./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.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 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:08:34,315 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:08:34,365 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:08:34,372 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:08:34,375 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:08:34,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:08:34,389 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:08:34,389 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:08:34,389 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:08:34,389 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:08:34,389 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:08:34,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:08:34,389 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:08:34,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:08:34,390 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:08:34,390 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:08:34,390 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:08:34,390 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:08:34,390 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:08:34,390 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:08:34,390 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:08:34,390 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:08:34,390 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:08:34,390 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:08:34,390 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:08:34,391 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:08:34,391 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:08:34,391 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:08:34,391 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:08:34,391 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:08:34,391 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:08:34,391 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:08:34,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:08:34,391 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:08:34,391 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:08:34,391 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:08:34,391 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:08:34,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:08:34,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:08:34,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:08:34,392 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:08:34,392 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:08:34,392 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:08:34,392 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 -> 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c [2025-02-05 15:08:34,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:08:34,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:08:34,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:08:34,601 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:08:34,601 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:08:34,602 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2025-02-05 15:08:35,750 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/87f541e3a/73db62438e1e49cf99fd9a4145bff28d/FLAGb3d351069 [2025-02-05 15:08:36,003 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:08:36,004 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2025-02-05 15:08:36,009 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/87f541e3a/73db62438e1e49cf99fd9a4145bff28d/FLAGb3d351069 [2025-02-05 15:08:36,317 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/87f541e3a/73db62438e1e49cf99fd9a4145bff28d [2025-02-05 15:08:36,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:08:36,320 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:08:36,322 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:08:36,322 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:08:36,326 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:08:36,327 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,327 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d08bdda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36, skipping insertion in model container [2025-02-05 15:08:36,328 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,340 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:08:36,442 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/egcd2-ll_unwindbound100.c[490,503] [2025-02-05 15:08:36,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:08:36,465 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:08:36,473 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/egcd2-ll_unwindbound100.c[490,503] [2025-02-05 15:08:36,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:08:36,491 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:08:36,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36 WrapperNode [2025-02-05 15:08:36,491 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:08:36,492 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:08:36,493 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:08:36,493 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:08:36,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,502 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,511 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2025-02-05 15:08:36,513 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:08:36,513 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:08:36,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:08:36,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:08:36,518 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,523 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,532 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-05 15:08:36,532 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,533 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,535 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,538 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,538 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,539 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,542 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:08:36,543 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:08:36,543 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:08:36,543 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:08:36,544 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (1/1) ... [2025-02-05 15:08:36,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:08:36,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:36,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-05 15:08:36,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-05 15:08:36,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:08:36,585 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-05 15:08:36,586 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-05 15:08:36,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:08:36,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:08:36,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:08:36,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 15:08:36,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 15:08:36,632 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:08:36,634 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:08:36,762 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2025-02-05 15:08:36,762 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:08:36,768 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:08:36,768 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:08:36,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:08:36 BoogieIcfgContainer [2025-02-05 15:08:36,769 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:08:36,770 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:08:36,771 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:08:36,774 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:08:36,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:08:36" (1/3) ... [2025-02-05 15:08:36,775 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758efdaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:08:36, skipping insertion in model container [2025-02-05 15:08:36,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:08:36" (2/3) ... [2025-02-05 15:08:36,775 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@758efdaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:08:36, skipping insertion in model container [2025-02-05 15:08:36,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:08:36" (3/3) ... [2025-02-05 15:08:36,776 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2025-02-05 15:08:36,786 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:08:36,787 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll_unwindbound100.c that has 3 procedures, 34 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-05 15:08:36,821 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:08:36,829 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;@2709a791, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:08:36,829 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:08:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-05 15:08:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-05 15:08:36,837 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:36,837 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:36,838 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:36,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:36,842 INFO L85 PathProgramCache]: Analyzing trace with hash 100709880, now seen corresponding path program 1 times [2025-02-05 15:08:36,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:36,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476978080] [2025-02-05 