./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 551b0097 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/nla-digbench-scaling/fermat1-ll_unwindbound50.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-09 03:20:07,870 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-09 03:20:07,925 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-01-09 03:20:07,929 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-09 03:20:07,930 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-09 03:20:07,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-09 03:20:07,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-09 03:20:07,951 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-09 03:20:07,951 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-09 03:20:07,951 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-09 03:20:07,952 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-09 03:20:07,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-09 03:20:07,952 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-09 03:20:07,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-09 03:20:07,953 INFO L153 SettingsManager]: * Use SBE=true [2025-01-09 03:20:07,953 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-09 03:20:07,953 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-09 03:20:07,953 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-09 03:20:07,953 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-09 03:20:07,953 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-09 03:20:07,953 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-09 03:20:07,953 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-09 03:20:07,954 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-09 03:20:07,954 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-09 03:20:07,954 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-09 03:20:07,954 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-09 03:20:07,954 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-09 03:20:07,954 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-09 03:20:07,954 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-09 03:20:07,954 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:20:07,954 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:20:07,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:20:07,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:20:07,955 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-09 03:20:07,955 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-09 03:20:07,955 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-09 03:20:07,955 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-09 03:20:07,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:20:07,955 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-09 03:20:07,955 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-09 03:20:07,955 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-09 03:20:07,955 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-09 03:20:07,956 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-09 03:20:07,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-09 03:20:07,956 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-09 03:20:07,956 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-09 03:20:07,956 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-09 03:20:07,956 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-09 03:20:07,956 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 -> ca2134f8a32f49a0943527ee47fd89b4eb01286294fd09a8197c7c707de74c1d [2025-01-09 03:20:08,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-09 03:20:08,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-09 03:20:08,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-09 03:20:08,169 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-09 03:20:08,170 INFO L274 PluginConnector]: CDTParser initialized [2025-01-09 03:20:08,170 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2025-01-09 03:20:09,357 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/949b82a56/09b5605f36df452793a2ec85c05addbb/FLAGefa854f8f [2025-01-09 03:20:09,622 INFO L384 CDTParser]: Found 1 translation units. [2025-01-09 03:20:09,622 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound50.c [2025-01-09 03:20:09,629 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/949b82a56/09b5605f36df452793a2ec85c05addbb/FLAGefa854f8f [2025-01-09 03:20:09,925 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/949b82a56/09b5605f36df452793a2ec85c05addbb [2025-01-09 03:20:09,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-09 03:20:09,927 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-09 03:20:09,928 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-09 03:20:09,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-09 03:20:09,931 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-09 03:20:09,932 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:20:09" (1/1) ... [2025-01-09 03:20:09,932 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177dd267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:09, skipping insertion in model container [2025-01-09 03:20:09,932 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 03:20:09" (1/1) ... [2025-01-09 03:20:09,941 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-09 03:20:10,033 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/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2025-01-09 03:20:10,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:20:10,053 INFO L200 MainTranslator]: Completed pre-run [2025-01-09 03:20:10,059 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/nla-digbench-scaling/fermat1-ll_unwindbound50.c[535,548] [2025-01-09 03:20:10,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-09 03:20:10,072 INFO L204 MainTranslator]: Completed translation [2025-01-09 03:20:10,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10 WrapperNode [2025-01-09 03:20:10,072 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-09 03:20:10,073 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-09 03:20:10,073 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-09 03:20:10,073 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-09 03:20:10,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,080 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,090 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2025-01-09 03:20:10,090 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-09 03:20:10,090 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-09 03:20:10,090 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-09 03:20:10,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-09 03:20:10,095 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,096 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,103 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]. [2025-01-09 03:20:10,103 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,103 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,104 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,105 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,107 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,108 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,108 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,109 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-09 03:20:10,109 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-09 03:20:10,109 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-09 03:20:10,109 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-09 03:20:10,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (1/1) ... [2025-01-09 03:20:10,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-09 03:20:10,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:10,134 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) [2025-01-09 03:20:10,138 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 [2025-01-09 03:20:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-09 03:20:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-01-09 03:20:10,151 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-01-09 03:20:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-09 03:20:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-09 03:20:10,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-09 03:20:10,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-01-09 03:20:10,151 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-01-09 03:20:10,187 INFO L234 CfgBuilder]: Building ICFG [2025-01-09 03:20:10,188 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-09 03:20:10,322 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2025-01-09 03:20:10,322 INFO L283 CfgBuilder]: Performing block encoding [2025-01-09 03:20:10,330 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-09 03:20:10,330 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2025-01-09 03:20:10,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:20:10 BoogieIcfgContainer [2025-01-09 03:20:10,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-09 03:20:10,333 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-09 03:20:10,333 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-09 03:20:10,337 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-09 03:20:10,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 03:20:09" (1/3) ... [2025-01-09 03:20:10,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3992bcb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:20:10, skipping insertion in model container [2025-01-09 03:20:10,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 03:20:10" (2/3) ... [2025-01-09 03:20:10,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3992bcb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 03:20:10, skipping insertion in model container [2025-01-09 03:20:10,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 03:20:10" (3/3) ... [2025-01-09 03:20:10,339 INFO L128 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound50.c [2025-01-09 03:20:10,349 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-09 03:20:10,350 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fermat1-ll_unwindbound50.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-09 03:20:10,391 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-09 03:20:10,399 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;@77a3ddaf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-09 03:20:10,400 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-01-09 03:20:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 03:20:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2025-01-09 03:20:10,408 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:10,408 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:10,409 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:10,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2025-01-09 03:20:10,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:10,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904361733] [2025-01-09 03:20:10,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:10,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:10,472 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 03:20:10,482 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 03:20:10,482 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:10,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 03:20:10,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:10,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904361733] [2025-01-09 03:20:10,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904361733] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:10,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716500003] [2025-01-09 03:20:10,515 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:10,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:10,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:10,522 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) [2025-01-09 03:20:10,523 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 [2025-01-09 03:20:10,557 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-01-09 03:20:10,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-01-09 03:20:10,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:10,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:10,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-01-09 03:20:10,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-01-09 03:20:10,591 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:20:10,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716500003] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:20:10,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-09 03:20:10,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-01-09 03:20:10,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276969757] [2025-01-09 03:20:10,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:20:10,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-01-09 03:20:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:10,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-01-09 03:20:10,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:20:10,611 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 03:20:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:10,623 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2025-01-09 03:20:10,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-09 03:20:10,625 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2025-01-09 03:20:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:10,628 INFO L225 Difference]: With dead ends: 61 [2025-01-09 03:20:10,629 INFO L226 Difference]: Without dead ends: 28 [2025-01-09 03:20:10,631 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-01-09 03:20:10,632 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:10,633 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:20:10,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2025-01-09 03:20:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2025-01-09 03:20:10,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 03:20:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2025-01-09 03:20:10,654 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2025-01-09 03:20:10,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:10,654 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2025-01-09 03:20:10,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-09 03:20:10,654 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2025-01-09 03:20:10,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-01-09 03:20:10,655 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:10,655 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:10,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-09 03:20:10,856 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 [2025-01-09 03:20:10,856 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:10,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:10,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1800491340, now seen corresponding path program 1 times [2025-01-09 03:20:10,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:10,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406117724] [2025-01-09 03:20:10,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:10,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:10,862 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-09 03:20:10,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 03:20:10,882 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:10,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-01-09 03:20:10,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957249074] [2025-01-09 03:20:10,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:10,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:10,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:10,888 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) [2025-01-09 03:20:10,892 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 [2025-01-09 03:20:10,929 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-09 03:20:10,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 03:20:10,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:10,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:10,948 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 03:20:10,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:11,117 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-09 03:20:11,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406117724] [2025-01-09 03:20:11,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-01-09 03:20:11,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957249074] [2025-01-09 03:20:11,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957249074] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:20:11,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:20:11,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:20:11,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989863471] [2025-01-09 03:20:11,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:20:11,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:20:11,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:11,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:20:11,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:20:11,120 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 03:20:12,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-01-09 03:20:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:12,717 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2025-01-09 03:20:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:20:12,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-01-09 03:20:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:12,722 INFO L225 Difference]: With dead ends: 47 [2025-01-09 03:20:12,722 INFO L226 Difference]: Without dead ends: 45 [2025-01-09 03:20:12,723 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:20:12,723 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:12,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 101 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-01-09 03:20:12,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2025-01-09 03:20:12,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2025-01-09 03:20:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-01-09 03:20:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2025-01-09 03:20:12,756 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 19 [2025-01-09 03:20:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:12,757 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2025-01-09 03:20:12,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 03:20:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2025-01-09 03:20:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2025-01-09 03:20:12,757 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:12,762 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:12,769 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 [2025-01-09 03:20:12,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:12,963 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:12,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:12,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1798465552, now seen corresponding path program 1 times [2025-01-09 03:20:12,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:12,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535243925] [2025-01-09 03:20:12,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:12,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:12,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-09 03:20:12,986 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-09 03:20:12,987 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:12,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:13,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:13,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535243925] [2025-01-09 03:20:13,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535243925] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:20:13,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:20:13,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 03:20:13,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678407647] [2025-01-09 03:20:13,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:20:13,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 03:20:13,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:13,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 03:20:13,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:20:13,036 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 03:20:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:13,053 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2025-01-09 03:20:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 03:20:13,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2025-01-09 03:20:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:13,054 INFO L225 Difference]: With dead ends: 53 [2025-01-09 03:20:13,054 INFO L226 Difference]: Without dead ends: 46 [2025-01-09 03:20:13,055 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:20:13,055 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:13,056 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:20:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2025-01-09 03:20:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2025-01-09 03:20:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2025-01-09 03:20:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2025-01-09 03:20:13,063 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2025-01-09 03:20:13,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:13,064 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2025-01-09 03:20:13,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-01-09 03:20:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2025-01-09 03:20:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-09 03:20:13,064 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:13,064 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:13,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-09 03:20:13,064 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:13,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:13,065 INFO L85 PathProgramCache]: Analyzing trace with hash 884762201, now seen corresponding path program 1 times [2025-01-09 03:20:13,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:13,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506251529] [2025-01-09 03:20:13,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:13,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:13,069 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 03:20:13,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 03:20:13,080 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:13,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:13,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:13,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506251529] [2025-01-09 03:20:13,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506251529] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:13,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466718400] [2025-01-09 03:20:13,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:13,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:13,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:13,296 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) [2025-01-09 03:20:13,301 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 [2025-01-09 03:20:13,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-09 03:20:13,330 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-09 03:20:13,330 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:13,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:13,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-09 03:20:13,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:13,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:13,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466718400] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:13,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:13,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2025-01-09 03:20:13,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985441763] [2025-01-09 03:20:13,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:13,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 03:20:13,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:13,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 03:20:13,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2025-01-09 03:20:13,475 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-01-09 03:20:13,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:13,587 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2025-01-09 03:20:13,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-09 03:20:13,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 25 [2025-01-09 03:20:13,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:13,590 INFO L225 Difference]: With dead ends: 53 [2025-01-09 03:20:13,590 INFO L226 Difference]: Without dead ends: 48 [2025-01-09 03:20:13,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-01-09 03:20:13,591 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:13,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 133 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:20:13,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2025-01-09 03:20:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2025-01-09 03:20:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-01-09 03:20:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2025-01-09 03:20:13,604 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2025-01-09 03:20:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:13,604 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2025-01-09 03:20:13,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2025-01-09 03:20:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2025-01-09 03:20:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-01-09 03:20:13,605 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:13,605 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:13,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-09 03:20:13,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:13,809 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:13,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1887642954, now seen corresponding path program 1 times [2025-01-09 03:20:13,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:13,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185364929] [2025-01-09 03:20:13,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:13,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:13,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-01-09 03:20:13,827 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-01-09 03:20:13,830 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:13,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:13,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185364929] [2025-01-09 03:20:13,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185364929] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:20:13,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:20:13,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-01-09 03:20:13,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682650455] [2025-01-09 03:20:13,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:20:13,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-09 03:20:13,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:13,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-09 03:20:13,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:20:13,936 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 03:20:14,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:14,001 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2025-01-09 03:20:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-09 03:20:14,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2025-01-09 03:20:14,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:14,003 INFO L225 Difference]: With dead ends: 61 [2025-01-09 03:20:14,003 INFO L226 Difference]: Without dead ends: 40 [2025-01-09 03:20:14,003 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-09 03:20:14,005 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:14,005 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 91 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:20:14,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2025-01-09 03:20:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2025-01-09 03:20:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-01-09 03:20:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-01-09 03:20:14,024 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2025-01-09 03:20:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:14,025 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-01-09 03:20:14,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-01-09 03:20:14,025 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-01-09 03:20:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2025-01-09 03:20:14,025 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:14,025 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:14,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-01-09 03:20:14,026 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:14,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:14,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1075457857, now seen corresponding path program 1 times [2025-01-09 03:20:14,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:14,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735296259] [2025-01-09 03:20:14,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:14,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:14,034 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-01-09 03:20:14,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-01-09 03:20:14,047 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:14,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-09 03:20:14,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:14,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735296259] [2025-01-09 03:20:14,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735296259] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:20:14,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:20:14,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-01-09 03:20:14,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654727355] [2025-01-09 03:20:14,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:20:14,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-09 03:20:14,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:14,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-09 03:20:14,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:20:14,136 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-01-09 03:20:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:14,181 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2025-01-09 03:20:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 03:20:14,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2025-01-09 03:20:14,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:14,183 INFO L225 Difference]: With dead ends: 70 [2025-01-09 03:20:14,183 INFO L226 Difference]: Without dead ends: 49 [2025-01-09 03:20:14,184 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-01-09 03:20:14,184 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:14,184 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:20:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-01-09 03:20:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2025-01-09 03:20:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2025-01-09 03:20:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2025-01-09 03:20:14,194 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2025-01-09 03:20:14,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:14,195 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2025-01-09 03:20:14,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2025-01-09 03:20:14,195 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2025-01-09 03:20:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-01-09 03:20:14,197 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:14,197 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:14,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-01-09 03:20:14,197 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:14,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:14,198 INFO L85 PathProgramCache]: Analyzing trace with hash 674693734, now seen corresponding path program 1 times [2025-01-09 03:20:14,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:14,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818171876] [2025-01-09 03:20:14,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:14,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:14,202 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 03:20:14,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 03:20:14,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:14,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-09 03:20:14,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818171876] [2025-01-09 03:20:14,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818171876] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481002189] [2025-01-09 03:20:14,266 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:14,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:14,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:14,270 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) [2025-01-09 03:20:14,271 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 [2025-01-09 03:20:14,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-01-09 03:20:14,303 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-01-09 03:20:14,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:14,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:14,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-09 03:20:14,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:14,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-09 03:20:14,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481002189] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:14,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:14,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-01-09 03:20:14,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600400116] [2025-01-09 03:20:14,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:14,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-09 03:20:14,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:14,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-09 03:20:14,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-01-09 03:20:14,397 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2025-01-09 03:20:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:14,549 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2025-01-09 03:20:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-09 03:20:14,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 39 [2025-01-09 03:20:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:14,555 INFO L225 Difference]: With dead ends: 125 [2025-01-09 03:20:14,555 INFO L226 Difference]: Without dead ends: 104 [2025-01-09 03:20:14,556 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:20:14,556 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 64 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:14,556 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 141 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:20:14,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-01-09 03:20:14,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2025-01-09 03:20:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2025-01-09 03:20:14,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2025-01-09 03:20:14,585 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2025-01-09 03:20:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:14,585 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2025-01-09 03:20:14,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2025-01-09 03:20:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2025-01-09 03:20:14,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2025-01-09 03:20:14,586 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:14,586 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:14,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-09 03:20:14,787 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,SelfDestructingSolverStorable6 [2025-01-09 03:20:14,787 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:14,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash -126912254, now seen corresponding path program 1 times [2025-01-09 03:20:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:14,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099199517] [2025-01-09 03:20:14,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:14,793 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 43 statements into 1 equivalence classes. [2025-01-09 03:20:14,796 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 43 of 43 statements. [2025-01-09 03:20:14,796 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:14,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-09 03:20:14,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:14,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099199517] [2025-01-09 03:20:14,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099199517] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:20:14,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:20:14,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 03:20:14,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73711887] [2025-01-09 03:20:14,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:20:14,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 03:20:14,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:14,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 03:20:14,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:20:14,842 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-01-09 03:20:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:14,891 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2025-01-09 03:20:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 03:20:14,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2025-01-09 03:20:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:14,893 INFO L225 Difference]: With dead ends: 154 [2025-01-09 03:20:14,893 INFO L226 Difference]: Without dead ends: 115 [2025-01-09 03:20:14,894 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:20:14,894 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 20 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:14,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 87 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:20:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-01-09 03:20:14,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2025-01-09 03:20:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2025-01-09 03:20:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2025-01-09 03:20:14,917 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2025-01-09 03:20:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:14,918 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2025-01-09 03:20:14,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2025-01-09 03:20:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2025-01-09 03:20:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-01-09 03:20:14,918 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:14,919 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:14,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-01-09 03:20:14,919 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:14,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:14,919 INFO L85 PathProgramCache]: Analyzing trace with hash -38739799, now seen corresponding path program 1 times [2025-01-09 03:20:14,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:14,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757967738] [2025-01-09 03:20:14,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:14,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:14,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-01-09 03:20:14,928 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-01-09 03:20:14,928 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:14,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-09 03:20:15,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757967738] [2025-01-09 03:20:15,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757967738] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:15,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673713979] [2025-01-09 03:20:15,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:15,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:15,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:15,024 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) [2025-01-09 03:20:15,026 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 [2025-01-09 03:20:15,050 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-01-09 03:20:15,063 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-01-09 03:20:15,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:15,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:15,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-09 03:20:15,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:15,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-01-09 03:20:15,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673713979] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:15,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:15,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2025-01-09 03:20:15,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011526413] [2025-01-09 03:20:15,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:15,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-09 03:20:15,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:15,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-09 03:20:15,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2025-01-09 03:20:15,296 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2025-01-09 03:20:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:15,488 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2025-01-09 03:20:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-09 03:20:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 45 [2025-01-09 03:20:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:15,490 INFO L225 Difference]: With dead ends: 215 [2025-01-09 03:20:15,490 INFO L226 Difference]: Without dead ends: 168 [2025-01-09 03:20:15,490 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2025-01-09 03:20:15,491 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 75 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:15,491 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 162 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-09 03:20:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2025-01-09 03:20:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2025-01-09 03:20:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2025-01-09 03:20:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2025-01-09 03:20:15,522 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2025-01-09 03:20:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:15,523 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2025-01-09 03:20:15,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2025-01-09 03:20:15,523 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2025-01-09 03:20:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-01-09 03:20:15,523 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:15,524 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:15,533 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 [2025-01-09 03:20:15,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:15,725 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:15,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:15,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1239773548, now seen corresponding path program 1 times [2025-01-09 03:20:15,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:15,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89555154] [2025-01-09 03:20:15,725 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:15,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:15,729 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-01-09 03:20:15,734 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-01-09 03:20:15,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:15,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-09 03:20:15,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:15,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89555154] [2025-01-09 03:20:15,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89555154] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:15,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89235246] [2025-01-09 03:20:15,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:15,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:15,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:15,814 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) [2025-01-09 03:20:15,815 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 [2025-01-09 03:20:15,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-01-09 03:20:15,853 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-01-09 03:20:15,853 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:15,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:15,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-01-09 03:20:15,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:15,920 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-01-09 03:20:16,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89235246] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:16,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:16,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2025-01-09 03:20:16,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808739653] [2025-01-09 03:20:16,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:16,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-09 03:20:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:16,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-09 03:20:16,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:20:16,026 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2025-01-09 03:20:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:16,279 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2025-01-09 03:20:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-09 03:20:16,279 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 51 [2025-01-09 03:20:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:16,281 INFO L225 Difference]: With dead ends: 207 [2025-01-09 03:20:16,281 INFO L226 Difference]: Without dead ends: 202 [2025-01-09 03:20:16,281 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2025-01-09 03:20:16,281 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 149 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:16,282 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 171 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-09 03:20:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2025-01-09 03:20:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2025-01-09 03:20:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2025-01-09 03:20:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2025-01-09 03:20:16,328 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2025-01-09 03:20:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:16,328 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2025-01-09 03:20:16,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2025-01-09 03:20:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2025-01-09 03:20:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-01-09 03:20:16,330 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:16,330 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:16,336 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 [2025-01-09 03:20:16,535 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,SelfDestructingSolverStorable9 [2025-01-09 03:20:16,535 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:16,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:16,535 INFO L85 PathProgramCache]: Analyzing trace with hash 777122842, now seen corresponding path program 1 times [2025-01-09 03:20:16,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:16,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433510554] [2025-01-09 03:20:16,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:16,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:16,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-01-09 03:20:16,552 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-01-09 03:20:16,552 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:16,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-01-09 03:20:16,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:16,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433510554] [2025-01-09 03:20:16,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433510554] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:16,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122081264] [2025-01-09 03:20:16,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:16,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:16,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:16,809 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) [2025-01-09 03:20:16,813 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 [2025-01-09 03:20:16,839 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 87 statements into 1 equivalence classes. [2025-01-09 03:20:16,860 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 87 of 87 statements. [2025-01-09 03:20:16,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:16,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:16,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-01-09 03:20:16,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:16,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2025-01-09 03:20:17,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122081264] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:17,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:17,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2025-01-09 03:20:17,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983862217] [2025-01-09 03:20:17,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:17,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-01-09 03:20:17,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:17,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-01-09 03:20:17,207 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2025-01-09 03:20:17,207 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) [2025-01-09 03:20:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:17,782 INFO L93 Difference]: Finished difference Result 549 states and 749 transitions. [2025-01-09 03:20:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-01-09 03:20:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) Word has length 87 [2025-01-09 03:20:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:17,785 INFO L225 Difference]: With dead ends: 549 [2025-01-09 03:20:17,785 INFO L226 Difference]: Without dead ends: 491 [2025-01-09 03:20:17,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=507, Invalid=899, Unknown=0, NotChecked=0, Total=1406 [2025-01-09 03:20:17,786 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 337 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:17,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 318 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 03:20:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2025-01-09 03:20:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 449. [2025-01-09 03:20:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 336 states have (on average 1.2470238095238095) internal successors, (419), 339 states have internal predecessors, (419), 93 states have call successors, (93), 20 states have call predecessors, (93), 19 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2025-01-09 03:20:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 604 transitions. [2025-01-09 03:20:17,910 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 604 transitions. Word has length 87 [2025-01-09 03:20:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:17,911 INFO L471 AbstractCegarLoop]: Abstraction has 449 states and 604 transitions. [2025-01-09 03:20:17,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 19 states have call successors, (31), 11 states have call predecessors, (31), 10 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) [2025-01-09 03:20:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 604 transitions. [2025-01-09 03:20:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-01-09 03:20:17,916 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:17,916 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:17,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-09 03:20:18,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:18,118 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:18,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:18,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1417240327, now seen corresponding path program 1 times [2025-01-09 03:20:18,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:18,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474860160] [2025-01-09 03:20:18,122 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:18,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:18,126 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-01-09 03:20:18,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-01-09 03:20:18,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:18,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2025-01-09 03:20:18,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:18,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474860160] [2025-01-09 03:20:18,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474860160] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:20:18,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:20:18,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 03:20:18,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685722885] [2025-01-09 03:20:18,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:20:18,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 03:20:18,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:18,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 03:20:18,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:20:18,216 INFO L87 Difference]: Start difference. First operand 449 states and 604 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-01-09 03:20:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:18,305 INFO L93 Difference]: Finished difference Result 809 states and 1107 transitions. [2025-01-09 03:20:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 03:20:18,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 93 [2025-01-09 03:20:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:18,308 INFO L225 Difference]: With dead ends: 809 [2025-01-09 03:20:18,308 INFO L226 Difference]: Without dead ends: 485 [2025-01-09 03:20:18,309 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:20:18,309 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:18,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 96 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:20:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2025-01-09 03:20:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 479. [2025-01-09 03:20:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 359 states have (on average 1.2311977715877438) internal successors, (442), 362 states have internal predecessors, (442), 100 states have call successors, (100), 20 states have call predecessors, (100), 19 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2025-01-09 03:20:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 641 transitions. [2025-01-09 03:20:18,410 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 641 transitions. Word has length 93 [2025-01-09 03:20:18,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:18,411 INFO L471 AbstractCegarLoop]: Abstraction has 479 states and 641 transitions. [2025-01-09 03:20:18,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2025-01-09 03:20:18,411 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 641 transitions. [2025-01-09 03:20:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-01-09 03:20:18,412 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:18,412 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:18,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-01-09 03:20:18,412 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:18,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:18,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1117881643, now seen corresponding path program 1 times [2025-01-09 03:20:18,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:18,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286184353] [2025-01-09 03:20:18,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:18,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:18,416 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-01-09 03:20:18,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-01-09 03:20:18,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:18,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 48 proven. 16 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-01-09 03:20:18,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:18,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286184353] [2025-01-09 03:20:18,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286184353] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:18,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292181257] [2025-01-09 03:20:18,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:18,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:18,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:18,493 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) [2025-01-09 03:20:18,498 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 [2025-01-09 03:20:18,530 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 93 statements into 1 equivalence classes. [2025-01-09 03:20:18,552 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 93 of 93 statements. [2025-01-09 03:20:18,552 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:18,552 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:18,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-09 03:20:18,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 70 proven. 16 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2025-01-09 03:20:18,599 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2025-01-09 03:20:18,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292181257] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:18,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:18,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2025-01-09 03:20:18,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006846512] [2025-01-09 03:20:18,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:18,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-09 03:20:18,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:18,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-09 03:20:18,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:20:18,672 INFO L87 Difference]: Start difference. First operand 479 states and 641 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 7 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2025-01-09 03:20:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:18,877 INFO L93 Difference]: Finished difference Result 1447 states and 2023 transitions. [2025-01-09 03:20:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-09 03:20:18,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 7 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 93 [2025-01-09 03:20:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:18,885 INFO L225 Difference]: With dead ends: 1447 [2025-01-09 03:20:18,886 INFO L226 Difference]: Without dead ends: 1024 [2025-01-09 03:20:18,888 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2025-01-09 03:20:18,888 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:18,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 210 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:20:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2025-01-09 03:20:19,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1011. [2025-01-09 03:20:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 763 states have (on average 1.254259501965924) internal successors, (957), 772 states have internal predecessors, (957), 228 states have call successors, (228), 20 states have call predecessors, (228), 19 states have return successors, (227), 218 states have call predecessors, (227), 227 states have call successors, (227) [2025-01-09 03:20:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1412 transitions. [2025-01-09 03:20:19,106 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1412 transitions. Word has length 93 [2025-01-09 03:20:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:19,106 INFO L471 AbstractCegarLoop]: Abstraction has 1011 states and 1412 transitions. [2025-01-09 03:20:19,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 7 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2025-01-09 03:20:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1412 transitions. [2025-01-09 03:20:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2025-01-09 03:20:19,108 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:19,108 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:19,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-09 03:20:19,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:19,309 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:19,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527453, now seen corresponding path program 2 times [2025-01-09 03:20:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:19,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687905507] [2025-01-09 03:20:19,310 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:20:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:19,316 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 93 statements into 2 equivalence classes. [2025-01-09 03:20:19,326 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 93 of 93 statements. [2025-01-09 03:20:19,326 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:20:19,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-01-09 03:20:19,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:19,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687905507] [2025-01-09 03:20:19,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687905507] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:19,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808885989] [2025-01-09 03:20:19,522 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:20:19,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:19,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:19,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:20:19,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-09 03:20:19,553 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 93 statements into 2 equivalence classes. [2025-01-09 03:20:19,573 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 93 of 93 statements. [2025-01-09 03:20:19,573 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:20:19,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:19,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-09 03:20:19,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:19,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-01-09 03:20:19,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808885989] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:19,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:19,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 24 [2025-01-09 03:20:19,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901786837] [2025-01-09 03:20:19,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:19,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-09 03:20:19,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:19,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-09 03:20:19,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2025-01-09 03:20:19,869 INFO L87 Difference]: Start difference. First operand 1011 states and 1412 transitions. Second operand has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2025-01-09 03:20:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:20,461 INFO L93 Difference]: Finished difference Result 1457 states and 2024 transitions. [2025-01-09 03:20:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-01-09 03:20:20,462 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) Word has length 93 [2025-01-09 03:20:20,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:20,467 INFO L225 Difference]: With dead ends: 1457 [2025-01-09 03:20:20,467 INFO L226 Difference]: Without dead ends: 795 [2025-01-09 03:20:20,469 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1056, Unknown=0, NotChecked=0, Total=1640 [2025-01-09 03:20:20,470 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 312 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:20,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 320 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 03:20:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2025-01-09 03:20:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 737. [2025-01-09 03:20:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 553 states have (on average 1.209764918625678) internal successors, (669), 558 states have internal predecessors, (669), 162 states have call successors, (162), 22 states have call predecessors, (162), 21 states have return successors, (161), 156 states have call predecessors, (161), 161 states have call successors, (161) [2025-01-09 03:20:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 992 transitions. [2025-01-09 03:20:20,592 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 992 transitions. Word has length 93 [2025-01-09 03:20:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:20,593 INFO L471 AbstractCegarLoop]: Abstraction has 737 states and 992 transitions. [2025-01-09 03:20:20,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.375) internal successors, (105), 24 states have internal predecessors, (105), 21 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2025-01-09 03:20:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 992 transitions. [2025-01-09 03:20:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2025-01-09 03:20:20,594 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:20,594 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:20,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-09 03:20:20,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:20,799 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:20,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:20,801 INFO L85 PathProgramCache]: Analyzing trace with hash 104822048, now seen corresponding path program 1 times [2025-01-09 03:20:20,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:20,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849411225] [2025-01-09 03:20:20,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:20,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:20,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 99 statements into 1 equivalence classes. [2025-01-09 03:20:20,817 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 99 of 99 statements. [2025-01-09 03:20:20,817 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:20,817 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2025-01-09 03:20:21,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:21,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849411225] [2025-01-09 03:20:21,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849411225] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:21,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454496936] [2025-01-09 03:20:21,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-09 03:20:21,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:21,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:21,022 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:20:21,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-09 03:20:21,048 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 99 statements into 1 equivalence classes. [2025-01-09 03:20:21,068 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 99 of 99 statements. [2025-01-09 03:20:21,068 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-09 03:20:21,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:21,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-01-09 03:20:21,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:20:21,164 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2025-01-09 03:20:21,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454496936] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:21,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:21,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 26 [2025-01-09 03:20:21,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276392486] [2025-01-09 03:20:21,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:21,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-01-09 03:20:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:21,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-01-09 03:20:21,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2025-01-09 03:20:21,435 INFO L87 Difference]: Start difference. First operand 737 states and 992 transitions. Second operand has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) [2025-01-09 03:20:22,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:22,155 INFO L93 Difference]: Finished difference Result 848 states and 1150 transitions. [2025-01-09 03:20:22,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2025-01-09 03:20:22,156 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) Word has length 99 [2025-01-09 03:20:22,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:22,160 INFO L225 Difference]: With dead ends: 848 [2025-01-09 03:20:22,160 INFO L226 Difference]: Without dead ends: 843 [2025-01-09 03:20:22,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=670, Invalid=1222, Unknown=0, NotChecked=0, Total=1892 [2025-01-09 03:20:22,162 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 352 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:22,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 306 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-09 03:20:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2025-01-09 03:20:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 828. [2025-01-09 03:20:22,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 622 states have (on average 1.1881028938906752) internal successors, (739), 628 states have internal predecessors, (739), 182 states have call successors, (182), 24 states have call predecessors, (182), 23 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2025-01-09 03:20:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1102 transitions. [2025-01-09 03:20:22,303 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1102 transitions. Word has length 99 [2025-01-09 03:20:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:22,303 INFO L471 AbstractCegarLoop]: Abstraction has 828 states and 1102 transitions. [2025-01-09 03:20:22,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.3076923076923075) internal successors, (112), 26 states have internal predecessors, (112), 23 states have call successors, (37), 13 states have call predecessors, (37), 12 states have return successors, (36), 22 states have call predecessors, (36), 22 states have call successors, (36) [2025-01-09 03:20:22,304 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1102 transitions. [2025-01-09 03:20:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-01-09 03:20:22,310 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:22,310 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:22,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-09 03:20:22,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-01-09 03:20:22,511 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:22,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash -993436764, now seen corresponding path program 2 times [2025-01-09 03:20:22,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:22,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841546747] [2025-01-09 03:20:22,512 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:20:22,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:22,523 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 183 statements into 2 equivalence classes. [2025-01-09 03:20:22,533 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 183 of 183 statements. [2025-01-09 03:20:22,534 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:20:22,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2025-01-09 03:20:22,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:22,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841546747] [2025-01-09 03:20:22,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841546747] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-09 03:20:22,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-09 03:20:22,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-09 03:20:22,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216175381] [2025-01-09 03:20:22,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-09 03:20:22,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-09 03:20:22,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:22,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-09 03:20:22,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:20:22,579 INFO L87 Difference]: Start difference. First operand 828 states and 1102 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-01-09 03:20:22,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:22,699 INFO L93 Difference]: Finished difference Result 1341 states and 1782 transitions. [2025-01-09 03:20:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-09 03:20:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 183 [2025-01-09 03:20:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:22,703 INFO L225 Difference]: With dead ends: 1341 [2025-01-09 03:20:22,703 INFO L226 Difference]: Without dead ends: 858 [2025-01-09 03:20:22,704 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-01-09 03:20:22,705 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:22,706 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 91 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-09 03:20:22,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2025-01-09 03:20:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 803. [2025-01-09 03:20:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 606 states have (on average 1.1798679867986799) internal successors, (715), 613 states have internal predecessors, (715), 173 states have call successors, (173), 24 states have call predecessors, (173), 23 states have return successors, (172), 165 states have call predecessors, (172), 172 states have call successors, (172) [2025-01-09 03:20:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1060 transitions. [2025-01-09 03:20:22,823 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1060 transitions. Word has length 183 [2025-01-09 03:20:22,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:22,823 INFO L471 AbstractCegarLoop]: Abstraction has 803 states and 1060 transitions. [2025-01-09 03:20:22,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2025-01-09 03:20:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1060 transitions. [2025-01-09 03:20:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-01-09 03:20:22,828 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:22,829 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:22,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-01-09 03:20:22,829 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:22,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:22,829 INFO L85 PathProgramCache]: Analyzing trace with hash 167568258, now seen corresponding path program 3 times [2025-01-09 03:20:22,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:22,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510987541] [2025-01-09 03:20:22,829 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:20:22,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:22,839 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 183 statements into 12 equivalence classes. [2025-01-09 03:20:22,866 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 135 of 183 statements. [2025-01-09 03:20:22,866 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-09 03:20:22,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2025-01-09 03:20:23,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:23,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510987541] [2025-01-09 03:20:23,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510987541] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:23,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678149959] [2025-01-09 03:20:23,026 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:20:23,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:23,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:23,028 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:20:23,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-09 03:20:23,060 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 183 statements into 12 equivalence classes. [2025-01-09 03:20:23,168 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 135 of 183 statements. [2025-01-09 03:20:23,168 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-09 03:20:23,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:23,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 03:20:23,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 224 proven. 100 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2025-01-09 03:20:23,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 224 proven. 100 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2025-01-09 03:20:23,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678149959] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:23,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:23,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2025-01-09 03:20:23,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001356305] [2025-01-09 03:20:23,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:23,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-09 03:20:23,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:23,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-09 03:20:23,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2025-01-09 03:20:23,705 INFO L87 Difference]: Start difference. First operand 803 states and 1060 transitions. Second operand has 20 states, 20 states have (on average 6.55) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2025-01-09 03:20:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:25,401 INFO L93 Difference]: Finished difference Result 3365 states and 4723 transitions. [2025-01-09 03:20:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-01-09 03:20:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.55) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) Word has length 183 [2025-01-09 03:20:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:25,415 INFO L225 Difference]: With dead ends: 3365 [2025-01-09 03:20:25,415 INFO L226 Difference]: Without dead ends: 3066 [2025-01-09 03:20:25,417 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=555, Invalid=2097, Unknown=0, NotChecked=0, Total=2652 [2025-01-09 03:20:25,418 INFO L435 NwaCegarLoop]: 222 mSDtfsCounter, 377 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:25,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1850 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 03:20:25,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2025-01-09 03:20:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2563. [2025-01-09 03:20:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 1937 states have (on average 1.2395456892101187) internal successors, (2401), 1972 states have internal predecessors, (2401), 602 states have call successors, (602), 24 states have call predecessors, (602), 23 states have return successors, (601), 566 states have call predecessors, (601), 601 states have call successors, (601) [2025-01-09 03:20:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 3604 transitions. [2025-01-09 03:20:25,847 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 3604 transitions. Word has length 183 [2025-01-09 03:20:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:25,848 INFO L471 AbstractCegarLoop]: Abstraction has 2563 states and 3604 transitions. [2025-01-09 03:20:25,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.55) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 19 states have call predecessors, (38), 19 states have call successors, (38) [2025-01-09 03:20:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 3604 transitions. [2025-01-09 03:20:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-01-09 03:20:25,855 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:25,855 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 9, 8, 8, 8, 8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:25,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-09 03:20:26,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-09 03:20:26,059 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:26,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:26,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1795040542, now seen corresponding path program 4 times [2025-01-09 03:20:26,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:26,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633748201] [2025-01-09 03:20:26,060 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:20:26,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:26,069 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 183 statements into 2 equivalence classes. [2025-01-09 03:20:26,081 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 158 of 183 statements. [2025-01-09 03:20:26,082 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 03:20:26,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 196 proven. 20 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2025-01-09 03:20:26,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:26,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633748201] [2025-01-09 03:20:26,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633748201] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:26,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722178808] [2025-01-09 03:20:26,178 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-09 03:20:26,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:26,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:26,180 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:20:26,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-09 03:20:26,216 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 183 statements into 2 equivalence classes. [2025-01-09 03:20:26,245 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 158 of 183 statements. [2025-01-09 03:20:26,246 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-09 03:20:26,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:26,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-09 03:20:26,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 264 proven. 184 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2025-01-09 03:20:26,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 124 proven. 184 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2025-01-09 03:20:26,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722178808] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:26,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:26,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 14 [2025-01-09 03:20:26,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857259754] [2025-01-09 03:20:26,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:26,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-09 03:20:26,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:26,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-09 03:20:26,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2025-01-09 03:20:26,638 INFO L87 Difference]: Start difference. First operand 2563 states and 3604 transitions. Second operand has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) [2025-01-09 03:20:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:28,226 INFO L93 Difference]: Finished difference Result 5369 states and 7628 transitions. [2025-01-09 03:20:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2025-01-09 03:20:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) Word has length 183 [2025-01-09 03:20:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:28,265 INFO L225 Difference]: With dead ends: 5369 [2025-01-09 03:20:28,268 INFO L226 Difference]: Without dead ends: 4029 [2025-01-09 03:20:28,273 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 382 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=373, Invalid=1883, Unknown=0, NotChecked=0, Total=2256 [2025-01-09 03:20:28,273 INFO L435 NwaCegarLoop]: 229 mSDtfsCounter, 230 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:28,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1832 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-01-09 03:20:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4029 states. [2025-01-09 03:20:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4029 to 3539. [2025-01-09 03:20:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3539 states, 2674 states have (on average 1.236724008975318) internal successors, (3307), 2725 states have internal predecessors, (3307), 841 states have call successors, (841), 24 states have call predecessors, (841), 23 states have return successors, (840), 789 states have call predecessors, (840), 840 states have call successors, (840) [2025-01-09 03:20:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 4988 transitions. [2025-01-09 03:20:28,941 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 4988 transitions. Word has length 183 [2025-01-09 03:20:28,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:28,941 INFO L471 AbstractCegarLoop]: Abstraction has 3539 states and 4988 transitions. [2025-01-09 03:20:28,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 14 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) [2025-01-09 03:20:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 4988 transitions. [2025-01-09 03:20:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-01-09 03:20:28,951 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:28,951 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 10, 9, 9, 9, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:28,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-01-09 03:20:29,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-09 03:20:29,155 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:29,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:29,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1364236652, now seen corresponding path program 5 times [2025-01-09 03:20:29,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:29,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895699958] [2025-01-09 03:20:29,155 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:20:29,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:29,165 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 183 statements into 12 equivalence classes. [2025-01-09 03:20:29,198 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 138 of 183 statements. [2025-01-09 03:20:29,198 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-01-09 03:20:29,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2025-01-09 03:20:29,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:29,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895699958] [2025-01-09 03:20:29,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895699958] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:29,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662221542] [2025-01-09 03:20:29,326 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-09 03:20:29,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:29,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:29,328 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:20:29,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-09 03:20:29,358 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 183 statements into 12 equivalence classes. [2025-01-09 03:20:29,421 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 138 of 183 statements. [2025-01-09 03:20:29,421 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-01-09 03:20:29,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:29,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-01-09 03:20:29,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 516 proven. 84 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2025-01-09 03:20:29,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 226 proven. 84 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2025-01-09 03:20:29,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662221542] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:29,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:29,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-01-09 03:20:29,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900607701] [2025-01-09 03:20:29,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:29,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-09 03:20:29,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:29,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-09 03:20:29,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2025-01-09 03:20:29,714 INFO L87 Difference]: Start difference. First operand 3539 states and 4988 transitions. Second operand has 16 states, 16 states have (on average 7.8125) internal successors, (125), 16 states have internal predecessors, (125), 16 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 16 states have call predecessors, (40), 16 states have call successors, (40) [2025-01-09 03:20:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:20:31,498 INFO L93 Difference]: Finished difference Result 6211 states and 8847 transitions. [2025-01-09 03:20:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-01-09 03:20:31,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.8125) internal successors, (125), 16 states have internal predecessors, (125), 16 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 16 states have call predecessors, (40), 16 states have call successors, (40) Word has length 183 [2025-01-09 03:20:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:20:31,518 INFO L225 Difference]: With dead ends: 6211 [2025-01-09 03:20:31,518 INFO L226 Difference]: Without dead ends: 4843 [2025-01-09 03:20:31,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2025-01-09 03:20:31,522 INFO L435 NwaCegarLoop]: 153 mSDtfsCounter, 261 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-01-09 03:20:31,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1273 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-01-09 03:20:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4843 states. [2025-01-09 03:20:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4843 to 4360. [2025-01-09 03:20:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4360 states, 3296 states have (on average 1.2360436893203883) internal successors, (4074), 3364 states have internal predecessors, (4074), 1040 states have call successors, (1040), 24 states have call predecessors, (1040), 23 states have return successors, (1039), 971 states have call predecessors, (1039), 1039 states have call successors, (1039) [2025-01-09 03:20:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4360 states to 4360 states and 6153 transitions. [2025-01-09 03:20:32,289 INFO L78 Accepts]: Start accepts. Automaton has 4360 states and 6153 transitions. Word has length 183 [2025-01-09 03:20:32,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:20:32,290 INFO L471 AbstractCegarLoop]: Abstraction has 4360 states and 6153 transitions. [2025-01-09 03:20:32,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.8125) internal successors, (125), 16 states have internal predecessors, (125), 16 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 16 states have call predecessors, (40), 16 states have call successors, (40) [2025-01-09 03:20:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4360 states and 6153 transitions. [2025-01-09 03:20:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2025-01-09 03:20:32,303 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:20:32,303 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 10, 10, 10, 7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:20:32,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-09 03:20:32,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:32,522 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:20:32,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:20:32,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1644605314, now seen corresponding path program 6 times [2025-01-09 03:20:32,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:20:32,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033907134] [2025-01-09 03:20:32,523 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 03:20:32,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:20:32,529 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 183 statements into 12 equivalence classes. [2025-01-09 03:20:32,577 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 183 of 183 statements. [2025-01-09 03:20:32,577 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-01-09 03:20:32,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 60 proven. 284 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2025-01-09 03:20:33,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:20:33,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033907134] [2025-01-09 03:20:33,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033907134] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:20:33,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774176491] [2025-01-09 03:20:33,260 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-09 03:20:33,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:20:33,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:20:33,262 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:20:33,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-09 03:20:33,292 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 183 statements into 12 equivalence classes. [2025-01-09 03:20:33,559 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 183 of 183 statements. [2025-01-09 03:20:33,559 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-01-09 03:20:33,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:20:33,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-01-09 03:20:33,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:20:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2025-01-09 03:20:33,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:20:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 80 proven. 252 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2025-01-09 03:20:34,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774176491] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:20:34,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:20:34,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11, 11] total 43 [2025-01-09 03:20:34,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19582746] [2025-01-09 03:20:34,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:20:34,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2025-01-09 03:20:34,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:20:34,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2025-01-09 03:20:34,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2025-01-09 03:20:34,140 INFO L87 Difference]: Start difference. First operand 4360 states and 6153 transitions. Second operand has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 43 states have internal predecessors, (190), 41 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (58), 40 states have call predecessors, (58), 40 states have call successors, (58) [2025-01-09 03:21:08,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:21:08,253 INFO L93 Difference]: Finished difference Result 9304 states and 13413 transitions. [2025-01-09 03:21:08,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 944 states. [2025-01-09 03:21:08,254 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 43 states have internal predecessors, (190), 41 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (58), 40 states have call predecessors, (58), 40 states have call successors, (58) Word has length 183 [2025-01-09 03:21:08,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:21:08,295 INFO L225 Difference]: With dead ends: 9304 [2025-01-09 03:21:08,295 INFO L226 Difference]: Without dead ends: 7803 [2025-01-09 03:21:08,426 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1300 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 952 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436381 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=58756, Invalid=850406, Unknown=0, NotChecked=0, Total=909162 [2025-01-09 03:21:08,428 INFO L435 NwaCegarLoop]: 364 mSDtfsCounter, 1754 mSDsluCounter, 5322 mSDsCounter, 0 mSdLazyCounter, 4913 mSolverCounterSat, 1015 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1760 SdHoareTripleChecker+Valid, 5686 SdHoareTripleChecker+Invalid, 5928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1015 IncrementalHoareTripleChecker+Valid, 4913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2025-01-09 03:21:08,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1760 Valid, 5686 Invalid, 5928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1015 Valid, 4913 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2025-01-09 03:21:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7803 states. [2025-01-09 03:21:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7803 to 6759. [2025-01-09 03:21:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6759 states, 5091 states have (on average 1.2158711451581221) internal successors, (6190), 5202 states have internal predecessors, (6190), 1644 states have call successors, (1644), 24 states have call predecessors, (1644), 23 states have return successors, (1643), 1532 states have call predecessors, (1643), 1643 states have call successors, (1643) [2025-01-09 03:21:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6759 states to 6759 states and 9477 transitions. [2025-01-09 03:21:09,845 INFO L78 Accepts]: Start accepts. Automaton has 6759 states and 9477 transitions. Word has length 183 [2025-01-09 03:21:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:21:09,846 INFO L471 AbstractCegarLoop]: Abstraction has 6759 states and 9477 transitions. [2025-01-09 03:21:09,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.4186046511627906) internal successors, (190), 43 states have internal predecessors, (190), 41 states have call successors, (59), 2 states have call predecessors, (59), 1 states have return successors, (58), 40 states have call predecessors, (58), 40 states have call successors, (58) [2025-01-09 03:21:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 6759 states and 9477 transitions. [2025-01-09 03:21:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2025-01-09 03:21:09,864 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:21:09,864 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 10, 10, 10, 10, 8, 7, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:21:09,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-01-09 03:21:10,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:21:10,066 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:21:10,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:21:10,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1082570555, now seen corresponding path program 3 times [2025-01-09 03:21:10,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:21:10,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112035262] [2025-01-09 03:21:10,067 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:21:10,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:21:10,075 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 189 statements into 12 equivalence classes. [2025-01-09 03:21:10,136 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 189 of 189 statements. [2025-01-09 03:21:10,143 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-01-09 03:21:10,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:21:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2025-01-09 03:21:10,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:21:10,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112035262] [2025-01-09 03:21:10,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112035262] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:21:10,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026321135] [2025-01-09 03:21:10,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-09 03:21:10,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:21:10,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:21:10,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:21:10,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-09 03:21:10,995 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 189 statements into 12 equivalence classes. [2025-01-09 03:21:11,143 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) and asserted 189 of 189 statements. [2025-01-09 03:21:11,144 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2025-01-09 03:21:11,144 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:21:11,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 45 conjuncts are in the unsatisfiable core [2025-01-09 03:21:11,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:21:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 1142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:21:11,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:21:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 50 proven. 302 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2025-01-09 03:21:12,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026321135] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:21:12,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:21:12,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 25] total 50 [2025-01-09 03:21:12,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928201245] [2025-01-09 03:21:12,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:21:12,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2025-01-09 03:21:12,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:21:12,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2025-01-09 03:21:12,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1123, Invalid=1327, Unknown=0, NotChecked=0, Total=2450 [2025-01-09 03:21:12,013 INFO L87 Difference]: Start difference. First operand 6759 states and 9477 transitions. Second operand has 50 states, 50 states have (on average 4.34) internal successors, (217), 50 states have internal predecessors, (217), 45 states have call successors, (70), 24 states have call predecessors, (70), 23 states have return successors, (69), 44 states have call predecessors, (69), 44 states have call successors, (69) [2025-01-09 03:21:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:21:19,907 INFO L93 Difference]: Finished difference Result 30413 states and 47175 transitions. [2025-01-09 03:21:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2025-01-09 03:21:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.34) internal successors, (217), 50 states have internal predecessors, (217), 45 states have call successors, (70), 24 states have call predecessors, (70), 23 states have return successors, (69), 44 states have call predecessors, (69), 44 states have call successors, (69) Word has length 189 [2025-01-09 03:21:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:21:20,015 INFO L225 Difference]: With dead ends: 30413 [2025-01-09 03:21:20,015 INFO L226 Difference]: Without dead ends: 28406 [2025-01-09 03:21:20,029 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2864, Invalid=4968, Unknown=0, NotChecked=0, Total=7832 [2025-01-09 03:21:20,030 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 926 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 03:21:20,030 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 643 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 03:21:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28406 states. [2025-01-09 03:21:26,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28406 to 27762. [2025-01-09 03:21:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27762 states, 20868 states have (on average 1.2925052712286755) internal successors, (26972), 21018 states have internal predecessors, (26972), 6848 states have call successors, (6848), 46 states have call predecessors, (6848), 45 states have return successors, (6847), 6697 states have call predecessors, (6847), 6847 states have call successors, (6847) [2025-01-09 03:21:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27762 states to 27762 states and 40667 transitions. [2025-01-09 03:21:27,052 INFO L78 Accepts]: Start accepts. Automaton has 27762 states and 40667 transitions. Word has length 189 [2025-01-09 03:21:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-09 03:21:27,053 INFO L471 AbstractCegarLoop]: Abstraction has 27762 states and 40667 transitions. [2025-01-09 03:21:27,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.34) internal successors, (217), 50 states have internal predecessors, (217), 45 states have call successors, (70), 24 states have call predecessors, (70), 23 states have return successors, (69), 44 states have call predecessors, (69), 44 states have call successors, (69) [2025-01-09 03:21:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 27762 states and 40667 transitions. [2025-01-09 03:21:27,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2025-01-09 03:21:27,069 INFO L210 NwaCegarLoop]: Found error trace [2025-01-09 03:21:27,069 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 10, 10, 10, 10, 8, 8, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-09 03:21:27,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-01-09 03:21:27,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:21:27,270 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-01-09 03:21:27,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-09 03:21:27,271 INFO L85 PathProgramCache]: Analyzing trace with hash -420588408, now seen corresponding path program 2 times [2025-01-09 03:21:27,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-09 03:21:27,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078093591] [2025-01-09 03:21:27,271 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:21:27,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-09 03:21:27,277 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 195 statements into 2 equivalence classes. [2025-01-09 03:21:27,292 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 195 of 195 statements. [2025-01-09 03:21:27,292 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:21:27,292 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:21:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2025-01-09 03:21:27,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-09 03:21:27,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078093591] [2025-01-09 03:21:27,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078093591] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-09 03:21:27,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315465011] [2025-01-09 03:21:27,835 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-09 03:21:27,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-09 03:21:27,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-09 03:21:27,837 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-09 03:21:27,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-09 03:21:27,870 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 195 statements into 2 equivalence classes. [2025-01-09 03:21:27,905 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 195 of 195 statements. [2025-01-09 03:21:27,905 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-09 03:21:27,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-09 03:21:27,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-01-09 03:21:27,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-09 03:21:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 1248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-01-09 03:21:28,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-09 03:21:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 44 proven. 324 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2025-01-09 03:21:28,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315465011] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-09 03:21:28,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-09 03:21:28,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 26] total 51 [2025-01-09 03:21:28,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448844164] [2025-01-09 03:21:28,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-09 03:21:28,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2025-01-09 03:21:28,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-09 03:21:28,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2025-01-09 03:21:28,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=1391, Unknown=0, NotChecked=0, Total=2550 [2025-01-09 03:21:28,776 INFO L87 Difference]: Start difference. First operand 27762 states and 40667 transitions. Second operand has 51 states, 51 states have (on average 4.352941176470588) internal successors, (222), 51 states have internal predecessors, (222), 47 states have call successors, (73), 25 states have call predecessors, (73), 24 states have return successors, (72), 46 states have call predecessors, (72), 46 states have call successors, (72) [2025-01-09 03:21:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-09 03:21:37,113 INFO L93 Difference]: Finished difference Result 30174 states and 44286 transitions. [2025-01-09 03:21:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2025-01-09 03:21:37,114 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.352941176470588) internal successors, (222), 51 states have internal predecessors, (222), 47 states have call successors, (73), 25 states have call predecessors, (73), 24 states have return successors, (72), 46 states have call predecessors, (72), 46 states have call successors, (72) Word has length 195 [2025-01-09 03:21:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-09 03:21:37,207 INFO L225 Difference]: With dead ends: 30174 [2025-01-09 03:21:37,207 INFO L226 Difference]: Without dead ends: 30027 [2025-01-09 03:21:37,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3946, Invalid=8486, Unknown=0, NotChecked=0, Total=12432 [2025-01-09 03:21:37,217 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 808 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-01-09 03:21:37,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 624 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-01-09 03:21:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30027 states.