./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.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 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:34:00,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:34:00,163 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:34:00,167 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:34:00,167 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:34:00,187 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:34:00,187 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:34:00,187 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:34:00,187 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:34:00,187 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:34:00,188 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:34:00,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:34:00,188 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:34:00,188 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:34:00,188 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:34:00,188 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:34:00,188 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:34:00,188 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:34:00,188 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:34:00,189 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:34:00,189 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:34:00,189 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:34:00,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:34:00,189 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:34:00,189 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:34:00,189 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:34:00,189 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:34:00,189 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:34:00,189 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:34:00,189 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:34:00,191 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:34:00,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:34:00,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:34:00,191 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:34:00,191 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:34:00,191 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:34:00,191 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:34:00,192 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:34:00,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:34:00,192 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:34:00,192 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:34:00,192 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:34:00,192 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:34:00,192 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 -> 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 [2025-02-07 20:34:00,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:34:00,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:34:00,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:34:00,468 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:34:00,469 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:34:00,470 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2025-02-07 20:34:01,733 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcd370448/cf7ba7361de9444b976bf4a0884b3601/FLAGc5a9d411d [2025-02-07 20:34:01,996 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:34:01,998 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2025-02-07 20:34:02,005 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcd370448/cf7ba7361de9444b976bf4a0884b3601/FLAGc5a9d411d [2025-02-07 20:34:02,310 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcd370448/cf7ba7361de9444b976bf4a0884b3601 [2025-02-07 20:34:02,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:34:02,313 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:34:02,314 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:34:02,314 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:34:02,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:34:02,319 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,319 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11eb2729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02, skipping insertion in model container [2025-02-07 20:34:02,319 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,333 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:34:02,460 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/egcd-ll_valuebound20.c[489,502] [2025-02-07 20:34:02,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:34:02,493 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:34:02,503 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/egcd-ll_valuebound20.c[489,502] [2025-02-07 20:34:02,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:34:02,528 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:34:02,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02 WrapperNode [2025-02-07 20:34:02,529 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:34:02,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:34:02,530 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:34:02,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:34:02,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,540 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,554 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2025-02-07 20:34:02,555 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:34:02,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:34:02,556 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:34:02,556 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:34:02,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,567 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,579 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 20:34:02,580 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,580 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,583 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,586 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,589 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,590 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:34:02,590 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:34:02,593 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:34:02,593 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:34:02,594 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (1/1) ... [2025-02-07 20:34:02,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:34:02,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:02,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 20:34:02,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 20:34:02,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:34:02,646 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-07 20:34:02,646 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-07 20:34:02,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:34:02,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:34:02,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:34:02,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-07 20:34:02,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-07 20:34:02,691 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:34:02,693 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:34:02,855 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2025-02-07 20:34:02,855 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:34:02,863 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:34:02,863 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:34:02,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:34:02 BoogieIcfgContainer [2025-02-07 20:34:02,863 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:34:02,866 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:34:02,866 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:34:02,870 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:34:02,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:34:02" (1/3) ... [2025-02-07 20:34:02,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c24310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:34:02, skipping insertion in model container [2025-02-07 20:34:02,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:34:02" (2/3) ... [2025-02-07 20:34:02,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c24310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:34:02, skipping insertion in model container [2025-02-07 20:34:02,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:34:02" (3/3) ... [2025-02-07 20:34:02,872 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound20.c [2025-02-07 20:34:02,884 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:34:02,886 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd-ll_valuebound20.c that has 3 procedures, 30 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-07 