15:08:36,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:36,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:36,908 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-05 15:08:36,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 15:08:36,922 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:36,922 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 15:08:36,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:36,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476978080] [2025-02-05 15:08:36,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476978080] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:36,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102917567] [2025-02-05 15:08:36,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:36,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:36,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:36,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:36,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-05 15:08:37,034 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-05 15:08:37,068 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-05 15:08:37,068 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:37,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:37,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 15:08:37,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 15:08:37,086 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:37,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102917567] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:37,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:37,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 15:08:37,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746944391] [2025-02-05 15:08:37,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:37,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 15:08:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:37,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 15:08:37,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:08:37,113 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:08:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:37,134 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2025-02-05 15:08:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 15:08:37,136 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2025-02-05 15:08:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:37,141 INFO L225 Difference]: With dead ends: 65 [2025-02-05 15:08:37,141 INFO L226 Difference]: Without dead ends: 30 [2025-02-05 15:08:37,144 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:08:37,148 INFO L435 NwaCegarLoop]: 45 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, 45 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 [2025-02-05 15:08:37,150 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:37,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-02-05 15:08:37,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2025-02-05 15:08:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-05 15:08:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2025-02-05 15:08:37,177 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2025-02-05 15:08:37,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:37,177 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2025-02-05 15:08:37,177 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:08:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2025-02-05 15:08:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-05 15:08:37,179 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:37,179 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:37,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:08:37,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-05 15:08:37,382 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:37,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:37,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1726789354, now seen corresponding path program 1 times [2025-02-05 15:08:37,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:37,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862830757] [2025-02-05 15:08:37,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:37,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:37,390 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-05 15:08:37,400 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-05 15:08:37,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:37,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:08:37,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:37,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862830757] [2025-02-05 15:08:37,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862830757] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:37,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:37,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 15:08:37,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964885820] [2025-02-05 15:08:37,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:37,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 15:08:37,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:37,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 15:08:37,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-05 15:08:37,468 INFO L87 Difference]: Start difference. First operand 30 states and 41 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:37,484 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2025-02-05 15:08:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-05 15:08:37,489 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2025-02-05 15:08:37,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:37,493 INFO L225 Difference]: With dead ends: 40 [2025-02-05 15:08:37,493 INFO L226 Difference]: Without dead ends: 32 [2025-02-05 15:08:37,494 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 [2025-02-05 15:08:37,494 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:37,494 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:37,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-05 15:08:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-05 15:08:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-05 15:08:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2025-02-05 15:08:37,501 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2025-02-05 15:08:37,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:37,502 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2025-02-05 15:08:37,502 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:37,502 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2025-02-05 15:08:37,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-05 15:08:37,503 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:37,503 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:37,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-05 15:08:37,503 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:37,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2044305484, now seen corresponding path program 1 times [2025-02-05 15:08:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:37,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918196552] [2025-02-05 15:08:37,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:37,512 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-05 15:08:37,533 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 15:08:37,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:37,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 15:08:37,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:37,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918196552] [2025-02-05 15:08:37,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918196552] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:37,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325637478] [2025-02-05 15:08:37,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:37,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:37,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:37,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:37,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-05 15:08:37,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-05 15:08:37,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 15:08:37,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:37,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:37,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:08:37,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:08:37,801 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:37,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325637478] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:37,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:37,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2025-02-05 15:08:37,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635900195] [2025-02-05 15:08:37,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:37,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 15:08:37,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:37,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 15:08:37,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:37,803 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:08:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:37,871 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2025-02-05 15:08:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:08:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2025-02-05 15:08:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:37,872 INFO L225 Difference]: With dead ends: 49 [2025-02-05 15:08:37,872 INFO L226 Difference]: Without dead ends: 47 [2025-02-05 15:08:37,872 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:08:37,873 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:37,873 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:37,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2025-02-05 15:08:37,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2025-02-05 15:08:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 states have internal predecessors, (34), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2025-02-05 15:08:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2025-02-05 15:08:37,887 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 30 [2025-02-05 15:08:37,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:37,887 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2025-02-05 15:08:37,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:08:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2025-02-05 15:08:37,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-05 15:08:37,888 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:37,888 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:37,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:38,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:38,089 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:38,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:38,090 INFO L85 PathProgramCache]: Analyzing trace with hash -886820372, now seen corresponding path program 1 times [2025-02-05 15:08:38,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:38,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140302463] [2025-02-05 15:08:38,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:38,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:38,095 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 15:08:38,102 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 15:08:38,103 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:38,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:38,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78991669] [2025-02-05 15:08:38,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:38,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:38,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:38,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:38,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-05 15:08:38,144 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-05 15:08:38,157 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-05 15:08:38,157 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:38,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:38,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:08:38,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:08:38,186 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:38,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:38,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140302463] [2025-02-05 15:08:38,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:38,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78991669] [2025-02-05 15:08:38,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78991669] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:38,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:38,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:38,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031014470] [2025-02-05 15:08:38,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:38,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:38,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:38,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:38,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:38,188 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:38,224 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2025-02-05 15:08:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:38,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2025-02-05 15:08:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:38,226 INFO L225 Difference]: With dead ends: 66 [2025-02-05 15:08:38,226 INFO L226 Difference]: Without dead ends: 64 [2025-02-05 15:08:38,227 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:08:38,231 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:38,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-05 15:08:38,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2025-02-05 15:08:38,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2025-02-05 15:08:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2025-02-05 15:08:38,242 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 32 [2025-02-05 15:08:38,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:38,242 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2025-02-05 15:08:38,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2025-02-05 15:08:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-05 15:08:38,243 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:38,243 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:38,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 15:08:38,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:38,447 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:38,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:38,447 INFO L85 PathProgramCache]: Analyzing trace with hash -276176331, now seen corresponding path program 1 times [2025-02-05 15:08:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:38,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878172502] [2025-02-05 15:08:38,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:38,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:38,452 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-05 15:08:38,461 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 15:08:38,461 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:38,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-05 15:08:38,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:38,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878172502] [2025-02-05 15:08:38,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878172502] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:38,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216283456] [2025-02-05 15:08:38,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:38,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:38,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:38,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:38,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-05 15:08:38,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-05 15:08:38,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 15:08:38,603 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:38,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:38,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 15:08:38,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:08:38,683 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:38,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216283456] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:38,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:38,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2025-02-05 15:08:38,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642433854] [2025-02-05 15:08:38,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:38,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:38,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:38,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:38,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:08:38,685 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 15:08:38,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:38,719 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2025-02-05 15:08:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:38,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2025-02-05 15:08:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:38,720 INFO L225 Difference]: With dead ends: 63 [2025-02-05 15:08:38,720 INFO L226 Difference]: Without dead ends: 59 [2025-02-05 15:08:38,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:38,721 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:38,721 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 142 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-05 15:08:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2025-02-05 15:08:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:08:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2025-02-05 15:08:38,727 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 35 [2025-02-05 15:08:38,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:38,728 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2025-02-05 15:08:38,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 15:08:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2025-02-05 15:08:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2025-02-05 15:08:38,728 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:38,728 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:38,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:38,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:38,933 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:38,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:38,933 INFO L85 PathProgramCache]: Analyzing trace with hash -247836027, now seen corresponding path program 1 times [2025-02-05 15:08:38,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:38,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149299906] [2025-02-05 15:08:38,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:38,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:38,938 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-02-05 15:08:38,946 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-02-05 15:08:38,946 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:38,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:08:39,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:39,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149299906] [2025-02-05 15:08:39,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149299906] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:39,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:39,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:39,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271068169] [2025-02-05 15:08:39,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:39,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:39,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:39,018 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:39,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:39,018 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:39,041 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2025-02-05 15:08:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2025-02-05 15:08:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:39,042 INFO L225 Difference]: With dead ends: 84 [2025-02-05 15:08:39,043 INFO L226 Difference]: Without dead ends: 58 [2025-02-05 15:08:39,043 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 [2025-02-05 15:08:39,044 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:39,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-02-05 15:08:39,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2025-02-05 15:08:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 39 states have internal predecessors, (44), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:08:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2025-02-05 15:08:39,057 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 35 [2025-02-05 15:08:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:39,057 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2025-02-05 15:08:39,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:08:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2025-02-05 15:08:39,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-02-05 15:08:39,058 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:39,058 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:39,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-05 15:08:39,058 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:39,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:39,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1535941731, now seen corresponding path program 1 times [2025-02-05 15:08:39,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:39,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654258966] [2025-02-05 15:08:39,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:39,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:39,064 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-02-05 15:08:39,078 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 15:08:39,078 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:39,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:39,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654712134] [2025-02-05 15:08:39,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:39,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:39,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:39,081 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:39,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-05 15:08:39,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-02-05 15:08:39,129 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-02-05 15:08:39,129 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:39,129 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:39,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:08:39,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-05 15:08:39,278 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:08:39,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:39,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654258966] [2025-02-05 15:08:39,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:39,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654712134] [2025-02-05 15:08:39,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654712134] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:39,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:39,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:39,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357490068] [2025-02-05 15:08:39,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:39,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:39,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:39,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:39,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:39,280 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 15:08:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:39,338 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2025-02-05 15:08:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:08:39,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2025-02-05 15:08:39,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:39,339 INFO L225 Difference]: With dead ends: 65 [2025-02-05 15:08:39,341 INFO L226 Difference]: Without dead ends: 63 [2025-02-05 15:08:39,341 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-05 15:08:39,342 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:39,342 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:39,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-05 15:08:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2025-02-05 15:08:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.205128205128205) internal successors, (47), 42 states have internal predecessors, (47), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2025-02-05 15:08:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2025-02-05 15:08:39,363 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 47 [2025-02-05 15:08:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:39,363 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2025-02-05 15:08:39,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2025-02-05 15:08:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2025-02-05 15:08:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2025-02-05 15:08:39,364 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:39,364 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2025-02-05 15:08:39,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:39,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:39,569 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:39,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:39,571 INFO L85 PathProgramCache]: Analyzing trace with hash 101798249, now seen corresponding path program 1 times [2025-02-05 15:08:39,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:39,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762645414] [2025-02-05 15:08:39,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:39,579 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 15:08:39,593 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 15:08:39,593 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:39,593 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:39,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155236911] [2025-02-05 15:08:39,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:39,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:39,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:39,602 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:39,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-05 15:08:39,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-02-05 15:08:39,648 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-02-05 15:08:39,649 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:39,649 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:39,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:08:39,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:39,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:39,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:39,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762645414] [2025-02-05 15:08:39,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:39,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155236911] [2025-02-05 15:08:39,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155236911] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:39,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:08:39,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2025-02-05 15:08:39,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944876618] [2025-02-05 15:08:39,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:39,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:08:39,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:39,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:08:39,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:08:39,830 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 15:08:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:39,918 INFO L93 Difference]: Finished difference Result 92 states and 127 transitions. [2025-02-05 15:08:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:08:39,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2025-02-05 15:08:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:39,920 INFO L225 Difference]: With dead ends: 92 [2025-02-05 15:08:39,920 INFO L226 Difference]: Without dead ends: 90 [2025-02-05 15:08:39,921 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:08:39,921 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:39,921 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 219 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-02-05 15:08:39,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2025-02-05 15:08:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-02-05 15:08:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2025-02-05 15:08:39,932 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 55 [2025-02-05 15:08:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:39,933 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2025-02-05 15:08:39,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-02-05 15:08:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2025-02-05 15:08:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-05 15:08:39,933 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:39,934 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2025-02-05 15:08:39,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:40,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-05 15:08:40,138 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:40,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:40,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1244697335, now seen corresponding path program 1 times [2025-02-05 15:08:40,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:40,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751790225] [2025-02-05 15:08:40,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:40,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:40,144 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-05 15:08:40,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 15:08:40,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:40,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:40,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:40,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751790225] [2025-02-05 15:08:40,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751790225] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:40,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831327369] [2025-02-05 15:08:40,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:40,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:40,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:40,211 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:40,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-05 15:08:40,235 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-02-05 15:08:40,249 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-02-05 15:08:40,249 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:40,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:40,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:08:40,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:40,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:40,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831327369] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:40,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:08:40,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-02-05 15:08:40,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097716338] [2025-02-05 15:08:40,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:40,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:08:40,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:40,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:08:40,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:40,395 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-02-05 15:08:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:40,530 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2025-02-05 15:08:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:08:40,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 56 [2025-02-05 15:08:40,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:40,532 INFO L225 Difference]: With dead ends: 211 [2025-02-05 15:08:40,532 INFO L226 Difference]: Without dead ends: 203 [2025-02-05 15:08:40,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:08:40,532 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 81 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:40,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 194 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:40,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2025-02-05 15:08:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2025-02-05 15:08:40,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2025-02-05 15:08:40,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2025-02-05 15:08:40,563 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2025-02-05 15:08:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:40,565 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2025-02-05 15:08:40,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-02-05 15:08:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2025-02-05 15:08:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2025-02-05 15:08:40,566 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:40,566 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2025-02-05 15:08:40,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-05 15:08:40,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:40,767 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:40,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash 15645217, now seen corresponding path program 1 times [2025-02-05 15:08:40,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:40,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182629877] [2025-02-05 15:08:40,768 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:40,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-05 15:08:40,779 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 15:08:40,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:40,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-05 15:08:40,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:40,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182629877] [2025-02-05 15:08:40,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182629877] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:40,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104895249] [2025-02-05 15:08:40,900 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:40,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:40,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:40,901 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-05 15:08:40,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-05 15:08:40,934 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 57 statements into 1 equivalence classes. [2025-02-05 15:08:40,949 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 57 of 57 statements. [2025-02-05 15:08:40,949 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:40,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:40,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-05 15:08:40,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-05 15:08:41,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-05 15:08:41,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104895249] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:41,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:08:41,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2025-02-05 15:08:41,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852750520] [2025-02-05 15:08:41,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:41,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-05 15:08:41,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:41,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-05 15:08:41,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:08:41,140 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 15:08:41,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:41,287 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2025-02-05 15:08:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:08:41,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2025-02-05 15:08:41,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:41,290 INFO L225 Difference]: With dead ends: 279 [2025-02-05 15:08:41,290 INFO L226 Difference]: Without dead ends: 259 [2025-02-05 15:08:41,290 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:08:41,291 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:41,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 249 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2025-02-05 15:08:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2025-02-05 15:08:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2025-02-05 15:08:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2025-02-05 15:08:41,340 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2025-02-05 15:08:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:41,340 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2025-02-05 15:08:41,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2025-02-05 15:08:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2025-02-05 15:08:41,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-02-05 15:08:41,342 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:41,342 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2025-02-05 15:08:41,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-05 15:08:41,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:41,543 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:41,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:41,544 INFO L85 PathProgramCache]: Analyzing trace with hash -351822558, now seen corresponding path program 1 times [2025-02-05 15:08:41,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:41,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792861890] [2025-02-05 15:08:41,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:41,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:41,550 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-05 15:08:41,559 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-05 15:08:41,559 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:41,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:41,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:41,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792861890] [2025-02-05 15:08:41,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792861890] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:41,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022188610] [2025-02-05 15:08:41,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:41,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:41,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:41,612 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) [2025-02-05 15:08:41,614 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 [2025-02-05 15:08:41,636 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-02-05 15:08:41,650 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-02-05 15:08:41,651 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:41,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:41,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-02-05 15:08:41,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:41,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-05 15:08:41,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022188610] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:41,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:08:41,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2025-02-05 15:08:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113672811] [2025-02-05 15:08:41,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:41,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:08:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:41,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:08:41,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:08:41,773 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-02-05 15:08:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:41,889 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2025-02-05 15:08:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-05 15:08:41,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 59 [2025-02-05 15:08:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:41,891 INFO L225 Difference]: With dead ends: 344 [2025-02-05 15:08:41,891 INFO L226 Difference]: Without dead ends: 248 [2025-02-05 15:08:41,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2025-02-05 15:08:41,892 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 68 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:41,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 179 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2025-02-05 15:08:41,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2025-02-05 15:08:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2025-02-05 15:08:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2025-02-05 15:08:41,915 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2025-02-05 15:08:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:41,916 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2025-02-05 15:08:41,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2025-02-05 15:08:41,916 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2025-02-05 15:08:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-02-05 15:08:41,916 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:41,916 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 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] [2025-02-05 15:08:41,925 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 [2025-02-05 15:08:42,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:42,117 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:42,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1287548176, now seen corresponding path program 1 times [2025-02-05 15:08:42,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:42,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342644659] [2025-02-05 15:08:42,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:42,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:42,121 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-02-05 15:08:42,133 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-02-05 15:08:42,136 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:42,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:42,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019922530] [2025-02-05 15:08:42,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:42,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:42,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:42,140 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) [2025-02-05 15:08:42,145 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 [2025-02-05 15:08:42,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-02-05 15:08:42,192 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-02-05 15:08:42,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:42,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:42,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-05 15:08:42,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-05 15:08:42,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:42,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:42,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342644659] [2025-02-05 15:08:42,328 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:42,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019922530] [2025-02-05 15:08:42,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019922530] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:42,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:42,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2025-02-05 15:08:42,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294941690] [2025-02-05 15:08:42,328 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:42,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 15:08:42,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:42,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 15:08:42,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:08:42,329 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-05 15:08:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:42,427 INFO L93 Difference]: Finished difference Result 283 states and 355 transitions. [2025-02-05 15:08:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:08:42,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2025-02-05 15:08:42,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:42,429 INFO L225 Difference]: With dead ends: 283 [2025-02-05 15:08:42,429 INFO L226 Difference]: Without dead ends: 278 [2025-02-05 15:08:42,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-05 15:08:42,430 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 10 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:42,430 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 213 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2025-02-05 15:08:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2025-02-05 15:08:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 183 states have (on average 1.185792349726776) internal successors, (217), 187 states have internal predecessors, (217), 65 states have call successors, (65), 27 states have call predecessors, (65), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-02-05 15:08:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2025-02-05 15:08:42,460 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 64 [2025-02-05 15:08:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:42,460 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2025-02-05 15:08:42,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2025-02-05 15:08:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2025-02-05 15:08:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2025-02-05 15:08:42,461 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:42,461 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1] [2025-02-05 15:08:42,468 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 [2025-02-05 15:08:42,665 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,SelfDestructingSolverStorable11 [2025-02-05 15:08:42,665 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:42,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:42,666 INFO L85 PathProgramCache]: Analyzing trace with hash 691051449, now seen corresponding path program 2 times [2025-02-05 15:08:42,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:42,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837625440] [2025-02-05 15:08:42,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:08:42,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:42,671 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-02-05 15:08:42,679 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-05 15:08:42,679 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:08:42,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:42,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886721621] [2025-02-05 15:08:42,680 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:08:42,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:42,681 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) [2025-02-05 15:08:42,683 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 [2025-02-05 15:08:42,711 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 69 statements into 2 equivalence classes. [2025-02-05 15:08:42,729 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 69 of 69 statements. [2025-02-05 15:08:42,729 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:08:42,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:42,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-05 15:08:42,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-05 15:08:42,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:42,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837625440] [2025-02-05 15:08:42,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886721621] [2025-02-05 15:08:42,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886721621] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:42,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:42,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2025-02-05 15:08:42,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664175852] [2025-02-05 15:08:42,990 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:42,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-05 15:08:42,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:42,990 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-05 15:08:42,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:08:42,991 INFO L87 Difference]: Start difference. First operand 276 states and 343 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2025-02-05 15:08:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:43,118 INFO L93 Difference]: Finished difference Result 291 states and 357 transitions. [2025-02-05 15:08:43,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-05 15:08:43,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 69 [2025-02-05 15:08:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:43,121 INFO L225 Difference]: With dead ends: 291 [2025-02-05 15:08:43,121 INFO L226 Difference]: Without dead ends: 289 [2025-02-05 15:08:43,121 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-02-05 15:08:43,122 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 16 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:43,122 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 228 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:08:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2025-02-05 15:08:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2025-02-05 15:08:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 192 states have (on average 1.1770833333333333) internal successors, (226), 196 states have internal predecessors, (226), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-02-05 15:08:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 352 transitions. [2025-02-05 15:08:43,156 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 352 transitions. Word has length 69 [2025-02-05 15:08:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:43,156 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 352 transitions. [2025-02-05 15:08:43,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2025-02-05 15:08:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 352 transitions. [2025-02-05 15:08:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2025-02-05 15:08:43,157 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:43,157 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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, 1, 1, 1] [2025-02-05 15:08:43,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:43,357 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,SelfDestructingSolverStorable12 [2025-02-05 15:08:43,358 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:43,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:43,358 INFO L85 PathProgramCache]: Analyzing trace with hash 239571152, now seen corresponding path program 3 times [2025-02-05 15:08:43,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:43,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108538122] [2025-02-05 15:08:43,359 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:08:43,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:43,363 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 74 statements into 5 equivalence classes. [2025-02-05 15:08:43,379 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 74 of 74 statements. [2025-02-05 15:08:43,379 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-02-05 15:08:43,380 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:43,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453786685] [2025-02-05 15:08:43,380 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:08:43,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:43,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:43,382 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) [2025-02-05 15:08:43,383 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 [2025-02-05 15:08:43,407 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 74 statements into 5 equivalence classes. [2025-02-05 15:08:43,421 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 54 of 74 statements. [2025-02-05 15:08:43,422 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:08:43,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:43,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-02-05 15:08:43,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-02-05 15:08:43,964 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:44,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:44,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108538122] [2025-02-05 15:08:44,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:44,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453786685] [2025-02-05 15:08:44,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453786685] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:44,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:08:44,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2025-02-05 15:08:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539910099] [2025-02-05 15:08:44,183 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:44,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:08:44,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:44,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:08:44,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2025-02-05 15:08:44,184 INFO L87 Difference]: Start difference. First operand 288 states and 352 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-05 15:08:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:44,391 INFO L93 Difference]: Finished difference Result 303 states and 366 transitions. [2025-02-05 15:08:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-05 15:08:44,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 74 [2025-02-05 15:08:44,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:44,393 INFO L225 Difference]: With dead ends: 303 [2025-02-05 15:08:44,393 INFO L226 Difference]: Without dead ends: 299 [2025-02-05 15:08:44,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2025-02-05 15:08:44,394 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:44,394 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 281 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:08:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2025-02-05 15:08:44,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2025-02-05 15:08:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 200 states have (on average 1.165) internal successors, (233), 203 states have internal predecessors, (233), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2025-02-05 15:08:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 359 transitions. [2025-02-05 15:08:44,425 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 359 transitions. Word has length 74 [2025-02-05 15:08:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:44,425 INFO L471 AbstractCegarLoop]: Abstraction has 298 states and 359 transitions. [2025-02-05 15:08:44,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2025-02-05 15:08:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 359 transitions. [2025-02-05 15:08:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-02-05 15:08:44,426 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:44,426 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:44,432 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 [2025-02-05 15:08:44,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:44,626 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:44,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:44,628 INFO L85 PathProgramCache]: Analyzing trace with hash 852496708, now seen corresponding path program 1 times [2025-02-05 15:08:44,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:44,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647540997] [2025-02-05 15:08:44,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:44,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:44,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 15:08:44,655 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 15:08:44,655 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:44,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:44,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399915263] [2025-02-05 15:08:44,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:44,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:44,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:44,658 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) [2025-02-05 15:08:44,660 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 [2025-02-05 15:08:44,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-02-05 15:08:44,706 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-02-05 15:08:44,706 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:44,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:44,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjuncts are in the unsatisfiable core [2025-02-05 15:08:44,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2025-02-05 15:08:45,182 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:08:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2025-02-05 15:08:45,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:45,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647540997] [2025-02-05 15:08:45,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:08:45,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399915263] [2025-02-05 15:08:45,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399915263] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:08:45,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:08:45,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2025-02-05 15:08:45,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798777952] [2025-02-05 15:08:45,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:45,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-05 15:08:45,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:45,484 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-05 15:08:45,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-02-05 15:08:45,485 INFO L87 Difference]: Start difference. First operand 298 states and 359 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-02-05 15:08:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:47,254 INFO L93 Difference]: Finished difference Result 435 states and 581 transitions. [2025-02-05 15:08:47,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-05 15:08:47,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2025-02-05 15:08:47,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:47,256 INFO L225 Difference]: With dead ends: 435 [2025-02-05 15:08:47,256 INFO L226 Difference]: Without dead ends: 428 [2025-02-05 15:08:47,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2025-02-05 15:08:47,257 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 134 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:47,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 761 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-02-05 15:08:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2025-02-05 15:08:47,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 391. [2025-02-05 15:08:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 256 states have (on average 1.23046875) internal successors, (315), 259 states have internal predecessors, (315), 100 states have call successors, (100), 34 states have call predecessors, (100), 34 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2025-02-05 15:08:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 513 transitions. [2025-02-05 15:08:47,306 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 513 transitions. Word has length 80 [2025-02-05 15:08:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:47,307 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 513 transitions. [2025-02-05 15:08:47,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2025-02-05 15:08:47,307 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 513 transitions. [2025-02-05 15:08:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-02-05 15:08:47,307 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:47,308 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:47,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-05 15:08:47,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:47,508 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:47,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2042434077, now seen corresponding path program 4 times [2025-02-05 15:08:47,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:47,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729890745] [2025-02-05 15:08:47,509 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-05 15:08:47,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:47,513 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 91 statements into 2 equivalence classes. [2025-02-05 15:08:47,524 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 81 of 91 statements. [2025-02-05 15:08:47,528 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-05 15:08:47,529 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-05 15:08:47,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:08:47,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729890745] [2025-02-05 15:08:47,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729890745] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:08:47,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:08:47,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-05 15:08:47,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615524343] [2025-02-05 15:08:47,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:08:47,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:08:47,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:47,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:08:47,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-05 15:08:47,597 INFO L87 Difference]: Start difference. First operand 391 states and 513 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2025-02-05 15:08:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:47,708 INFO L93 Difference]: Finished difference Result 587 states and 831 transitions. [2025-02-05 15:08:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-05 15:08:47,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 91 [2025-02-05 15:08:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:47,711 INFO L225 Difference]: With dead ends: 587 [2025-02-05 15:08:47,711 INFO L226 Difference]: Without dead ends: 462 [2025-02-05 15:08:47,711 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-05 15:08:47,712 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 12 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:47,712 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 186 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:08:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2025-02-05 15:08:47,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 410. [2025-02-05 15:08:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 267 states have (on average 1.2397003745318351) internal successors, (331), 270 states have internal predecessors, (331), 108 states have call successors, (108), 34 states have call predecessors, (108), 34 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2025-02-05 15:08:47,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 545 transitions. [2025-02-05 15:08:47,781 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 545 transitions. Word has length 91 [2025-02-05 15:08:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:47,781 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 545 transitions. [2025-02-05 15:08:47,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2025-02-05 15:08:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 545 transitions. [2025-02-05 15:08:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2025-02-05 15:08:47,783 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:47,783 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:47,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-05 15:08:47,783 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:47,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:47,784 INFO L85 PathProgramCache]: Analyzing trace with hash 777061389, now seen corresponding path program 1 times [2025-02-05 15:08:47,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:47,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893594712] [2025-02-05 15:08:47,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:47,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:47,787 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-02-05 15:08:47,797 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-02-05 15:08:47,797 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:47,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:47,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154908264] [2025-02-05 15:08:47,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:47,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:47,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:47,800 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) [2025-02-05 15:08:47,802 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 [2025-02-05 15:08:47,833 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 97 statements into 1 equivalence classes. [2025-02-05 15:08:47,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 97 of 97 statements. [2025-02-05 15:08:47,862 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:47,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:47,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-02-05 15:08:47,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 68 proven. 39 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2025-02-05 15:08:48,756 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:09:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2025-02-05 15:09:15,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:09:15,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893594712] [2025-02-05 15:09:15,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:09:15,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154908264] [2025-02-05 15:09:15,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154908264] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:09:15,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:09:15,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2025-02-05 15:09:15,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164402180] [2025-02-05 15:09:15,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:09:15,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-05 15:09:15,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:09:15,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-05 15:09:15,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2025-02-05 15:09:15,051 INFO L87 Difference]: Start difference. First operand 410 states and 545 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 21 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2025-02-05 15:09:19,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:09:33,762 WARN L286 SmtUtils]: Spent 13.64s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-05 15:09:47,112 WARN L286 SmtUtils]: Spent 9.43s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-05 15:09:51,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:09:53,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:09:58,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:10:02,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:10:07,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:10:11,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2025-02-05 15:10:18,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []