 INFO L225 Difference]: With dead ends: 2296 [2025-02-06 02:19:43,750 INFO L226 Difference]: Without dead ends: 1867 [2025-02-06 02:19:43,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=513, Invalid=1839, Unknown=0, NotChecked=0, Total=2352 [2025-02-06 02:19:43,752 INFO L435 NwaCegarLoop]: 265 mSDtfsCounter, 821 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-02-06 02:19:43,753 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 1343 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-02-06 02:19:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2025-02-06 02:19:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1297. [2025-02-06 02:19:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1025 states have (on average 1.3375609756097562) internal successors, (1371), 1029 states have internal predecessors, (1371), 229 states have call successors, (229), 42 states have call predecessors, (229), 42 states have return successors, (229), 225 states have call predecessors, (229), 229 states have call successors, (229) [2025-02-06 02:19:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1829 transitions. [2025-02-06 02:19:43,880 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1829 transitions. Word has length 391 [2025-02-06 02:19:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 02:19:43,882 INFO L471 AbstractCegarLoop]: Abstraction has 1297 states and 1829 transitions. [2025-02-06 02:19:43,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 18 states have internal predecessors, (116), 6 states have call successors, (61), 6 states have call predecessors, (61), 10 states have return successors, (61), 6 states have call predecessors, (61), 6 states have call successors, (61) [2025-02-06 02:19:43,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1829 transitions. [2025-02-06 02:19:43,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2025-02-06 02:19:43,887 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 02:19:43,887 INFO L218 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 02:19:43,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 02:19:44,090 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 [2025-02-06 02:19:44,090 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 02:19:44,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 02:19:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1602450907, now seen corresponding path program 1 times [2025-02-06 02:19:44,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 02:19:44,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906399239] [2025-02-06 02:19:44,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:44,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 02:19:44,121 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 391 statements into 1 equivalence classes. [2025-02-06 02:19:44,445 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 391 of 391 statements. [2025-02-06 02:19:44,446 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:44,446 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 02:19:44,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459688534] [2025-02-06 02:19:44,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:19:44,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 02:19:44,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 02:19:44,457 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) [2025-02-06 02:19:44,462 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 [2025-02-06 02:19:44,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 391 statements into 1 equivalence classes. [2025-02-06 02:19:44,757 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 391 of 391 statements. [2025-02-06 02:19:44,758 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:19:44,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:19:44,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 02:19:44,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 02:19:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3290 proven. 456 refuted. 0 times theorem prover too weak. 3574 trivial. 0 not checked. [2025-02-06 02:19:49,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 02:19:51,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 02:19:51,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906399239] [2025-02-06 02:19:51,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 02:19:51,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459688534] [2025-02-06 02:19:51,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459688534] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 02:19:51,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-06 02:19:51,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2025-02-06 02:19:51,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770219740] [2025-02-06 02:19:51,722 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-06 02:19:51,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-06 02:19:51,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 02:19:51,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-06 02:19:51,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2025-02-06 02:19:51,724 INFO L87 Difference]: Start difference. First operand 1297 states and 1829 transitions. Second operand has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 5 states have call successors, (61), 5 states have call predecessors, (61), 7 states have return successors, (61), 4 states have call predecessors, (61), 5 states have call successors, (61) [2025-02-06 02:20:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 02:20:00,279 INFO L93 Difference]: Finished difference Result 3863 states and 5427 transitions. [2025-02-06 02:20:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-06 02:20:00,280 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 5 states have call successors, (61), 5 states have call predecessors, (61), 7 states have return successors, (61), 4 states have call predecessors, (61), 5 states have call successors, (61) Word has length 391 [2025-02-06 02:20:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 02:20:00,289 INFO L225 Difference]: With dead ends: 3863 [2025-02-06 02:20:00,289 INFO L226 Difference]: Without dead ends: 3433 [2025-02-06 02:20:00,292 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=700, Invalid=3590, Unknown=0, NotChecked=0, Total=4290 [2025-02-06 02:20:00,292 INFO L435 NwaCegarLoop]: 287 mSDtfsCounter, 1751 mSDsluCounter, 3415 mSDsCounter, 0 mSdLazyCounter, 2882 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1751 SdHoareTripleChecker+Valid, 3702 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2025-02-06 02:20:00,292 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1751 Valid, 3702 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2882 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2025-02-06 02:20:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3433 states. [2025-02-06 02:20:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3433 to 1545. [2025-02-06 02:20:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1265 states have (on average 1.3573122529644268) internal successors, (1717), 1271 states have internal predecessors, (1717), 233 states have call successors, (233), 46 states have call predecessors, (233), 46 states have return successors, (233), 227 states have call predecessors, (233), 233 states have call successors, (233) [2025-02-06 02:20:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2183 transitions. [2025-02-06 02:20:00,405 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2183 transitions. Word has length 391 [2025-02-06 02:20:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 02:20:00,405 INFO L471 AbstractCegarLoop]: Abstraction has 1545 states and 2183 transitions. [2025-02-06 02:20:00,406 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.6521739130434785) internal successors, (107), 22 states have internal predecessors, (107), 5 states have call successors, (61), 5 states have call predecessors, (61), 7 states have return successors, (61), 4 states have call predecessors, (61), 5 states have call successors, (61) [2025-02-06 02:20:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2183 transitions. [2025-02-06 02:20:00,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2025-02-06 02:20:00,408 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 02:20:00,408 INFO L218 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 02:20:00,421 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 [2025-02-06 02:20:00,612 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 [2025-02-06 02:20:00,613 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 02:20:00,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 02:20:00,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1608741209, now seen corresponding path program 1 times [2025-02-06 02:20:00,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 02:20:00,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549581241] [2025-02-06 02:20:00,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:20:00,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 02:20:00,632 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 391 statements into 1 equivalence classes. [2025-02-06 02:20:00,872 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 391 of 391 statements. [2025-02-06 02:20:00,872 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:20:00,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 02:20:00,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568830079] [2025-02-06 02:20:00,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:20:00,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 02:20:00,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 02:20:00,877 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) [2025-02-06 02:20:00,878 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 [2025-02-06 02:20:00,997 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 391 statements into 1 equivalence classes. [2025-02-06 02:20:01,128 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 391 of 391 statements. [2025-02-06 02:20:01,129 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:20:01,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:20:01,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-02-06 02:20:01,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 02:20:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3122 proven. 747 refuted. 0 times theorem prover too weak. 3451 trivial. 0 not checked. [2025-02-06 02:20:06,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 02:20:07,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 02:20:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549581241] [2025-02-06 02:20:07,633 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 02:20:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568830079] [2025-02-06 02:20:07,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568830079] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 02:20:07,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-06 02:20:07,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2025-02-06 02:20:07,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045231900] [2025-02-06 02:20:07,634 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-06 02:20:07,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-06 02:20:07,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 02:20:07,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-06 02:20:07,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2025-02-06 02:20:07,635 INFO L87 Difference]: Start difference. First operand 1545 states and 2183 transitions. Second operand has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 26 states have internal predecessors, (113), 6 states have call successors, (61), 6 states have call predecessors, (61), 9 states have return successors, (61), 6 states have call predecessors, (61), 6 states have call successors, (61) [2025-02-06 02:20:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 02:20:18,828 INFO L93 Difference]: Finished difference Result 3769 states and 5309 transitions. [2025-02-06 02:20:18,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-06 02:20:18,829 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 26 states have internal predecessors, (113), 6 states have call successors, (61), 6 states have call predecessors, (61), 9 states have return successors, (61), 6 states have call predecessors, (61), 6 states have call successors, (61) Word has length 391 [2025-02-06 02:20:18,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 02:20:18,837 INFO L225 Difference]: With dead ends: 3769 [2025-02-06 02:20:18,837 INFO L226 Difference]: Without dead ends: 3296 [2025-02-06 02:20:18,839 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=888, Invalid=4514, Unknown=0, NotChecked=0, Total=5402 [2025-02-06 02:20:18,840 INFO L435 NwaCegarLoop]: 306 mSDtfsCounter, 1285 mSDsluCounter, 4212 mSDsCounter, 0 mSdLazyCounter, 3980 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 4518 SdHoareTripleChecker+Invalid, 4156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 3980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2025-02-06 02:20:18,840 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1285 Valid, 4518 Invalid, 4156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 3980 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2025-02-06 02:20:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2025-02-06 02:20:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 1542. [2025-02-06 02:20:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1262 states have (on average 1.3573692551505547) internal successors, (1713), 1268 states have internal predecessors, (1713), 233 states have call successors, (233), 46 states have call predecessors, (233), 46 states have return successors, (233), 227 states have call predecessors, (233), 233 states have call successors, (233) [2025-02-06 02:20:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2179 transitions. [2025-02-06 02:20:18,947 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2179 transitions. Word has length 391 [2025-02-06 02:20:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 02:20:18,948 INFO L471 AbstractCegarLoop]: Abstraction has 1542 states and 2179 transitions. [2025-02-06 02:20:18,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 26 states have internal predecessors, (113), 6 states have call successors, (61), 6 states have call predecessors, (61), 9 states have return successors, (61), 6 states have call predecessors, (61), 6 states have call successors, (61) [2025-02-06 02:20:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2179 transitions. [2025-02-06 02:20:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2025-02-06 02:20:18,951 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 02:20:18,951 INFO L218 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 02:20:18,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 02:20:19,156 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 [2025-02-06 02:20:19,156 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-06 02:20:19,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 02:20:19,157 INFO L85 PathProgramCache]: Analyzing trace with hash 597373100, now seen corresponding path program 1 times [2025-02-06 02:20:19,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 02:20:19,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851393168] [2025-02-06 02:20:19,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:20:19,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 02:20:19,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 391 statements into 1 equivalence classes. [2025-02-06 02:20:19,487 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 391 of 391 statements. [2025-02-06 02:20:19,487 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:20:19,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 02:20:19,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189414924] [2025-02-06 02:20:19,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 02:20:19,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 02:20:19,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 02:20:19,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 02:20:19,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 02:20:19,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 391 statements into 1 equivalence classes. [2025-02-06 02:20:19,836 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 391 of 391 statements. [2025-02-06 02:20:19,836 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 02:20:19,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 02:20:19,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 02:20:19,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 02:20:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3458 proven. 123 refuted. 0 times theorem prover too weak. 3739 trivial. 0 not checked. [2025-02-06 02:20:23,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 02:20:33,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 02:20:33,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851393168] [2025-02-06 02:20:33,152 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 02:20:33,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189414924] [2025-02-06 02:20:33,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189414924] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 02:20:33,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-06 02:20:33,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2025-02-06 02:20:33,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180826687] [2025-02-06 02:20:33,153 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-06 02:20:33,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 02:20:33,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 02:20:33,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 02:20:33,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=179, Unknown=1, NotChecked=0, Total=240 [2025-02-06 02:20:33,154 INFO L87 Difference]: Start difference. First operand 1542 states and 2179 transitions. Second operand has 11 states, 11 states have (on average 8.909090909090908) internal successors, (98), 10 states have internal predecessors, (98), 3 states have call successors, (61), 3 states have call predecessors, (61), 4 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61)