20:34:02,934 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:34:02,945 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;@1bfd707d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:34:02,945 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:34:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-07 20:34:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-07 20:34:02,956 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:02,956 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:02,957 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:02,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:02,963 INFO L85 PathProgramCache]: Analyzing trace with hash -255659426, now seen corresponding path program 1 times [2025-02-07 20:34:02,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:02,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216056164] [2025-02-07 20:34:02,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:02,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:03,039 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-07 20:34:03,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 20:34:03,056 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:03,057 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 20:34:03,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:03,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216056164] [2025-02-07 20:34:03,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216056164] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:03,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186944448] [2025-02-07 20:34:03,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:03,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:03,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:03,130 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:03,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 20:34:03,179 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-07 20:34:03,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 20:34:03,212 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:03,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:03,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-07 20:34:03,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 20:34:03,232 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:03,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186944448] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:03,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:03,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-07 20:34:03,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256856883] [2025-02-07 20:34:03,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:03,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-07 20:34:03,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:03,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-07 20:34:03,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-07 20:34:03,260 INFO L87 Difference]: Start difference. First operand has 30 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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) [2025-02-07 20:34:03,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:03,280 INFO L93 Difference]: Finished difference Result 58 states and 94 transitions. [2025-02-07 20:34:03,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-07 20:34:03,283 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 [2025-02-07 20:34:03,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:03,287 INFO L225 Difference]: With dead ends: 58 [2025-02-07 20:34:03,287 INFO L226 Difference]: Without dead ends: 27 [2025-02-07 20:34:03,290 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 [2025-02-07 20:34:03,293 INFO L435 NwaCegarLoop]: 40 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, 40 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 [2025-02-07 20:34:03,294 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-07 20:34:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-07 20:34:03,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2025-02-07 20:34:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2025-02-07 20:34:03,329 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 28 [2025-02-07 20:34:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:03,329 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2025-02-07 20:34:03,329 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) [2025-02-07 20:34:03,329 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2025-02-07 20:34:03,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-02-07 20:34:03,330 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:03,330 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:03,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 20:34:03,532 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 [2025-02-07 20:34:03,533 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:03,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:03,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1195386432, now seen corresponding path program 1 times [2025-02-07 20:34:03,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:03,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801972364] [2025-02-07 20:34:03,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:03,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:03,546 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-07 20:34:03,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 20:34:03,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:03,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:03,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519856256] [2025-02-07 20:34:03,574 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:03,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:03,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:03,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:03,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 20:34:03,611 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-02-07 20:34:03,640 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-02-07 20:34:03,640 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:03,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:03,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:34:03,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 20:34:03,745 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:03,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:03,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801972364] [2025-02-07 20:34:03,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:03,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519856256] [2025-02-07 20:34:03,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519856256] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:03,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:03,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:03,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530941663] [2025-02-07 20:34:03,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:03,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:03,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:03,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:03,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:03,749 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2025-02-07 20:34:03,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:03,821 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2025-02-07 20:34:03,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:03,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 28 [2025-02-07 20:34:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:03,823 INFO L225 Difference]: With dead ends: 43 [2025-02-07 20:34:03,823 INFO L226 Difference]: Without dead ends: 41 [2025-02-07 20:34:03,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:34:03,824 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:03,824 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 117 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:03,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2025-02-07 20:34:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2025-02-07 20:34:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2025-02-07 20:34:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 57 transitions. [2025-02-07 20:34:03,841 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 57 transitions. Word has length 28 [2025-02-07 20:34:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:03,841 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 57 transitions. [2025-02-07 20:34:03,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2025-02-07 20:34:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 57 transitions. [2025-02-07 20:34:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-07 20:34:03,842 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:03,842 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] [2025-02-07 20:34:03,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 20:34:04,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:04,043 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:04,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:04,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1205237411, now seen corresponding path program 1 times [2025-02-07 20:34:04,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:04,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066419386] [2025-02-07 20:34:04,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:04,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:04,050 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-07 20:34:04,074 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 20:34:04,074 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:04,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:04,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558968985] [2025-02-07 20:34:04,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:04,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:04,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:04,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 20:34:04,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-07 20:34:04,136 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-07 20:34:04,136 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:04,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:04,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-07 20:34:04,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-07 20:34:04,212 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:04,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:04,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066419386] [2025-02-07 20:34:04,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:04,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558968985] [2025-02-07 20:34:04,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558968985] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:04,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:04,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:04,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798704881] [2025-02-07 20:34:04,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:04,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:04,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:04,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:04,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:04,215 INFO L87 Difference]: Start difference. First operand 40 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-02-07 20:34:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:04,277 INFO L93 Difference]: Finished difference Result 65 states and 97 transitions. [2025-02-07 20:34:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:04,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 33 [2025-02-07 20:34:04,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:04,282 INFO L225 Difference]: With dead ends: 65 [2025-02-07 20:34:04,282 INFO L226 Difference]: Without dead ends: 63 [2025-02-07 20:34:04,283 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:34:04,283 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:04,286 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 119 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-07 20:34:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2025-02-07 20:34:04,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 30 states have internal predecessors, (37), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2025-02-07 20:34:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 82 transitions. [2025-02-07 20:34:04,311 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 82 transitions. Word has length 33 [2025-02-07 20:34:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:04,311 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 82 transitions. [2025-02-07 20:34:04,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2025-02-07 20:34:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 82 transitions. [2025-02-07 20:34:04,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2025-02-07 20:34:04,312 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:04,312 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:04,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 20:34:04,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:04,518 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:04,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:04,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1639908320, now seen corresponding path program 1 times [2025-02-07 20:34:04,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:04,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271115615] [2025-02-07 20:34:04,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:04,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:04,531 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-07 20:34:04,551 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 20:34:04,551 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:04,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:04,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332401975] [2025-02-07 20:34:04,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:04,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:04,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:04,555 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:04,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 20:34:04,591 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-02-07 20:34:04,606 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-02-07 20:34:04,606 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:04,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:04,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 20:34:04,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:04,671 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-07 20:34:04,671 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:04,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:04,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271115615] [2025-02-07 20:34:04,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:04,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332401975] [2025-02-07 20:34:04,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332401975] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:04,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:04,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:04,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267975658] [2025-02-07 20:34:04,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:04,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:04,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:04,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:04,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:04,674 INFO L87 Difference]: Start difference. First operand 56 states and 82 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:34:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:04,745 INFO L93 Difference]: Finished difference Result 63 states and 88 transitions. [2025-02-07 20:34:04,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:04,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2025-02-07 20:34:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:04,747 INFO L225 Difference]: With dead ends: 63 [2025-02-07 20:34:04,747 INFO L226 Difference]: Without dead ends: 59 [2025-02-07 20:34:04,747 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:34:04,748 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:04,748 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 118 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:04,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-07 20:34:04,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2025-02-07 20:34:04,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 33 states have internal predecessors, (40), 22 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2025-02-07 20:34:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2025-02-07 20:34:04,766 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 38 [2025-02-07 20:34:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:04,766 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2025-02-07 20:34:04,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-07 20:34:04,766 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2025-02-07 20:34:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-07 20:34:04,767 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:04,767 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] [2025-02-07 20:34:04,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 20:34:04,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:04,968 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:04,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:04,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1354723784, now seen corresponding path program 1 times [2025-02-07 20:34:04,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:04,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531956048] [2025-02-07 20:34:04,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:04,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:04,978 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-07 20:34:04,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-07 20:34:04,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:04,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 20:34:05,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:05,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531956048] [2025-02-07 20:34:05,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531956048] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:05,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:05,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:05,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998041340] [2025-02-07 20:34:05,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:05,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:05,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:05,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:05,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:05,156 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2025-02-07 20:34:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:05,194 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2025-02-07 20:34:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:05,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2025-02-07 20:34:05,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:05,196 INFO L225 Difference]: With dead ends: 65 [2025-02-07 20:34:05,196 INFO L226 Difference]: Without dead ends: 63 [2025-02-07 20:34:05,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:34:05,198 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:05,199 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 128 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-07 20:34:05,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2025-02-07 20:34:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 36 states have internal predecessors, (43), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2025-02-07 20:34:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2025-02-07 20:34:05,215 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 44 [2025-02-07 20:34:05,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:05,216 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2025-02-07 20:34:05,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2025-02-07 20:34:05,216 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2025-02-07 20:34:05,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-07 20:34:05,217 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:05,217 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:05,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-07 20:34:05,217 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:05,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:05,217 INFO L85 PathProgramCache]: Analyzing trace with hash -559237831, now seen corresponding path program 1 times [2025-02-07 20:34:05,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:05,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990346921] [2025-02-07 20:34:05,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:05,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:05,228 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-07 20:34:05,243 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 20:34:05,243 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:05,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:05,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512144082] [2025-02-07 20:34:05,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:05,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:05,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:05,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:34:05,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 20:34:05,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-07 20:34:05,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 20:34:05,302 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:05,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:05,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:34:05,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2025-02-07 20:34:05,402 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:05,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:05,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990346921] [2025-02-07 20:34:05,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:05,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512144082] [2025-02-07 20:34:05,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512144082] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:05,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:34:05,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-07 20:34:05,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939961124] [2025-02-07 20:34:05,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:05,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:05,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:05,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:05,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:34:05,404 INFO L87 Difference]: Start difference. First operand 63 states and 85 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, (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) [2025-02-07 20:34:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:05,460 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2025-02-07 20:34:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:05,461 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, (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 46 [2025-02-07 20:34:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:05,462 INFO L225 Difference]: With dead ends: 79 [2025-02-07 20:34:05,462 INFO L226 Difference]: Without dead ends: 77 [2025-02-07 20:34:05,462 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:34:05,463 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:05,463 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:05,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-02-07 20:34:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2025-02-07 20:34:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.225) internal successors, (49), 43 states have internal predecessors, (49), 25 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2025-02-07 20:34:05,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2025-02-07 20:34:05,480 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 46 [2025-02-07 20:34:05,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:05,480 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2025-02-07 20:34:05,480 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, (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) [2025-02-07 20:34:05,480 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2025-02-07 20:34:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-07 20:34:05,481 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:05,482 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:05,489 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 [2025-02-07 20:34:05,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:05,686 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:05,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:05,687 INFO L85 PathProgramCache]: Analyzing trace with hash -966289243, now seen corresponding path program 1 times [2025-02-07 20:34:05,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:05,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993174891] [2025-02-07 20:34:05,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:05,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:05,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-07 20:34:05,706 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 20:34:05,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:05,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-07 20:34:05,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:05,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993174891] [2025-02-07 20:34:05,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993174891] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:05,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354667766] [2025-02-07 20:34:05,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:05,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:05,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:05,968 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) [2025-02-07 20:34:05,970 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 [2025-02-07 20:34:05,994 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 49 statements into 1 equivalence classes. [2025-02-07 20:34:06,009 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 49 of 49 statements. [2025-02-07 20:34:06,009 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:06,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:06,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-07 20:34:06,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-07 20:34:06,120 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:34:06,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354667766] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:34:06,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:06,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2025-02-07 20:34:06,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741889752] [2025-02-07 20:34:06,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:06,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 20:34:06,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:06,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 20:34:06,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:34:06,122 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-02-07 20:34:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:06,212 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2025-02-07 20:34:06,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:34:06,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2025-02-07 20:34:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:06,213 INFO L225 Difference]: With dead ends: 87 [2025-02-07 20:34:06,213 INFO L226 Difference]: Without dead ends: 83 [2025-02-07 20:34:06,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-02-07 20:34:06,214 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:06,215 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 142 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-02-07 20:34:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2025-02-07 20:34:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 46 states have (on average 1.173913043478261) internal successors, (54), 49 states have internal predecessors, (54), 25 states have call successors, (25), 10 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2025-02-07 20:34:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2025-02-07 20:34:06,225 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 49 [2025-02-07 20:34:06,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:06,226 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2025-02-07 20:34:06,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2025-02-07 20:34:06,226 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2025-02-07 20:34:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-07 20:34:06,227 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:06,227 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:06,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-07 20:34:06,427 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,SelfDestructingSolverStorable6 [2025-02-07 20:34:06,427 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:06,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:06,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1553645885, now seen corresponding path program 1 times [2025-02-07 20:34:06,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:06,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519419481] [2025-02-07 20:34:06,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:06,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:06,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-07 20:34:06,441 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 20:34:06,441 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:06,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:06,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990409947] [2025-02-07 20:34:06,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:06,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:06,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:06,443 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) [2025-02-07 20:34:06,445 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 [2025-02-07 20:34:06,472 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-07 20:34:06,490 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-07 20:34:06,490 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:06,490 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:06,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-07 20:34:06,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-07 20:34:06,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2025-02-07 20:34:07,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:07,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519419481] [2025-02-07 20:34:07,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:07,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990409947] [2025-02-07 20:34:07,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990409947] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:07,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:34:07,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2025-02-07 20:34:07,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224164545] [2025-02-07 20:34:07,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:07,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 20:34:07,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:07,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 20:34:07,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:34:07,014 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2025-02-07 20:34:07,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:07,499 INFO L93 Difference]: Finished difference Result 132 states and 182 transitions. [2025-02-07 20:34:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-07 20:34:07,499 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 51 [2025-02-07 20:34:07,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:07,501 INFO L225 Difference]: With dead ends: 132 [2025-02-07 20:34:07,501 INFO L226 Difference]: Without dead ends: 130 [2025-02-07 20:34:07,502 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2025-02-07 20:34:07,502 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 48 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:07,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 225 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:34:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2025-02-07 20:34:07,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 108. [2025-02-07 20:34:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 64 states have internal predecessors, (75), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2025-02-07 20:34:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2025-02-07 20:34:07,546 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 51 [2025-02-07 20:34:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:07,546 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2025-02-07 20:34:07,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2025-02-07 20:34:07,547 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2025-02-07 20:34:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2025-02-07 20:34:07,550 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:07,550 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:07,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 20:34:07,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:07,751 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:07,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:07,751 INFO L85 PathProgramCache]: Analyzing trace with hash -324103079, now seen corresponding path program 2 times [2025-02-07 20:34:07,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:07,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738111670] [2025-02-07 20:34:07,751 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:07,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:07,757 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-02-07 20:34:07,769 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 20:34:07,770 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:07,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:07,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565749719] [2025-02-07 20:34:07,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:34:07,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:07,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:07,773 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) [2025-02-07 20:34:07,776 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 [2025-02-07 20:34:07,800 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 56 statements into 2 equivalence classes. [2025-02-07 20:34:07,818 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 56 of 56 statements. [2025-02-07 20:34:07,818 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:34:07,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:07,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-02-07 20:34:07,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-07 20:34:07,989 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-07 20:34:08,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:08,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738111670] [2025-02-07 20:34:08,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:08,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565749719] [2025-02-07 20:34:08,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565749719] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:08,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-07 20:34:08,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2025-02-07 20:34:08,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464803430] [2025-02-07 20:34:08,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:08,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-02-07 20:34:08,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:08,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-02-07 20:34:08,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:34:08,088 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2025-02-07 20:34:08,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:08,470 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2025-02-07 20:34:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-07 20:34:08,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 56 [2025-02-07 20:34:08,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:08,471 INFO L225 Difference]: With dead ends: 121 [2025-02-07 20:34:08,471 INFO L226 Difference]: Without dead ends: 103 [2025-02-07 20:34:08,472 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:34:08,472 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:08,472 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 177 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:34:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2025-02-07 20:34:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2025-02-07 20:34:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 30 states have call successors, (30), 11 states have call predecessors, (30), 11 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2025-02-07 20:34:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2025-02-07 20:34:08,505 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 56 [2025-02-07 20:34:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:08,505 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2025-02-07 20:34:08,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2025-02-07 20:34:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2025-02-07 20:34:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-02-07 20:34:08,507 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:08,507 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:08,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 20:34:08,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:08,713 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:08,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:08,713 INFO L85 PathProgramCache]: Analyzing trace with hash 423327123, now seen corresponding path program 1 times [2025-02-07 20:34:08,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:08,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202300516] [2025-02-07 20:34:08,713 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:08,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:08,717 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-02-07 20:34:08,728 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-02-07 20:34:08,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:08,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-07 20:34:08,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589697491] [2025-02-07 20:34:08,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:08,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:08,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:08,731 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) [2025-02-07 20:34:08,734 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 [2025-02-07 20:34:08,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-02-07 20:34:08,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-02-07 20:34:08,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:08,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:08,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-07 20:34:08,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-07 20:34:08,957 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2025-02-07 20:34:09,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:09,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202300516] [2025-02-07 20:34:09,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-07 20:34:09,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589697491] [2025-02-07 20:34:09,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589697491] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:09,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:34:09,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2025-02-07 20:34:09,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339896665] [2025-02-07 20:34:09,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:34:09,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:34:09,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:09,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:34:09,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:34:09,056 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2025-02-07 20:34:09,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:09,130 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2025-02-07 20:34:09,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:34:09,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 64 [2025-02-07 20:34:09,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:09,132 INFO L225 Difference]: With dead ends: 106 [2025-02-07 20:34:09,132 INFO L226 Difference]: Without dead ends: 101 [2025-02-07 20:34:09,132 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:34:09,133 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:09,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:34:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2025-02-07 20:34:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2025-02-07 20:34:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 60 states have internal predecessors, (71), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2025-02-07 20:34:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2025-02-07 20:34:09,156 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 64 [2025-02-07 20:34:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:09,157 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2025-02-07 20:34:09,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2025-02-07 20:34:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2025-02-07 20:34:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2025-02-07 20:34:09,158 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:34:09,158 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2025-02-07 20:34:09,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-02-07 20:34:09,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:09,362 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:34:09,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:34:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash 424133131, now seen corresponding path program 1 times [2025-02-07 20:34:09,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:34:09,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148245945] [2025-02-07 20:34:09,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:09,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:34:09,367 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-02-07 20:34:09,377 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-02-07 20:34:09,377 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:09,377 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-02-07 20:34:09,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:34:09,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148245945] [2025-02-07 20:34:09,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148245945] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:34:09,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159222361] [2025-02-07 20:34:09,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:34:09,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:09,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:34:09,557 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) [2025-02-07 20:34:09,559 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 [2025-02-07 20:34:09,586 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-02-07 20:34:09,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-02-07 20:34:09,603 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:34:09,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:34:09,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 20:34:09,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:34:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-02-07 20:34:09,652 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:34:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2025-02-07 20:34:09,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159222361] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:34:09,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:34:09,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2025-02-07 20:34:09,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854445801] [2025-02-07 20:34:09,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:34:09,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 20:34:09,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:34:09,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 20:34:09,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:34:09,742 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-07 20:34:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:34:09,860 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2025-02-07 20:34:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 20:34:09,861 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 67 [2025-02-07 20:34:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:34:09,861 INFO L225 Difference]: With dead ends: 110 [2025-02-07 20:34:09,861 INFO L226 Difference]: Without dead ends: 0 [2025-02-07 20:34:09,862 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-07 20:34:09,862 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:34:09,862 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 171 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:34:09,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2025-02-07 20:34:09,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2025-02-07 20:34:09,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:34:09,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2025-02-07 20:34:09,863 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2025-02-07 20:34:09,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:34:09,863 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2025-02-07 20:34:09,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2025-02-07 20:34:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2025-02-07 20:34:09,863 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2025-02-07 20:34:09,865 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2025-02-07 20:34:09,873 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 [2025-02-07 20:34:10,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:34:10,069 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:34:10,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2025-02-07 20:34:21,443 WARN L286 SmtUtils]: Spent 11.00s on a formula simplification. DAG size of input: 76 DAG size of output: 36 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2025-02-07 20:34:23,510 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-02-07 20:34:23,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 08:34:23 BoogieIcfgContainer [2025-02-07 20:34:23,522 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-02-07 20:34:23,522 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-02-07 20:34:23,522 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-02-07 20:34:23,522 INFO L274 PluginConnector]: Witness Printer initialized [2025-02-07 20:34:23,523 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:34:02" (3/4) ... [2025-02-07 20:34:23,525 INFO L146 WitnessPrinter]: Generating witness for correct program [2025-02-07 20:34:23,530 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2025-02-07 20:34:23,530 INFO L385 IcfgBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2025-02-07 20:34:23,533 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2025-02-07 20:34:23,533 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2025-02-07 20:34:23,534 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2025-02-07 20:34:23,534 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2025-02-07 20:34:23,599 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2025-02-07 20:34:23,600 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.yml [2025-02-07 20:34:23,600 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-02-07 20:34:23,601 INFO L158 Benchmark]: Toolchain (without parser) took 21287.42ms. Allocated memory is still 167.8MB. Free memory was 129.3MB in the beginning and 77.6MB in the end (delta: 51.7MB). Peak memory consumption was 47.0MB. Max. memory is 16.1GB. [2025-02-07 20:34:23,601 INFO L158 Benchmark]: CDTParser took 1.23ms. Allocated memory is still 201.3MB. Free memory is still 125.8MB. There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 20:34:23,601 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.49ms. Allocated memory is still 167.8MB. Free memory was 128.9MB in the beginning and 117.6MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-07 20:34:23,601 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.59ms. Allocated memory is still 167.8MB. Free memory was 117.6MB in the beginning and 116.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 20:34:23,601 INFO L158 Benchmark]: Boogie Preprocessor took 34.62ms. Allocated memory is still 167.8MB. Free memory was 116.4MB in the beginning and 115.4MB in the end (delta: 1.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-07 20:34:23,602 INFO L158 Benchmark]: IcfgBuilder took 273.11ms. Allocated memory is still 167.8MB. Free memory was 115.4MB in the beginning and 103.3MB in the end (delta: 12.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-02-07 20:34:23,602 INFO L158 Benchmark]: TraceAbstraction took 20655.99ms. Allocated memory is still 167.8MB. Free memory was 102.5MB in the beginning and 84.1MB in the end (delta: 18.3MB). Peak memory consumption was 64.2MB. Max. memory is 16.1GB. [2025-02-07 20:34:23,602 INFO L158 Benchmark]: Witness Printer took 77.64ms. Allocated memory is still 167.8MB. Free memory was 84.1MB in the beginning and 77.6MB in the end (delta: 6.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-02-07 20:34:23,603 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.23ms. Allocated memory is still 201.3MB. Free memory is still 125.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.49ms. Allocated memory is still 167.8MB. Free memory was 128.9MB in the beginning and 117.6MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.59ms. Allocated memory is still 167.8MB. Free memory was 117.6MB in the beginning and 116.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 34.62ms. Allocated memory is still 167.8MB. Free memory was 116.4MB in the beginning and 115.4MB in the end (delta: 1.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 273.11ms. Allocated memory is still 167.8MB. Free memory was 115.4MB in the beginning and 103.3MB in the end (delta: 12.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 20655.99ms. Allocated memory is still 167.8MB. Free memory was 102.5MB in the beginning and 84.1MB in the end (delta: 18.3MB). Peak memory consumption was 64.2MB. Max. memory is 16.1GB. * Witness Printer took 77.64ms. Allocated memory is still 167.8MB. Free memory was 84.1MB in the beginning and 77.6MB in the end (delta: 6.5MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.2s, OverallIterations: 11, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 129 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 100 mSDsluCounter, 1459 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1102 mSDsCounter, 86 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 613 IncrementalHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 86 mSolverCounterUnsat, 357 mSDtfsCounter, 613 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 728 GetRequests, 647 SyntacticMatches, 8 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=8, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 39 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 964 NumberOfCodeBlocks, 964 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 868 ConstructedInterpolants, 0 QuantifiedInterpolants, 2453 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1176 ConjunctsInSsa, 135 ConjunctsInUnsatCore, 18 InterpolantComputations, 8 PerfectInterpolantSequences, 1134/1195 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Location Invariant Derived location invariant: (((((((__int128) p * s) == (((__int128) q * r) + 1)) && (1 <= y)) && (((((__int128) r * y) + b) + ((__int128) p * x)) == ((a + ((__int128) s * y)) + ((__int128) q * x)))) && (y <= 20)) && ((((__int128) r * y) + ((__int128) p * x)) == a)) RESULT: Ultimate proved your program to be correct! [2025-02-07 20:34:23,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE